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Engineering without the engine: an integrated panelized passive shading system for transparent facades

Authors:

Abstract and Figures

ABSTRACT: During the latter half of the last century, architects emphasized lightness and transparency in buildings, with trends towards fully glazed building envelopes, including glass façades, atriums and roof structures. However, these glass facades presented challenges such as, the structural design of the envelopes for safety, durability of joints, as well as daylight glare control, thermal insulation and solar heat gain. Today’s changing paradigm for design, places an ever-greater emphasis on integrated solutions that are not only aesthetic and experiential, but embrace environmental influences. Environmental imperatives necessitate an agent for change that integrates environmental concerns with the human experience. Two contradictory factors influence the design of glass envelopes. On the one hand, stylist design overemphasizes the benefits of maximizing transparency (the desire to create ‘glass cathedrals’). This infatuation with transparency results in unintended consequences, namely, that glass facades are generally heavy and energy inefficient, resulting in solutions that are more expensive and wasteful of the planets resources. Therefore, there remain significant challenges for resolving the functional aspects in building facade designs. Whereas designs that are driven by pragmatic functional parameters are generally only concerned with the performance of a building, this in turn sacrifices the aesthetic form of a building in the interests of high performance. We address this conflicting issue by, considering both stylistic and pragmatic functionality, through an integrated passive solution. We address this by integrating “macro form” through function, related to occupancy and overall massing, with “micro configurations” through functional technology driven parameters. Thereby we adopt an integrative approach, which embraces multiple agents of interconnectivity that address aesthetics, energy, light, structure, materials, transparency, form and function. Our approach is to merge macro scale with micro function thorough what we call a “functionally graded” façade system. The system passively integrates these multiple agents within a single customized solution that uniquely responds to the specifics of building program, site and geographical location. In this paper, we demonstrate how such a novel façade system may function at the intersections of architectural design - aesthetics - structural - energy performance and human comfort, as a an effective high performance solution for transparent façades, with an exciting range of expressive aesthetics.
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1) (CIBSE 1
9
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, Harry Gile
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transparency
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and solar he
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rience.
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thedrals’). T
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h
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Our approach
a
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9
97) which ha
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ed to facades
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ing glass e
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nded thermal
a
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ating with ser
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g system. It
w
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cade, which
a
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rance of the b
u
:
Le Corbusier’s
Bibliotheque
N
n
gs filled with
r full floor to c
e
,
at great addi
t
the building,
s
ed external sh
e
:
Bibliotheque N
a
to enhance e
n
r
ast, windows
a
nd productivit
e
n architects
w
s
on selecting
e
nt. Advanced
t
ive system o
f
e like) in an
a
n
tal impact. (
C
’s changing p
a
g
rated concep
t
e
mbody aesth
e
v
e strategy. W
e
at the interse
c
O
GY
s
an approach
t
s
are structura
t
s allows for a
t
ions, both loc
a
o
rmance and
r
ology for dete
r
s
ure environ
m
g
, and quan
t
s
paper is to
o
ns learned fr
o
t
hrough futur
e
o
wing the initia
e
stablishing a f
u
CASE STU
D
n
velopes brou
g
a
nd structural
p
envelope, de
s
i
ous health co
n
s
s façade, Le
w
as comprised
a
ppeared like
u
ilding, which
d
Cite de Refuge:
N
ationale de F
r
light. (Anony
m
e
iling height w
o
t
ional expense
s
ince the woo
d
e
er glazed ap
p
a
tionale de Fran
n
velope perfor
m
are still valu
e
y of the buildi
n
w
ho usually pa
windows to
c
facades hav
e
f
functional co
a
ttempt to pro
d
C
armody 2007)
a
radigm, that p
r
t
s to avoid co
m
e
tics, light tran
s
e
are proposin
c
tion of archite
c
t
owards redefi
n
lly layered bet
w
geometrical t
r
a
lly within a flo
r
elative effecti
v
r
mining the effi
c
m
ental and s
t
t
itatively mea
s
create the ar
g
o
m precedent
c
e
research, hi
g
l results of res
e
u
lly evaluated
p
D
IES
g
ht transpare
n
p
roblems on t
h
s
igned by Le
n
sequences fo
r
Corbusier ap
p
of horizontal s
a large exte
d
iverted from t
h
original project
(
r
ance, the libr
a
m
ous 1997) A
f
o
oden shutter
s
. However, thi
s
d
panels were
p
earance of th
e
ce and the interi
o
m
ance, to the
e
d entities in t
n
g’s occupant
s
y attention to
e
c
ontrol solar h
e
e
attempted t
o
mponents (sh
a
d
uce energy
e
r
ioritizes envir
o
m
ponent layeri
n
s
mission, exp
e
g a new para
d
c
tural design,
s
n
ing facades
a
w
een the two
g
r
ansition to be
or plan and g
e
v
ness in comp
c
iency of this
s
t
ructural perf
o
s
ure user ex
p
g
ument for th
e
c
ase studies;
a
g
hlighting the
e
arch carried
o
p
aradigm.
n
cy and light
h
e other hand.
Corbusier in
r
the occupant
s
p
lied a type o
helves and ve
r
rnal egg-crat
e
h
e original inte
n
(
left) and with sh
a
ry was origin
a
f
ter constructi
o
s
to avoid dire
c
s
approach stil
placed inside
e
building. (Fig
.
o
r wooden shutt
e
overall detrim
e
t
he building e
n
s
. (Carmody 2
e
xterior desig
n
e
at gain, mee
t
o
address thi
s
a
ding louvers,
e
fficient, healt
h
o
nmentally frie
n
n
g. This provi
d
e
rience and st
r
d
igm that effe
c
s
tructural effici
e
a
s an integrate
d
g
lass panes. T
h
created withi
n
e
nerally acros
s
p
arison to vari
o
s
ystem accodri
o
rmance usin
p
erience base
d
e
need of a
n
a
nd then to pro
essential be
h
o
ut by the auth
o
into building
s
For example,
1932, was t
s
. (Banham 19
o
f macro scale
rtical fins distri
e
. This signifi
c
nded building
a
h
ades (right), (B
a
a
lly conceived
a
o
n, it was ne
c
c
t sunlight and
l
l failed to effe
c
e
the glazed f
a
.
3)
ers, (author, 201
e
nt of appear
a
n
velope that
c
007) Howeve
r
n
features, an
d
t
energy code
s
challenge, h
o
triple facade
s
h
y and econo
m
n
dly design, fa
d
es multifuctio
n
r
uctural perfor
m
c
tively transitio
e
ncy and ener
g
d
shading pan
e
h
e geometrica
l
n
the system,
t
s
the overall
f
o
us façade sol
ng to a set of
m
g computer
d
on surveys
n
ew paradigm
o
pose a new p
a
h
aviors of the
ors in this are
a
s
on one ha
n
the Cite de R
e
he first docu
m
9
84) In order to
e
brise- solei”
,
buted over th
e
c
antly influenc
a
ppearance. (
F
a
nham 1984)
a
s a complex
o
c
essary to intr
o
potential dam
a
c
tively control
a
çade, to pres
e
1
3)
a
nce and hum
a
c
ontribute to t
h
r
, a disfunctio
n
d
the mechani
c
s and downsi
z
o
wever this h
a
s
, light shelv
e
m
ic buildings,
cades are bett
n
al performan
c
m
ance within
a
ns “macro for
m
g
y efficiency.
e
l system,whe
l
configuration
t
hat responds
f
açade. In ord
utions, we ha
v
m
etrics that bo
simulation a
n
and subjecti
v
based on p
a
a
radigm that c
a
various faça
d
a
and to propo
s
n
d, but caus
e
e
fuge, a buildi
n
m
ented case
reduce the he
,
as an exter
n
e
entire extent
ed the exter
n
F
ig. 2)
o
f ethereal gla
s
o
duce additio
n
a
ge to the boo
k
solar heat gai
n
e
rve the origi
n
a
n
h
e
n
al
c
al
z
e
a
s
e
s,
to
er
c
e
a
n
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re
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to
er
v
e
th
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d
v
e
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st
a
n
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e
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d
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of
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al
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al
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al
Thes
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glass
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how t
h
intern
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3.0.
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o
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a
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h
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extra
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a
One e
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o
for th
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magic
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grade
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progr
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asse
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user’s
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3.2.
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ransitional
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alaki 2012) In
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pattern on t
h
a
mmatic elem
e
m
bly of the faç
experience. (
N
zing the exter
n
s
sed, such as
s
:
Mehrdad Hadi
g
v
er what is d
e
a
l or horizonta
f
acades as a c
A
ctive shadi
n
shading devi
c
e
, which is an
a
retractable fa
b
o
on sun. This
shading oper
a
s
t the morning
a
)
Winte
r
d
emonstrate t
h
e
ther with the
c
cantly alter th
a
lly.
T
ION APPR
O
p
assive sha
d
shading devi
c
Ds can redu
c
reduce glare.
slats, which a
n
tal louvers p
r
a study, Mand
he showed t
h
energy dem
a
another study,
of internal de
v
)
Gratia and
D
n the cavity. T
h
e 2007) Howe
v
u
ral role in gl
n blind system
t
rength to a do
d
weight.
e
of using tran
s
u
re”, who desi
g
4
8. This buildi
n
e flow of prod
u
e
exterior wher
çade is comp
h
e building e
x
e
nts inside, but
ade, and crea
N
eveu 2012)
H
n
al appearanc
e
the need for
g
hi’s design for
L
e
monstrated i
s
l
shading blin
d
ustomized ap
p
n
g devices f
o
c
es have been
a
ll-glass enclo
s
b
ric to provide
in turn altered
a
tes on the e
a
and afternoon
b
)
Summ
e
h
e significant i
m
c
onsequencs o
e original co
n
O
ACHES TO
F
d
ing devices
c
es (SDs) on
g
c
e thermal lo
a
(Mandalaki
2
re used not o
n
r
ovide shadin
g
alaki referred
t
h
at this exteri
o
a
nd on heatin
g
Kim demonst
r
v
ices since th
e
D
e Herde sugg
h
e shading de
v
v
er, past rese
a
azed facades
,
s will not only
uble glazed s
y
s
itional shadin
g
g
ned a wavy
n
g houses all
u
ction, literally
e a double-ski
o
sed of twisti
n
terior. (Fig. 4)
also address
e
te different pl
a
H
owever in ma
e
and does no
t
good views o
u
L
afayette 148 in
S
s
that interior
d
systems. Th
i
p
roach related
t
o
r glass env
e
used in vario
u
s
ure in Kew Bo
t
adjustable sh
a
the appearan
c
a
st and west
s
sun respectiv
e
er
Fig. 5:
require
s
within
a
m
pact of heat
a
f not taking th
e
n
cept as well
a
F
AÇADE DE
S
on glass en
g
lass facades
a
ds during su
m
2
012) Louvers
n
ly for solar sh
a
g
similar to an
t
o Brise-Soleil
o
r surrounding
g
, cooling an
d
r
ated that exte
r
e
internal devi
c
e
sted that in t
v
ice is thus pr
o
a
rch has not a
d
,
in addition
have thermal
b
y
stem that can
g
was implem
e
graded” concr
the functions
from concepti
o
n façade eleg
a
n
g concrete p
a
Size and sh
a
e
s environment
a
ys of light an
d
ny instances,
v
t
fully address
a
u
t and limiting
S
hantou, China,
and exterior
d
s is an effecti
v
t
o a building’s
s
e
lopes
u
s building en
v
t
anic gardens,
a
ding in order
t
c
e of the buildi
s
ides of the g
l
e
ly (Fig. 5).
a) Winter mode
s
a dynamic sha
d
a
double-layered
a
nd lighting c
o
e
se into accou
n
as the user
e
SIGN
n
velopes
provides ben
e
m
mer dayligh
t
and blinds
m
ading, but als
o
overhang wit
as horizontal
a
shading syst
e
d
lighting as
rnal shading d
e
c
es absorb so
t
he case of a
d
o
tected from in
c
d
dressed how
t
to their shad
i
b
enefits, but al
lead to a redu
c
e
nted on a buil
d
r
ete facade for
of the Lafay
e
on to shipme
n
a
ntly wraps th
e
a
nels that cre
a
pe for the gr
a
t
al concerns. T
d shadow on
v
isible transp
a
a
ll the necess
a
of high main
t
(Neveu 2012)
d
esigns can b
ve method fo
r
s
pecific functi
o
v
elope solutio
n
which used a
t
o shield the i
n
ng envelope.
(
lasshouse ind
e
e
and, b) Summe
d
ing device to b
e
6mm toughene
d
o
nsiderations i
n
nt during the
d
e
xperince of t
h
e
fits in terms
o
t
, enhance vi
s
m
ay be comp
o
o
for redirectin
g
h improved d
a
a
nd vertical lo
u
e
m, called Bri
s
compared to
e
vices are mu
c
lar heat, whic
h
d
ouble-skin fa
c
c
lement weath
t
he integrated
i
ng function.
so they can p
o
c
tion in glass t
h
d
ing by, Mehr
d
Shantou, Chi
n
e
tte 148 cloth
i
n
t of the final
p
e
east, south
a
ate a continu
o
a
ding not only
he perforated
p
the interior th
a
a
rency is com
p
a
ry parameter
s
t
enance costs
e effectively
a
r
controlling s
o
o
nal requireme
n
s. One exam
p
system of win
c
n
terior against
t
(
Wilford 2007)
.
e
pendently, in
e
r mode Davis Al
e
deployed durin
d
glass panes. (
F
n
the design o
f
d
esign stage a
n
h
e building bo
o
f reducing sol
s
ion experien
c
o
sed of multi
p
g
daylight. Fix
e
a
ylight potenti
a
u
vers, in a larg
s
e-Soleil facad
other syste
m
c
h more efficie
h
radiates to t
h
c
ade, the blin
d
h
er and pollutio
shading devic
e
In other wor
d
o
tentially provi
d
h
ickness, savi
n
d
ad Hadighi fro
n
a headquarte
i
ng label and
p
roduct. The r
e
a
nd west side
o
usly varying
corresponds
p
anels aid in t
h
a
t enhances t
h
p
romised agai
n
s
that need to
b
on the exter
n
a
ddressed usi
n
o
lar heat gain
nts.
p
le is the Alpi
n
c
hes and pulle
y
t
he morning a
n
.
The retracta
b
order to sha
d
pine glasshous
e
n
g hot summer
m
F
inch 2005)
f
a
n
d
th
ar
c
e
p
le
e
d
a
l.
e-
e,
m
s.
nt
h
e
d
s
n.
e
s
d
s,
d
e
n
g
m
e
rs
is
e
al
of
or
to
h
e
h
e
n
st
b
e
n
al
n
g
of
n
e
y
s
n
d
b
le
d
e
e
m
onths;
Howe
v
intern
a
efficie
n
appro
a
3.3.
T
Glass
There
can b
e
SANN
SAN
A
panel
s
locate
Fig. 6
Anoth
e
transl
u
goods
experi
drasti
c
not h
a
Fig.7:
Anoth
e
functi
o
parap
e
transl
u
story
h
Trans
i
lower
trans
p
Fig.8:
Trans
l
consi
d
conse
There
f
visibili
t
perfor
m
v
er, an interio
r
a
l shading, alb
n
t solution for
a
ch that integr
a
T
ranslucent l
can be transp
are instances
e
related to pr
o
A, glass was
d
A
A’s ideas cre
a
s
that appear
d
in the interio
r
:
Dior building in
e
r similar app
u
cent glass bl
o
on display)
b
ence from wi
t
c
ally changes
t
a
ve been possi
b
Maison Herme
s
e
r approach
t
o
n, where, for
e
e
t areas. Tra
n
u
cency is crea
t
h
otel named A
r
i
tional transpa
r
part of the gl
p
arent. (Fig. 8)
Arc de Trimoph
e
l
ucent facade
s
d
eration, it o
b
q
uently reduci
n
f
ore, an appr
o
t
y, solar tra
n
m
ance within
a
r
fabric both in
c
eit an effectiv
e
greenhouses,
a
tes building f
u
ight emittin
g
arent or transl
u
where transp
a
o
grammatic fu
n
d
eployed in la
y
a
ted a dramati
c
like folded fa
r
and make th
e
Tokyo designe
d
roach was ad
o
cks were use
d
b
y avoiding a
n
t
hin. Inspired
b
t
he building’s
e
b
le with a fully
s
in Tokyo desig
n
hat transition
s
e
xample, trans
n
sparent area
s
t
ed between t
h
r
c de Triomph
e
r
ency is creat
e
azing, to pre
v
(Kristal 2011)
e
hotel, the line
s
s
provide a
h
b
scures the vi
n
g user comfo
r
o
priate solutio
n
smission an
d
a
n integrated s
o
c
reases cost
a
e
solution for c
o
the opposite i
s
u
nction with en
e
g
facades in
u
cent as a de
v
a
rency is not
e
n
ction. As an e
x
y
ered vertical
p
c
result that b
o
bric. (Philips
2
e
façade entire
l
d
by SANAA, (B
e
opted on the
d
as a device t
o
n
y transparen
c
b
y traditional
J
e
xpression fro
m
transparent fa
ç
n
ed by Renzo Pi
a
s
between cle
lucent areas a
r
s
are only lo
c
h
e solid and tr
a
e
, using undul
a
e
d using a cer
a
v
ent users fro
m
s
of fritted glass
g
h
igh quality o
f
ew to the o
u
r
t.
n may be on
d
energy gai
n
o
lution that is
m
a
nd does not
a
o
ntrolling the li
s
true for occu
p
e
rgy performa
n
glazed build
v
ice for transm
e
ssential, yet li
x
ample, in the
p
lanes as a wa
y
o
asts a skin of
2
004) These
h
l
y non-transpa
r
e
ll and Kim 2009
)
Maison Herm
o
focus the bu
i
y to the outd
o
J
apanese lant
e
m
day to night.
ç
ade or one th
a
a
no, (Brown 20
0
ar and transl
u
r
e created acr
o
c
ated in the
v
a
nsparent zon
e
a
ting glass ribb
o
a
mic frit that
g
m
experiencin
g
g
radually chang
e
f
diffused lig
h
u
tside and m
a
e that combi
n
n
s within as
s
m
ulti-functiona
l
a
ddress the he
i
ghting dynami
pied buildings
n
ce.
d
ings
itting or diffusi
ght transmissi
o
Christian Dior
y
to obfuscate
flat glass pan
e
half-transpare
n
r
ent but light tr
a
)
m
es building lo
i
lding user ex
p
o
ors yet provi
d
erns, Renzo
P
.
(Brown 2009
)
at is heavily s
h
0
9)
u
cent glazing
o
ss the buildin
g
v
ision band,
w
e
s. Christian
d
o
ns that form
a
g
rades the tra
n
g
vertigo and
e
from bottom to
h
t into a buil
d
a
y increase
d
n
es functional
s
ociated zon
e
l
ly passive.
at gain issues
cally. Althoug
h
and as such
n
ng daylight to
o
n is, and in
s
building in To
k
the slab. (Be
l
e
ls over acryli
c
n
t curved acr
y
ansmitting. (Fi
g
cated in Tok
y
p
erience to the
d
ing a delight
f
P
iano designe
d
)
(Fig. 7) This
h
aded.
to different e
g
structural, s
e
w
hereby a gr
a
d
e Portzampar
c
a
large interwo
v
n
slucency den
s
the upper pa
top, (Kristal 201
d
ing. Howeve
d
irect glare fr
o
components
e
s that seam
associated wi
h
this may be
a
n
eeds a differe
different effec
t
s
ome cases, t
h
kyo designed
b
l
l and Kim 200
c
thermo-form
e
y
lic screens a
g
. 6)
y
o. In this ca
s
interior, (i.e. t
h
f
ul light emitti
n
d
a façade th
would otherwi
s
ffect, related
e
rvices and util
i
a
dual density
c
created a fiv
v
en glazed pl
a
s
ity between t
h
a
rt which is fu
l
1)
r, by functio
n
o
m the facad
to control lig
h
lessly enhan
c
th
a
n
nt
t
s.
h
is
b
y
9)
e
d
re
s
e,
h
e
n
g
at
s
e
to
i
ty
of
e-
a
it.
h
e
l
ly
n
al
e,
h
t,
c
e
4.0.
A
4.1.
F
Wind
o
“Any
d
mann
e
We h
a
failed
that a
r
propo
s
contr
o
exter
n
and p
r
aesth
e
requir
e
follow
i
could
perfor
m
mimi
m
contin
appe
a
select
i
The l
a
glaze
d
the ot
h
simila
r
4.2.
F
In the
heat,
l
config
panes
are b
a
syste
m
panes
thickn
e
and s
t
in Fig.
Fig.
com
p
A
LAYERED
F
F
unctionally
g
o
w design is n
o
d
iscussion of
w
e
r is incomplet
e
a
ve demonstr
a
and others th
a
r
e cost effecti
v
s
ed approach
o
l, but can als
o
al appearanc
e
r
ovides a new
e
tic opportuni
t
e
ments. The
f
ng diagram (
F
create the o
p
m
ance, there
m
ize these c
o
uously varies
a
rance require
m
i
on of façade
s
a
rgest areas c
o
d
and existing
a
h
er, compromi
z
r
and higher p
e
F
unctionally
g
context of pro
p
ight, materials
urations, on t
h
at 3 mm eac
h
a
sed on struc
t
m
within the g
l
can be kept
e
ss increases
w
t
ructural perfo
r
10.
9: Functional
p
aring different f
a
F
UNCTIONA
g
raded pro
g
o
t just glazing
w
indows with
o
e
.” (Carmody
2
a
ted a numbe
r
a
t have been
o
v
e and optima
is for solar co
n
o
provide a
m
e
, by integrat
i
aesthetic that
t
ies and refle
c
f
unctional par
a
F
ig. 9). If a fa
ç
p
timal façade
are always c
o
o
mpromizes
b
across its ele
v
m
ents. Fig.
s
olution perfor
o
vered in all
c
a
dvanced faç
a
z
ing important
e
rformance in
a
g
raded tech
n
p
osing a functi
and structural
h
e environme
n
h
and the dep
t
t
ural codes go
l
ass cavity, a
s
constant in
a
w
ith increases
r
mance param
e
grading by pe
r
a
çade systems,
LLY GRAD
E
rammatic p
a
selection, but
o
ut considerin
g
2
007)
r
of approach
e
o
pportunistic t
o
lly solve all th
e
n
trols to be co
m
ore dynamic
ng them withi
n
represents a
m
c
ts the custo
m
a
meters that
a
ç
ade solution
w
solution. Des
p
o
mpromizes t
h
b
y proposing
v
ation in resp
o
9, qualitativel
y
mance metric
s
c
ategories, re
p
a
de systems t
h
performance
r
a
ll categories.
n
ological pa
onally graded
metrics of a
d
n
tal performan
t
h of the shadi
verning the gl
s
the depth of
a
particular sp
a
in spans. The
e
ters with inte
g
r
formance char
a
(authors 2013)
E
D FAÇADE
S
a
rameters
requires arch
i
g
the means t
e
s to solving a
o
wards a parti
c
e
complex fu
n
nsidered not
o
multi dimensi
o
n
the glass la
y
m
ultifunctional
m
ized nature
a
façade nee
d
w
as able to ad
p
ite many his
t
h
at result in a
n
an optimized
o
nse to changi
y
demonstrat
e
s
accodring to
resent an opti
h
at have less
c
r
equirements.
T
rameters
façade syste
m
d
ouble layered
ce of a buildi
n
ng panel syst
e
ass structure
s
the whole str
u
a
n, compared
optimization p
r
g
rated compo
n
a
cteristic:
S
YSTEM
itectural elem
e
t
o temper and
façades func
t
c
ular goal. Ho
w
n
ctional issues
,
o
nly as one-di
m
o
nal response
y
ering. This off
e
solution. This
of a buildin
g
d
s to respond
dress all thes
e
t
orical attemp
t
n
“either/or” s
o
functionally
ng peformanc
e
e
s an optimiz
a
a range of o
b
mal solution
c
c
overage and
a
T
hese could b
e
m
, our technolo
glass system,
n
g. This inclu
d
e
m around 10
0
s
’ design. By
u
cture increas
e
to typical gl
a
rocess that rel
a
n
ent design c
o
Fig. 10:
S
components in
Energy and
(authors 2013)
e
nts to inform
control light
i
t
ional require
m
w
ever fully int
e
, remain elusi
v
m
ensional ele
m
to both inter
n
e
rs further str
u
in turn offers
a
g
s function a
n
to, are dem
o
e
functions si
m
t
s to optimize
o
lution. We a
r
graded faça
d
e, functions,
p
a
tion strategy
b
jective and s
u
c
ompared to c
o
a
re skewed in
e
better balan
c
gy investigatio
evaluated for
d
es a thickne
s
0
mm. The pri
m
integrating th
e
e
s, the thickn
e
a
ss systems,
w
a
tes the two in
o
nsiderations,
a
S
ystem summ
a
the integrated
Structural p
e
the space its
e
i
n an integrat
e
m
ents, that ha
v
e
grated syste
m
v
e. The autho
r
m
ents for ener
g
n
al function a
n
u
ctural efficien
c
a
wide variety
n
d performan
c
o
nstarted in t
h
m
ultaneously,
w
façade syste
r
e attempting
d
e system th
p
rogramattic a
n
that weights
u
bjective criteri
o
nventional fu
l
one direction
c
ed by achievi
n
ns are explori
n
various shadi
n
s
s for the gla
s
m
ary dimensio
n
e
shading pa
n
e
ss of the gla
s
w
here the gla
s
terfacing ener
g
a
re summariz
e
a
ry - interfacin
g
systems design
e
rformance pa
r
e
lf.
e
d
v
e
m
s
r
s’
g
y
n
d
c
y
of
c
e
h
e
w
e
e
m
to
at
n
d
a
a.
l
ly
or
n
g
n
g
n
g
s
s
n
s
n
el
s
s
s
s
g
y
e
d
g
façade
for both
r
ameters,
In th
e
appro
a
an in
n
an in
n
comp
o
furthe
r
result
s
the e
x
façad
e
4.3 F
u
4.3.1
.
A co
m
buildi
n
This
s
efficie
n
interio
which
functi
o
New
a
conte
m
const
r
Fig. 1
1
4.3.2
.
More
towar
d
asse
m
the u
s
experi
Layeri
resea
r
panel
Accor
d
can b
e
(Wur
m
which
innov
a
geom
e
in a si
n
4.3.3
There
which
deep
c
cavity
Fig.
1
sand
w
11.
e
following se
c
a
ches for dev
e
ovative and in
n
er core elem
e
o
site facade c
o
r
quantify ho
w
s
in overall th
e
x
ternal appear
a
e
.
u
nctionally
g
Partitioned
m
mon window
s
n
gs, is partitio
n
s
ystem combi
n
n
cy). This app
r space. The
s
has a recogni
z
o
n independen
a
pproaches to
m
porary appr
o
r
uction concep
t
1
:
Deriving a “fu
Layered sy
s
contemporary
d
s larger ligh
t
m
blies and in s
o
s
e of excessiv
e
enced in such
ng of a hybr
i
r
ched as sho
w
system, with i
n
d
ing to Wurm,
e
achieved wi
m
2007) The b
u
opens a wid
e
a
tive structural
e
tric configurat
n
gle façade sy
Macro vers
u
are three typ
e
includes floor
c
avity using s
p
with an inter
1
2: Concept mo
d
w
ich construction
a: Partitioned
c
tion, we ela
b
e
loping a functi
o
tegrated faça
d
e
nt in the int
e
o
nfiguration w
h
w
the core ele
m
e
rmal benefits
a
a
nce of a buil
d
g
raded wind
o
system
s
ystem used i
n
n
ed. Figure 11
n
es transpare
n
roach in wind
o
s
trategy that c
o
z
able effect o
n
tly and does
n
materials, con
s
o
aches to unif
i
t
, where the wi
n
nctionally grade
d
s
tem
approaches h
t
emitting fac
a
o
me instances
,
e
ly thick glass
fully glazed s
y
i
d sandwich t
o
w
n in Figure 12
n
tegrated shad
“The accepta
n
th automated
u
ild-up of thes
e
e
scope of po
s
ly monolithic
t
ions of the co
n
stem. (Giles 2
0
u
s Micro gri
d
e
s of grid that
to floor ledge
s
p
acing of simil
nal venetian
t
d
els for interacti
v
desi
g
n,
(
Wurm
2
b
orate further
o
nally graded
f
d
e structural s
y
e
rmediate air
s
h
ich is very ef
f
m
ents provide
a
nd reflects in
t
d
ing envelope,
o
w systems
n
many buildin
g
a shows this
n
cy (for light
o
w design mini
o
nsiders differ
e
n
the appeara
n
n
ot attempt to
s
truction and
e
i
ed and multif
n
dows are still
d
system” by co
m
ave attempte
d
a
des. The so
l
,
full floor to c
e
to work struc
t
y
stems.
o
enhance th
e
. This layering
ing elements.
n
ce of sandwi
c
manufacturin
g
e
sandwiches,
s
s
sibilities for m
t
ransparent fa
c
n
nected core e
l
0
08) (Fig. 13)
d
system
can be used
t
s
and fins; se
c
ar dimension;
t
ype of blind.
v
e
2
007
)
11.b: La
on the propo
s
f
açade system
y
stem approac
h
s
pace, to a d
o
f
icient and lig
h
a structural r
o
t
ernal function
.
by creating a
g
s, including c
layout that in
c
and views)
w
mizes the gla
s
e
nt functions r
e
n
ce of the buil
d
integrate form
e
nergy efficien
c
unctional buil
d
partitioned or
c
m
bining a “partiti
o
d
to create en
v
l
utions are st
i
e
iling clear or t
r
t
urally, togeth
e
e
structural e
f
can serve to
e
h construction
g
processes in
s
election of m
a
anufacture, fu
c
ade system,
l
ements, as w
a
t
o provide flo
o
c
ondly a “medi
u
and thirdly, a
(Fig. 14) Th
e
yered
s
ed configura
t
, based on the
h
(Giles 2008)
,
o
uble glazed
s
h
tweight. This
o
le as well a
s
. This interacti
v
rich and var
y
hurches, castl
e
c
ludes punche
d
w
ith opacity (f
o
s
s surfaces, a
c
e
lated to adjac
e
d
ing. This ap
p
m
with function
c
y have permi
t
d
ing envelope
s
c
over entire fa
c
oned” and a “la
y
v
elope syste
m
i
ll somewhat
r
ansparent fac
a
e
r with addres
s
fficiency of a
e
nhance struc
t
to glass archi
t
n
terms of ec
o
a
terials and th
e
nction and de
s
creates a sh
a
a
y to integrate
o
r to floor sha
d
u
m” system w
h
“micro” syste
m
e
depth of th
e
Fig. 13: Qua
t
ion imperativ
e
e
basic principl
e
, which monoli
s
heet, to crea
approach has
s
a shading f
u
v
e functionalit
y
y
ing textural gr
e
s, residential
d
windows in
a
o
r solidity, co
c
cording to th
e
e
nt spaces, is
p
roach addres
s
in a single b
u
t
ted the indust
r
s
, driven by t
h
cades as disc
u
y
ered” system, (
a
m
s that are ubi
contained wit
h
ade approach
e
s
ing the exce
s
transparent
p
t
ural efficienc
y
t
ecture depen
d
o
nomy and qu
a
e
geometry of t
h
s
ign. SITUMB
R
a
ding function
structure with
s
d
ing. Firstly, a
h
ich is based
o
m
which is ba
s
e
louvers in e
d cell, (Giles 20
0
11.c: Functi
o
e
s and propo
s
e
s developed
f
thically attach
e
te a structura
l
the potential
u
nction that al
s
y
also enhanc
e
ain to the enti
and commerc
i
a
n opaque w
a
st, and ther
m
e
needs of eve
energy efficie
n
s
es each interi
u
ilding envelop
r
y to adopt mo
h
e ‘curtain w
a
u
ssed before.
a
utho
r
s 2013)
quitous in for
m
h
in curtain w
a
e
s. This requir
e
s
sive heat gai
n
p
anel has be
e
y
as a composi
d
s on how mu
c
a
lity standard
s
he layers vari
e
R
A, which is
a
though vario
u
s
hading functi
o
“macro” syste
o
n a 4 or 6 in
c
s
ed on a 1 in
c
ach scenario
0
8)
o
nally graded
s
e
f
or
e
s
l
ly
to
s
o
e
s
re
i
al
a
ll.
m
al
ry
n
t,
or
e.
re
a
ll’
m
,
a
ll
e
s
n
s
e
n
te
c
h
s
.”
e
s,
a
n
u
s
o
n
m
c
h
c
h
is
propo
r
horizo
and
m
grain”
addin
g
the in
therm
a
4.3.4
.
It is p
o
and l
a
syste
m
the la
y
Fig. 4
)
Fig. 1
3
functi
o
repre
s
the fi
n
variou
partiti
o
& 16).
achie
v
by th
e
shade
geom
e
micro
depe
n
4.4.
F
In ord
e
many
and t
h
studie
s
desig
n
recta
n
Anoth
e
point.
(Fig.
1
carrie
d
Figur
e
Fig.1
6
Fig.
1
Medi
u
r
tional to the
ntal and vertic
a
m
icro grid syst
e
brise-soleil s
y
g
an additional
ner and oute
r
a
l performanc
e
Graded sy
s
o
stulated that
a
a
yered system
m
that also ex
p
y
out of interna
)
, combined w
i
3
). This appro
a
o
n (similar to
s
ented in Fig.
8
n
al solution ma
s modes of
o
ned systems”
In this appro
a
v
e excellent st
r
e
interior spac
e
, and also stif
f
e
try is not dis
c
system has th
e
dency, orienta
F
unctionally
g
e
r to fully em
b
parameters, i
n
h
e available fa
s
that optimiz
e
n
and fabricati
o
gular grid syst
e
e
r design app
r
Several geom
1
6). Further s
t
d
out to creat
e
e
17 below.
6
:
Creating a fun
1
4: Three differ
e
u
m, c
)
Macro
(
au
t
dimensions
o
a
l shading de
v
e
m. In anothe
y
stem that is i
n
layer externa
r
transparent
w
e
of the facade
s
tem
a
façade syste
into an integr
a
p
resses its fun
l spaces such
i
th a structural
a
ch also provi
d
the transition
a
8
). Learning fr
o
y be fully or p
a
transparency.
and an “integ
r
a
ch, a core sys
t
r
uctural efficie
n
e
s’ functions a
n
f
ens the glass
c
rete but occu
r
e
potential to
a
t
ion and interi
o
g
raded faça
d
b
race the funct
n
cluding the b
u
brication tech
n
e
on system
p
o
n of the functi
o
e
m that may v
a
r
oach uses a
c
etric patterns
t
udies that tra
n
e
an interspe
r
ctionally graded
e
nt types of grid:
t
hors 2013
)
o
f the grid-sh
a
v
ices can be u
s
r words, the “
n
tegrated with
i
l
to the facad
e
w
indow mate
r
as well as pla
y
m may be co
n
a
ted system th
a
ctions. For ex
a
as the macro
composite co
d
es the neces
s
a
l grading of
t
o
m the design
a
rtially translu
c
Therefore,
o
r
ated layered s
t
em is still co
m
n
cy. This core
s
n
d/or light tran
s
surface to pro
r
s through gen
e
a
ddress all the
o
r function.
d
e geometri
e
ionally graded
u
ilding’s need
s
n
iques are bei
n
p
erformance.
T
o
nally graded
c
a
ry by interior
f
c
ircular patter
n
based on frac
t
n
sition the ac
t
ced micro to
shading system
a) Micro, b)
a
ped glass di
v
s
ed in a glass
f
large grain” s
h
i
n the cavity o
e
. This fixed c
a
r
ial, can meet
y
ing a structur
a
n
figured to co
m
a
t embraces
m
a
mple, a geo
m
scale in the
L
nfiguration su
c
s
ary shading,
b
t
he glazed fri
t
solutions for t
h
c
ent, dependin
o
ur proposed
ystem”, to bec
m
positely sand
w
s
ystem may h
a
s
mission char
a
v
ide a light w
e
e
rative param
e
building’s req
u
e
s
components i
n
s
, the core ge
o
n
g addressed
T
here is an on
c
ore systems.
f
unction.
n
that varies
d
t
al variations
a
t
ual interconn
e
macro grid co
, based on gene
Wint
e
Fig.
bet
w
v
isions. Simil
a
f
açade system
,
h
ading louver
s
o
f a double-la
y
a
vity inner stru
multiple spe
c
a
l role for the
w
m
bine the prim
a
m
ulti functions
(
m
etric grading
L
afayette 148
b
c
h as the SIT
U
b
y locating th
e
t
ting on the
A
h
e Dior and H
e
g on the build
i
system effec
t
c
ome a “functi
o
w
iched betwe
e
a
ve a progress
i
a
cteristics. Th
e
e
ight glazing s
y
e
tric modeling.
u
irements para
n the design
o
o
metry and its
in a series of
n
going explora
t
We have start
e
d
epending on
i
a
re also possi
b
e
cting cells b
e
o
nfiguration, s
u
rative compone
n
er
.
15: The shadin
w
een two glass p
a
r to Le Corb
,
but scaled d
o
s
can transfor
m
y
ered glass sy
s
ctural core, w
h
c
ifications incl
u
w
hole system.
(
a
ry capabilitie
s
(
Fig. 9), thus r
e
(Fig. 11c) ma
y
b
uilding façad
e
U
MBRA syste
m
e
shading ele
m
A
rc de Trimop
h
e
rmes building
i
ng program,
o
t
ively morphs
o
nally graded s
e
n two separat
e
i
vely varying g
e
e
core plays a
y
stem. The ch
This approac
a
metrically, su
c
o
f a glazed faç
variation’s, th
e
geometric an
d
t
ion on the p
o
ed this proces
s
i
ts distance fr
o
b
le, using a re
e
tween glass l
a
u
ch as those
d
n
t geometries, (
a
Summ
e
n
g system functi
o
p
anes. (Giles 20
0
usier’s solutio
o
wn to a mediu
m
to a “mediu
s
tem, instead
h
ich connects
u
ding enhanc
e
(
Fig. 15)
s
of a partition
e
e
presented as
y
both represe
e
represented
m
represented
m
ents by inter
n
h
e hotel faça
d
s (Fig. 6 and
7
o
r graded acro
s
a “functiona
l
ystem” (Fig. 1
1
e
glass panes
e
ometry, grad
e
role in providi
n
ange rate of t
h
h in designing
c
h as solar an
g
ade system, t
h
e
core’s mater
i
d
manufacturi
n
o
ssibilities of t
h
s
by designing
o
m an attracti
o
e
ctangular layo
a
yers are bei
n
d
emonstrated
a
utho
r
s 2013)
er
o
nall
y
integrated
0
8)
n,
m
m
of
to
e
d
e
d
a
nt
in
in
n
al
d
e
7
),
s
s
l
ly
1
c
to
e
d
n
g
h
e
a
g
le
h
e
i
al
n
g
h
e
a
o
n
ut
n
g
in
5.0.
C
A faç
a
a buil
functi
o
transi
t
respo
n
of fu
n
geom
e
In ad
d
enha
n
not o
n
The c
other
f
respo
n
appe
a
this s
y
uniqu
e
cell s
y
those
functi
o
REF
E
Anon
y
Banh
a
Bell,
M
Brow
n
Carm
o
CIBS
E
Finch,
Giles,
Gratia
Kim,
G
Knaa
k
Krista
l
Lee,
Mand
a
Fig.
1
C
ONCLUSIO
N
a
de’s configura
ding and so
m
o
ns. In contra
s
t
ion in respon
s
n
se to these f
u
n
ctional rules,
e
trical form.
d
ition, a layere
d
ce the role of
t
ly increases t
h
o
ncept of a “f
u
f
unctional asp
e
n
ses to inter
n
a
rance that refl
e
y
stem has be
e
e
fabrication t
e
y
stem. This re
s
geometries, i
n
o
nally graded f
a
E
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mous. “Natio
n
towers res
e
a
m, Reyner.
Th
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M
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e
n
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e
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glazing syst
e
t
he blinds from
h
e energy effici
u
nctionally gr
a
e
cts to the syst
n
al function
a
e
cts a building
e
n validated t
h
e
chnique has
b
s
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h
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an attempt
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çade system.
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al library stir
s
e
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e
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e
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u
i
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t
u
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n
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d
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i
d
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0
e
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e
graded façade
c
explicit repre
s
m
inant functio
n
e
a functionall
y
programmati
c
e
transitions a
r
by space an
d
e
m that integr
a
“one-dimensi
o
ency of the sy
s
a
ded layered
g
em including
a
a
nd external
a
s function and
h
rough compu
t
b
een develope
d
h
er explore va
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s
dissent in
P
o
ks.” The Gaz
e
e
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p
gineered tran
s
2
009: 42.
s
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o
B
uilding Servi
c
u
al AM10. Lon
t
ectural Revie
w
efficient stru
c
o
logy and Su
s
H
erde. “The
m
d
ing
s
39 (2007
of an exteri
o
i
lding
s
46 (201
f
construction.
B
n
sparency in a
r
z
, Vladimir B
l
building fac
0
02.
e
d shading d
e
575.
c
oncept applied
s
entation of its
n
imposes a
y
graded faça
d
c
building fun
c
r
e also meant
d
technical p
e
a
tes a shading
o
nal functione
d
s
tem, but also
p
g
lass system”
a
wide variety
o
a
ppearance t
h
performance
r
t
er simulation
d
which is ca
p
rious geometri
optimize the
P
aris: Architec
t
e
tte, 25 01 199
p
ered environ
m
s
parency. New
o
rmance Buildi
n
c
e Engineers.
N
don: Chartere
d
w
1304 (2005):
c
turally integr
a
s
tainable Indu
s
m
ost efficient
p
)
: 367-373.
o
r shading d
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Neveu, Mark J. “Mehrdad Hadighi, Tsz Yan Ng Lafayette 148 Headquarters.” Domus no.958, 1 5 2012: 112-
113.
Oxman, Neri. “Variable property rapid prototyping.” Virtual and physical prototyping, 2011: 3-31.
Philips, Ian. “Cities of light.” Interior Design, 2004: 162-169.
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09 2013.
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AG, 2007.
... (Figure 2) The geometric grading responds to and reflects the internal layout of the building on a macro scale. (Emami and Giles [3]) This study looks at the structural performance of a sample composite glass beam (considered as one strip of the glass panel), through structural simulation and experimental study. It studies how different glass types, namely annealed and tempered glass, fail under loading. ...
... (2) Beam stiffness for glass-acrylic beam: K glass-acrylic composite= 80% K all-glass = 5000*0.8 = 4444 (3) For Ansys results: K Ansys= P/d = 500/0.35 = 1430 N/mm (4) For experimental tests: K Experiments= P/d = 500/ 1.67 = 299 N/mm (5) Looking at the results, there is a huge difference between hand calculations and the other results. ...
Conference Paper
Full-text available
This study is focused on an innovative passive integrated shading panel system for building envelopes, where the internal shading is formed out of core elements that are structurally layered between the two glass panes. The composite panel consists of two outer skins and an inner core, which are assembled by bonding the two skins to the intermediate core. The skins are relatively strong, stiff materials while the core is a less stiff material. This integrated composite panel system modulates daylighting through the shading panels in addition to providing increased structural efficiency, compared to a simple double glazed system.
... This provides the opportunity to change the perforation ratio of each module depending on the specific program of the space and the required daylighting levels of that space. [1] In addition, the screen wall has the potential to be more integrated with the main structure of the building by connecting to the slabs from top and bottom, in order to transfer structural loads to the ground. (Fig. 12) On top of this, the screen walls can change their role from shading screen to the main building facade, by placing the glass panes in the apertures instead of adding a layer to the glass envelope. ...
Conference Paper
Full-text available
Shading screens have been used as daylight control systems, which also play a role as design elements of transparent facades. A façade’s configuration can be an explicit representation of its functions. There are multiple functions within a building and sometimes a dominant function imposes one configuration to the whole system; in this case, a replicated geometry that is used for the shading screen. In contrast, by grading the screen’s geometry, there is a response to each individual programmatic function according to the interior space of the building.We propose a functionally graded shading system that responses to different programmatic building functions. In this study, some geometric patterns, widely used in Persian historical ornamentations, have been chosen as the underlying geometry for shading screens. Geometric ornamental patterns are based on mathematical concepts, which are implemented on regular shapes of a certain arrangement. In general, such configurations have three geometric characteristics that have raised the tendency of employing the geometric patterns in ornaments of shading screens, facades, floor finishing and windows of both historical and contemporary architecture. First, these patterns can be fitted on different surfaces through geometrical concepts such as propagation, curtailment and scaling. Second, most of these types of patterns are self-similar configurations that are roughly similar to one part of themselves. This characteristic assists in making use of the properties of fractal geometry in parametric design of the patterns and further modification of an arrangement and density of a typical configuration. Third, some different patterns are generally based upon the same underlying rules and can be generated using almost the same geometrical processing techniques. Considering the self-similarity characteristic of the patterns, some shading screens are designed in this study with some Persian geometric patterns and then they are evaluated regarding their daylighting and structural performance. In the daylighting performance evaluation phase, we look at the year around daylighting levels and light distribution of a regular office space, while the specified shading screen is installed in front of a transparent full floor to ceiling glass facade. It is assumed that by using the shading screen, the required lighting levels are being maintained, while the heat gain is being reduced. In addition, the designed patterns play a role as an architectural feature of the building. In the structural performance evaluation phase, the shading screens which are considered as exterior self-supporting systems are analyzed under their self-weight and wind loads. The goal is to reach a minimum weight for the screens that are performing structurally. Ultimately, the presented shading screens are based on Persian geometric ornamental patterns and arranged according to the lighting and structural requirements. Results are indicating a multi-disciplinary approach in the design of the shading screens, which can be employed in creating similar prototypes with different climatic and loading requirements.
Article
Additive prototyping technologies have become an efficient and common means to deliver geometrically precise functional prototypes in relatively short periods of time. Most such technologies, however, remain limited to producing single-material, constant-property prototypes from a restricted range of materials. Inspired by Nature, where form is characterized by heterogeneous compositions, the paper presents a novel approach to layered manufacturing entitled variable property rapid prototyping. VPRP introduces the ability to dynamically mix, grade and vary the ratios of material properties to produce functional components with continuous gradients, highly optimized to fit their performance with efficient use of materials, reduction of waste and production of highly customizable features with added functionalities. A novel software approach entitled Variable Property Modelling is presented allowing designers to create structural components defined by their desired material behaviour. Research methods are presented and design applications demonstrated. Current technological limitations and future directions are discussed and their implications reviewed.
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Summary There has been an alpine house at Kew since 1887. The first house was a traditional design that was in use for nearly a century. Subsequent alpine houses at Kew have been more radical in their design and helped raise the profile of Kew’s alpine collections. The latest, the innovative Davies Alpine House, opened in March 2006.
Mehrdad Hadighi, Tsz Yan Ng Lafayette 148 Headquarters
  • Mark J Neveu
Neveu, Mark J. "Mehrdad Hadighi, Tsz Yan Ng Lafayette 148 Headquarters." Domus no.958, 1 5 2012: 112-113.
Vinoly on the rise in London
  • Rob Sharp
Sharp, Rob. "Vinoly on the rise in London." The Architect, 2006: 12.
Lighting up London "fryscraper" draws crowd on hottest day
  • Chris Spillane
Spillane, Chris. "Lighting up London "fryscraper" draws crowd on hottest day." Pittsburgh post-Gazette, 06 09 2013.