Project

CONSECH20: CONSErvation of 20th century concrete Cultural Heritage in urban changing environments

Goal: CONSECH20 is an European Project supported by the JPI CH Heritage in Changing Environments programme that aims at developing innovative approaches for the conservation and protection of 20th cent. heritage concrete buildings against the ever-changing urban impacts, taking into account both technical and social aspects.

CONSECH20 focuses on constructions built with 20th cent. historic concrete (primarily until 1960) with social interest in the sense of bringing people together (e.g. for recreation, inhabiting, working) to strengthen the link between society and 20th cent. architectural heritage.

CONSECH20 objectives are:

(i) Increasing the potential of 20th cent. historic concrete cultural heritage as a promotion vector for social integration and cultural tourism,

(ii) Contributing to the establishment and development of the notion of Heritage Science, a relatively new and emerging field of science that aspires to bridge the gap between humanities and applied sciences,

(iii) Outlining new approaches to participatory monitoring and conservation/restoration for future use of modern architectural heritage by stakeholders, and

(iv) Outlining new approaches for citizen engagement in the protection of modern architectural heritage.

The Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences coordinates the project consortium composed of 5 partners: The Delft University of Technology, the University of Cyprus, the University of Genova, and the Institute of Sociology of the National Academy of Sciences of Belarus.

Date: 1 January 2019 - 1 December 2021

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Project log

Antroula Georgiou
added a research item
This presentation focuses on good and poor intervention practices adopted during the restoration of listed and non-listed historic concrete structures in Cyprus (Fig. 1), where the various repair and retrofit scenarios must include design for seismic events; this was not taken into consideration during the original design of historic concrete structures on the island, despite the fact that it is located in a seismic prone area. The interventions hereby presented (i.e., jacketing, complete replacement of reinforced concrete elements, confinement with metal parts, replacement of reinforcement cover with high performance grout material, addition of shear walls) have a construction age history span of ca. 20 years, thus allowing us to assess their performace in time and decide upon their efficiency and suitability for use in relevant restoration projects.
Antroula Georgiou
added a research item
Architectural heritage nowadays includes concrete structures constructed in the 20th century. These buildings are usually under-detailed, since the actual behavior of reinforced concrete at the time of their construction was not clearly understood, whilst building codes incorporating seismic resistance design, especially in seismic prone areas, did not exist. This inevitably led to inefficient design and consequently to severe damages in many historic concrete buildings during past seismic events. This paper explores the use of novel Engineered (Fiber Reinforced) Cementitious Composites (ECCs), with strain hardening abilities in tension, for the repair and strengthening of old sub-standard reinforced concrete columns, focusing on their confining and shear strengthening potentials. The experimental results show that, when replacing the reinforcement cover with fiber reinforced ECCs, the fibers bridge tensile cracks, limiting their opening and increasing their resistance against volumetric expansion, ultimately leading to increased amounts of energy dissipation. ECCs may thus by used in the repair of historic concrete structural elements.
Antroula Georgiou
added a research item
Monuments are buildings in which historical, archaeological and cultural values are displayed, yet their lack of seismic detailing and design renders them dangerous for public use and prone to collapse and permanent loss, especially in countries located in seismic zones. Furthermore, the existing European regulatory framework does not oblige the owners of such structures to assess and retrofit them against earthquakes, thus leading to dangerous user safety conditions and possible permanent loss of historic concrete structures in a seismic scenario. This paper examines one of the culturally significant historic concrete structures of Cyprus. It assesses the seismic capacity of the structure by means of comparing various analysis methods and highlights the urgent need for a new relevant regulatory framework regarding historic concrete structures. The results are used to formulate recommendations that should be incorporated in future regulations in order to protect both the users and the concrete heritage structures themselves.
Antroula Georgiou
added a research item
Toν Δεκέμβριο του 1961, o Δήμος Λεμεσού ζήτησε προσφορές για την ανέγερση Τουριστικού Κέντρου εντός του Δημοτικού Κήπου της πόλης. Το συγκεκριμένο έργο θεωρήθηκε ση-μαντικό, γιατί θα αποτελούσε χώρο συνάντησης και πολιτισμού, και θα χρησιμοποιείτο επί καθημερινής βάσης από τους πολίτες που θα επι-σκέπτονταν τον Δημοτικό Κήπο. Παράλληλα, ήταν μια προσπάθεια του Δήμου Λεμεσού να επεκτείνει το πολιτιστικό και τουριστικό του προϊόν. Η αρχιτεκτονική μελέτη του έργου ανατέθηκε στον νεαρό τότε αρχιτέκτονα Φοίβο Πολυδωρίδη, ο οποίος θεωρείται σήμερα ένας από τους σημαντι-κότερους εκπροσώπους του κυπριακού μοντερνισμού. Η στατική μελέτη έγινε από τον Χρ. Κακούτα, ενώ την ανέγερση ανέλαβε η εταιρεία CYBARCO. Σύμφωνα με τον αρχιτέκτονα του έργου, με τον σχεδιασμό του κτηρίου επι-χειρήθηκε η δημιουργία ενός χώρου που θα συνδύαζε πολιτιστικές εκδηλώ-σεις, όπως μουσικές συναυλίες, ένα εστιατόριο, καθώς και έναν χώρο φιλικό προς τα παιδιά και τις οικογένειες που θα επισκέπτονταν τον Δημοτικό Κήπο. Το κτήριο είναι επίμηκες, κοίλης κάτοψης. Το σχήμα του αναδεικνύεται από τους καμπυλωτούς θόλους και τις πέργολες, καθώς επίσης και από το υπερυψωμένο κέλυφος της οροφής, ενώ η περίμετρός του περικλεί-εται σχεδόν εξ ολοκλήρου από γυαλί, κάτι που δημιουργεί την ευκαιρία Κτήριο Μελέτης: Τουριστικό Κέντρο στον Δημοτικό Κήπο Λεμεσού σύνδεσης των εσωτερικών και των εξωτερικών χώρων. Οι πλάκες και τα κελύφη από οπλισμένο σκυρόδεμα στηρίζονται σε ελαφριές σωληνωτές χαλύβδινες κολώνες. Το κτήριο έχει δημοσιευτεί στο ελληνικό περιοδικό «Αρχιτεκτονική» το 1966 και έχει συμπεριληφθεί στον κατάλογο των 100 (πιο) σημαντικών κτηρίων, τοποθεσιών και γειτονιών, που καταρτίστηκε από το Εθνικό Μητρώο της Docomomo Κύπρου. Η ΚΑΤΑΣΤΑΣΗ ΣΗΜΕΡΑ Μετά από πολλά χρόνια λειτουργίας του, το Τουριστικό Κέντρο είναι σήμερα εγκαταλελειμμένο και σε κακή κατάσταση. Πέρα από τη σημα-ντική αρχιτεκτονική του αξία, το κτήριο αυτό, το οποίο αποτελεί μέρος της πολιτιστικής κληρονομιάς της Κύπρου, υπήρξε σημαντικός χώρος για την κοινωνία της Λεμεσού, για τη δημιουργία μνήμης και συνδεσης με τον τόπο και για την ενίσχυση των σχέσεων μεταξύ των χρηστών του.
Antroula Georgiou
added a research item
Monuments are buildings in which historical, archaeological and cultural values are displayed. The architectural heritage of a country is usually linked to vernacular buildings and large monumental structures. Historic reinforced concrete structures built in the 20th century are rarely listed as monuments, despite reflecting the past and usually displaying a multitude of values. The main problem with historic concrete structures is their lack of seismic detail-ing and design, which renders them dangerous for public use, and prone to collapse and permanent loss, especially in countries located in seismic zones. This paper examines one of the culturally significant historic concrete struc-tures of Cyprus, the Pedieos Post Office, located in Nicosia. The building is not currently listed; yet, it continues to serve the community since its con-struction in 1964. This paper assesses the seismic capacity of the structure by means of comparing various assessment analysis methods.
Antroula Georgiou
added a research item
The conservation of 20 th century concrete heritage structures poses a major challenge worldwide. Whilst these structures possess a remarkable architectural value and a rather experimental character in terms of the use of materials and technologies, at the same time there is admittedly lack of recognition of their cultural and historical value by the wide public. More often than not, such buildings are left to deteriorate and often they are even demolished. This paper follows the workings of the project "CONSErvation of 20 th century concrete Cultural Heritage in urban changing environments" (CONSECH20). The aforementioned international interdisciplinary project aims to investigate concrete constructions built until 1965 in four different European countries (Cyprus, Italy, The Netherlands and the Czech Republic), in terms of their architectural, social and historical value, and to address their restoration and re-use potential. The paper initially presents the significance of 20 th century concrete heritage structures in general, and describes the methodology proposed in order to ensure the protection of such buildings from demolition, and facilitate their restoration and re-use (if and where possible) for the benefit of the society. The focus is on the structural assessment and restoration of 20 th century concrete heritage buildings in Cyprus, following the methodologies described by modern codes for the assessment and retrofit of existing concrete structures. A new practical analysis approach is described and compared to the force-control approach of the pushover analysis of Eurocode 8:3, which significantly overestimates the demands for seismic upgrading. The two aforementioned approaches are examined for a specific case study concrete heritage building in Nicosia, Cyprus.
Gabriel Pardo Redondo
added a research item
Historic concrete buildings are at risk. Limited knowledge of concrete technology until the 1960s led to more sensitive buildings than modern concrete buildings. In addition, the lack of sensibility regarding their heritage value and insufficient protection is leading to remorseless demolition. Still, concrete has proved to be a resilient material that can last over a century with proper care. There is not yet an estimation of the status of historic concrete buildings in Europe. Until now, a few attempts have been done to secondarily, and subjectively, gauge their conservation status. This paper is the result of a joint investigation studying forty-eight historic concrete buildings distributed in four countries. They were surveyed by expert teams according to a predefined methodology. The study aims to identify recurrent damages and parameters affecting the conservation state. It also aims to serve as the first trial for an objective and measurable methodology, to apply it with a statistically significant number of cases. Damages related to the corrosion of reinforcement and moisture-related processes were the most recurrent. The use of plasters, flat roofs, and structural façade walls show a positive effect in protecting the concrete. The state of conservation has a great variability across countries.
Antroula Georgiou
added a research item
Architectural heritage nowadays includes non-vernacular concrete structures constructed in the €th century. These buildings are usually under-detailed, since the actual behavior of reinforced concrete at the time of their constructionwas not clearly understood. Additionally, the lack of Codes incorporating seismic resistance design, especially in seismic prone areas, when early concrete buildings were constructed, has led to their inefficient design and consequently to severe damages in many of them during past seismic events. This paper explores the use of novel Engineered (Fiber Reinforced) Cementitious Composites (ECCs), with strain hardening abilities in tension, for the repair and strengthening of old sub-standard reinforced concrete columns, focusing on their confining and shear strengthening potentials. The experimental results show that, when replacing the reinforcement cover with fiber reinforced ECCs, the fibers bridge tensile cracks, limiting their opening and increasing their resistance against volumetric expansion, ultimately leading to increased amounts of energy dissipation.
Private Profile
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CONSECH20 Newsletter 01 - April 2020 [Italian and English versions]
 
Antroula Georgiou
added a research item
Η αρχιτεκτονική κληρονομιά της κάθε χώρας περιλαμβάνει τόσο μεμονωμένα κτήρια, όσο και σύνολα κτηρίων, τα οποία αποτελούν «μνημεία» με την ευρύτερη έννοια του όρου, δηλαδή κατασκευές στις οποίες αποδίδονται ιστορικές, αρχαιολογικές, αισθητικές και άλλες αξίες. Η έννοια της αρχιτεκτονικής κληρονομιάς δεν πρέπει να περιορίζεται μόνο στα μεγάλα και σημαντικά μνημεία, αλλά πρέπει να επεκτείνεται, έτσι ώστε να καλύπτει κάθε κατασκευή που αποτελεί δείγμα της οικοδομικής δραστηριότητας του παρελθόντος. Η προστασία της αρχιτεκτονικής κληρονομιάς περιλαμβάνει τη διατήρηση και τη συντήρηση των μνημείων, μέσω της διαφύλαξης όσο το δυνατό περισσοτέρων από τις αξίες που αυτά περιέχουν.
Antroula Georgiou
added a research item
Even though restoration norms for normal concrete and masonry structures are prescribed in existing international codes, the rehabilitation, conservation and protection of 20 th century concrete heritage buildings is still a major challenge. The remarkable architectural, material and technological variety of these buildings and the lack of recognition of their cultural and historical value has often led to their abandonment and irreparable damage through the adoption of poor conservation practices. This research focuses on a representative case study of an early concrete building (Old Municipal Market) in Nicosia, Cyprus. The building is considered a typical example of Modern Architectural Heritage, with important social history and use. The study aims at the selection of appropriate techniques for the collection of data, simulation, evaluation and testing for the assessment of the structural capacity of the structure. A new practical analysis approach is used that examines the seismic response of the structure by comparing drift capacities with a possible earthquake deformations envelope. Of crucial significance in maintaining the architectural design of such important Modernity structures, is to assess their overall capacity, minimizing the required repairs; thus, the importance of taking under consideration the true pushover curve of the structure is highlighted through this study.
Antroula Georgiou
added a research item
Για την αποτίμηση υφιστάμενων κατασκευών οπλισμένου σκυροδέματος (O/Σ) που σχεδιάστηκαν πριν την εισαγωγή των σύγχρονων αντισεισμικών διατάξεων στους κανονισμούς, ή σε περιπτώσεις μή ύπαρξης κανονιστικών διατάξεων, έχουν αναπτυχθεί διάφοροι κανονισμοί παγκοσμίως [1-8]. Στην ειδική περίπτωση ιστορικών κατασκευών Ο/Σ, οι οποίες ορίζονται ως διατηρητέες, όχι μόνο λόγω της σημαντικότητας χρήσης τους, αλλά και λόγω της αρχιτεκτονικής μορφής τους, το επίπεδο επιτελεστικότητας που χρησιμοποιείται για την αποτίμηση και ενίσχυσή τους διαφέρει, και πρέπει να μελετάται κατά περίπτωση. Αναλόγως με την αρχή διατήρησης, το ιδιοκτησιακό καθεστώς και τους χρήστες, μια ιστορική κατασκευή Ο/Σ μπορεί να ελέγχεται για επίπεδα ασφάλειας κανονικών κατασκευών, υψηλότερες στάθμες ασφάλειας εαν έχει υψηλή κοινωνική αξία, χαμηλότερα επίπεδα επιτελεστικότητας για να μην καταστραφεί η μορφή λόγω επεμβάσεων ενίσχυσης, ή υψηλότερα επίπεδα επιτελεστικότητας για να μειωθούν οι επεμβάσεις
Stefano Francesco Musso
added 2 research items
In spite of the great number of methods and techniques forthe analysis and restoration of ancient buildings, practical instruments for a correct management in theredevelopment of old towns are still lacking. Working aspart of the Siena Master Plan, under Mr. B. Secchi's coordination, the Authore have applied methods aimed to givethe urban planner a real opportunity for directing futuretransformations. The main target has been to define thesubject of interest: the building, conceived as an“individual” that can be indentified primarily by itestructure and peculiar technological and morphologicalelements. The structure is identified using a “structurallattice”, a symbolic representation of the structuralelements of the building. The technological andmorphological elements are all those aspects (connected tothe type and use of materials) and details whichconstitute a construction solution producing peculiaraesthetic effects. What was previously a method ofanalysis eventually becomes the identification ofinvariable elements, fixing the “tolerance” limits forchanges occurring in cases of rehabilitation of an ancientbuilding. The final result has been the drawing up of twoguidebooks for the identification and classification ofthe invariable elements, both structural andtechnological: a practical “user's manual” which can beapplied in specific cases, rather than a generaldefinition of “what cannot be done”.
Il manuale si pone l'obbiettivo di contribuire alla definizione di linee guida per il recupero dell'architettura di base storico-tradizionale. Vengono trattati una serie di argomenti tra cui: i processi territoriali di formazione e trasformazione del patrimonio storico, l'articolazione spaziale della casa storica, i caratteri e gli elementi della fabbrica edilizia, linnee guide per il recupero delle diverse forme di degrado in atto.
Cristiana Lara Nunes
added a project goal
CONSECH20 is an European Project supported by the JPI CH Heritage in Changing Environments programme that aims at developing innovative approaches for the conservation and protection of 20th cent. heritage concrete buildings against the ever-changing urban impacts, taking into account both technical and social aspects.
CONSECH20 focuses on constructions built with 20th cent. historic concrete (primarily until 1960) with social interest in the sense of bringing people together (e.g. for recreation, inhabiting, working) to strengthen the link between society and 20th cent. architectural heritage.
CONSECH20 objectives are:
(i) Increasing the potential of 20th cent. historic concrete cultural heritage as a promotion vector for social integration and cultural tourism,
(ii) Contributing to the establishment and development of the notion of Heritage Science, a relatively new and emerging field of science that aspires to bridge the gap between humanities and applied sciences,
(iii) Outlining new approaches to participatory monitoring and conservation/restoration for future use of modern architectural heritage by stakeholders, and
(iv) Outlining new approaches for citizen engagement in the protection of modern architectural heritage.
The Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences coordinates the project consortium composed of 5 partners: The Delft University of Technology, the University of Cyprus, the University of Genova, and the Institute of Sociology of the National Academy of Sciences of Belarus.