Ioannis Zisis

Ioannis Zisis
Florida International University | FIU · Department of Civil and Environmental Engineering

Ph.D. in Building Engineering

About

83
Publications
19,560
Reads
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400
Citations
Introduction
Dr. Zisis has expertise in structural and environmental wind engineering and in particular the wind effects on the built environment. He has been involved in several experimental research projects and he has gained significant experience in small- to full-scale testing, as well as structural monitoring of instrumented buildings.
Additional affiliations
August 2018 - present
Florida International University
Position
  • Professor (Associate)
September 2012 - August 2018
Florida International University
Position
  • Professor (Assistant)
September 2004 - September 2011
Concordia University Montreal
Position
  • Research Assistant
Education
January 2007 - August 2011
Concordia University Montreal
Field of study
  • Wind Engineering

Publications

Publications (83)
Article
Wind-induced loads on canopies attached to low-rise buildings have been investigated in the past and formed the basis for design recommendations in the latest wind standards and building codes of practice. The scope of this study was to extend the investigation to canopies that are attached to taller buildings and generate additional recommendation...
Article
Asphalt shingles constitute more than 80% of the roofing materials in current residential housing in the United States. Many post-disaster surveys have reported the failure of these roofing elements below the design level wind event. Research to realistically model the aerodynamics of asphalt shingles at full-scale is limited, resulting in knowledg...
Article
Full-text available
Machine learning (ML) techniques, which are a subset of artificial intelligence (AI), have played a crucial role across a wide spectrum of disciplines, including engineering, over the last decades. The promise of using ML is due to its ability to learn from given data, identify patterns, and accordingly make decisions or predictions without being s...
Presentation
Full-text available
Roof overhangs are an unenclosed continuation of the roof surface that may be open or covered by a soffit. Most common construction practices appear to suggest that overhangs extend no more than 2 ft, whereas in some areas (e.g. Florida), overhangs are often much wider. These extended overhangs are often used to improve house energy efficiency and...
Conference Paper
Full-text available
Wind tunnels are powerful tools when studying wind-structure interaction problems. The design and construction of a new atmospheric boundary layer wind tunnel involves various assumptions and intricacies depending on the wind-field requirements, and spatial, budgetary, and technological constraints. This paper describes the process involved in the...
Article
Hurricanes are a main cause of economic losses in the world, including Florida. They affect exterior, interior, and the contents of residential buildings. The interior damage can be as much as half of the cost of total damage, but the estimation of the interior damage is still somewhat crude. Most damage models estimate interior damage as a percent...
Article
Full-text available
Span-wire traffic signals are vulnerable to extreme wind events such as hurricanes and thunderstorms. In past events in the Southeastern Coast of the United States, many failures of span-wire traffic signals were reported. In order to identify their dynamic behavior during extreme wind events and investigate their buffeting response, a large-scale...
Article
Posthurricane surveys have shown that building interior damage often results from water intrusion into the building interior. The interior damage can make up 50%–100% of the total building loss; therefore, its accurate evaluation and quantification are necessary for estimation of hurricane losses. In this research, water propagation into a building...
Conference Paper
Full-text available
Span-wire traffic signals are vulnerable to extreme wind events such as hurricanes and thunderstorms. In past events in the Southeastern Coast of the United States, many failures of span-wire traffic signals were reported. In order to identify their dynamic behavior during extreme wind events and investigate their buffeting response, large-scale ae...
Conference Paper
Full-text available
Wind Driven Rain (WDR) intrusion through existing defects and wind-induced breaches is one of the major causes of building interior damages during hurricane events. These damages can result in considerable monetary loss, which in some cases can make up 50% to 100% of the total sustained loss by the building. Despite the detrimental effects of water...
Conference Paper
Full-text available
Hurricanes are a main cause of economic losses in many parts of the world, including the state of Florida. They affect the exterior, interior, and the contents of residential buildings. The damage of the interior can be as much as half of the total damage, but the estimation of the interior damage is still somewhat crude. Most damage models estimat...
Article
This paper aims to investigate linear and nonlinear behavior of beams subjected to externally applied partially distributed follower forces. In this investigation, the nonlinear composite beam theory of Hodges is used. The system of nonlinear equations is linearized about the equilibrium, or rest structure state, and the linear system is solved num...
Article
Full-text available
Coastal areas of the US are affected by extreme wind events, including hurricanes. Roofs are the most vulnerable building components as they are often damaged by high wind uplift forces acting on the edges and corners. This study investigates the application of a mitigation strategy, in the form of an Aerodynamics Mitigation and Power System (AMPS)...
Conference Paper
Hurricane Irma made its first landfall in the continental U.S. at Cudjoe Key in southern Florida on September 10, 2017, with Category 4 winds. Irma made its second landfall later that afternoon on Marco Island on Florida’s Gulf Coast, as a Category 3 storm, weakening further as it moved north. Reconnaissance teams respectively dedicated to the Gulf...
Conference Paper
Full-text available
Hurricane Irma made its first landfall in the continental US at Cudjoe Key in southern Florida on September 10, 2017, with Category 4 winds. Irma made its second landfall later that afternoon on Marco Island on Florida’s Gulf Coast, as a Category 3 storm, weakening further as it moved north. Reconnaissance teams respectively dedicated to the Gulf...
Conference Paper
Full-text available
Roofing is the most vulnerable part of a low rise building as it is often damaged in high winds that produce high suctions or uplift forces on the edges and corners. This study investigates the application of a smart mitigation strategy, in the form of an Aerodynamic Mitigation and Power Production System (AMPS) (the United States Patent Applicatio...
Conference Paper
Full-text available
Extreme winds are a major cause for the failure of span wire traffic signals; extensive failures for those traffic light systems were reported during past hurricane events in South Florida. To investigate their buffeting response, a large-scale aero-elastic testing was conducted at the 12-Fan Wall of Wind Experimental Facility (WOW) at Florida Inte...
Article
Failures of roofing systems occur due to high local suctions on tiles or shingles, or because of a different failure mechanism triggered by high local wind velocities near the roof surface. In the latter case, the local velocity can induce positive pressures on the lip of a windward facing shingle or tile, which are transmitted underneath, adding t...
Article
Variable message sign (VMS) systems are widely used in motorways to provide traffic information to motorists. Such systems are subjected to wind-induced structural vibration that can lead to damage due to fatigue. The limited information that is available on the safe wind design of VMS motivated a large scale testing that was conducted at the wall...
Article
Full-text available
The vast application of rooftop photovoltaic (PV) panel arrays on residential buildings has increased the importance for reliable and efficient design of racking systems. Adequate design guidelines assure proper function of the system as well as safety implications on the surroundings during extreme wind events. During such events, the distributed...
Article
Full-scale experiments were conducted to investigate wind loading on roof tiles in hip, ridge, and perimeter locations, identified from past storms as main points of damage initiation. The objectives were to: (i) provide test-based data on wind-induced loads for tiles, and (ii) evaluate characteristics of near-surface flows to assess tile loading m...
Article
Given the significant role of internal pressures in the wind-induced loading of low-rise buildings, their correct estimation is critical for the accurate determination of the net (external plus internal) wind effects. This paper presents results of an investigation conducted to study the effect of wind-induced internal pressures on structural frame...
Conference Paper
Full-text available
Many residential buildings located close to coastal areas have balconies that are used by the building occupants for recreational purposes. However, during past hurricane events wind induced damage to buildings with balconies have caused losses worth millions of dollars. Due to limited information available in codes and standards on the safe design...
Article
Engineering research is undergoing dramatic changes with novel, large-scale research facilities being developed to help reduce the growing economic losses associated with natural disasters. The wall of wind (WOW), at Florida International University (FIU), is such an experimental facility, capable of simulating hurricane winds and wind-driven rain...
Article
Full-text available
Wind-induced damage to multi-layer building wall systems, such as systems with vinyl siding, is common, especially in hurricane-prone areas. Wind load distribution through these multi layered walls and the amount of load reduction due to pressure equalization is expressed through pressure equalization factors (PEFs). The ASTM D3679 standard suggest...
Conference Paper
Wind-induced effects on buildings and infrastructure located in coastal areas of USA have caused damages worth millions of dollars. To develop wind damage mitigation technique and carry out research on various topics of wind engineering, a state-of-the-art large scale experimental facility -- the Wall of Wind (WOW) -- was developed at Florida Inter...
Article
Full-text available
Canopies attached to residential and other buildings are predominantly lightweight structures with both surfaces exposed to the wind; therefore, their design is mostly governed by wind-induced loads. Currently, only limited information exists for the design of attached canopies against wind action in building codes and wind standards, which justifi...
Conference Paper
Full-text available
Balconies are an essential component of most residential buildings that can be damaged due to wind speeds exceeding 150 mph in hurricane prone areas. Limited information on the safe wind design of balconies is available in standards and codes. This paper presents results from an experimental study carried out at the Wall of Wind (WOW) experimental...
Conference Paper
Full-text available
The roof of a building is vulnerable to wind induced structural damage, especially in hurricane affected areas of the USA. Building roofs comprise of roofing elements, such as tiles/shingles exposed to strong winds can experience uplift forces that can cause significant damage to these elements. Building standards, such as ASCE 7-10 provides peak p...
Conference Paper
Full-text available
The building roof is one of the most vulnerable building elements to wind induced damage during a hurricane. It is common practice in Florida buildings to be fitted with ‘vents with louvers’ that have the mechanism to automatically close during high wind speeds (> 10 m/s) in order to prevent entry of water, while remaining open at all other times....
Conference Paper
Full-text available
The roof is the most vulnerable part of a low rise building as it is often affected in the event of high winds that produce high suctions or uplift forces on the edges and corners. This study investigates the application of an active mitigation strategy, in the form of an Active Aerodynamics Mitigation and Power Production System (AMPS) (United Sta...
Conference Paper
Current knowledge regarding wind-induced pressures on attached canopies and sunrooms is restricted to a limited number of studies. As a result, most wind standards and codes of practice do not provide guidelines for the design of such components. This study aims at expanding current knowledge by providing a better understanding of the behavior of p...
Conference Paper
Considering the fast propagation of solar energy utilization in residential buildings, the necessity of safe and economical Photovoltaic (PV) systems is perceived more than ever. To design safe and cost-efficient PV arrays and racking systems, a deep understanding of environmental impact on these components is required. One of the most important en...
Conference Paper
Full-text available
The interest on renewable energy has significantly increased the use of photovoltaic (PV) panels on low-rise buildings. According to the US Department of Energy SunShot Initiative studies, balance of system (BOS) costs account for about half of the total PV system cost and need to be reduced by 72–80% in order to achieve the program goals. One of t...
Technical Report
Full-text available
Current knowledge regarding wind-induced pressures on solar panels installed on residential roofs is restricted to a limited number of studies. Most wind standards and codes of practice do not provide guidelines for the design of such components. This study aims at expanding current knowledge by providing a better understanding of the behavior of w...
Article
A wind tunnel study was performed to examine wind loads on canopies attached to the walls of low-rise buildings. A model of a building with an attached canopy of geometric scale of 1∶100 was constructed and tested in a simulated open terrain exposure. The attached canopy model was equipped with pressure taps at both upper and lower surfaces to allo...
Article
This paper reports on an experimental study carried out to better understand the wind pressure distribution on stand-alone panel surfaces and panels attached to flat building roofs. A complex model capable to incorporate solar panels at different locations and various inclinations was constructed at a 1:200 geometric scale. Three model panels equip...
Conference Paper
Building envelopes are designed using the wind load provisions of building codes and standards and, in the case of large buildings, wind tunnel tests. Mock-up tests such as those of ASTM are applied to representative portions of the envelope to test the robustness of the system. The level of reliability provided by these methods is only truly teste...
Conference Paper
A critical aspect on the successful design of timber buildings is the continuous load path. The uninterrupted transfer of the wind-induced load from the exterior surface (envelope) of the structure to the trusses and walls and finally to the foundation is critical to their structural resiliency. A consortium of Canadian Universities carried out a l...
Conference Paper
This paper presents a method for assessing the integrated energy performance of passive and active building envelope systems combined with lighting and thermal controls in perimeter building zones. A coupled thermal and lighting model, based on a finite difference thermal network approach is solved implicitly to predict indoor environmental conditi...
Conference Paper
A detailed wind tunnel study was carried out to examine the effect of various parameters on wind-induced loads on photovoltaic panels. A complex model capable to incorporate solar panels at different locations and various inclinations was constructed at a 1:200 geometric scale. Three model panels equipped with pressure taps on both surfaces (36 in...
Conference Paper
The increased interest on renewable energy resources had a direct effect on the use of solar collectors and photovoltaics (PV) on residential and other structures. Current building codes and design standards offer little assistance to the designers regarding provisions for wind-induced loading. The scope of this paper is to address the wind-induced...
Conference Paper
A low-rise wood building equipped with pressure and force-monitoring equipment was used to study the wind-induced response during strong wind events. The main interest in this study was to examine the wind load path, i.e. how the dynamic wind load is transferred through the building superstructure and down to the foundation. By investigating the lo...
Conference Paper
A full-scale wind and structural monitoring project was initiated to examine the wind-induced load paths on low-rise wood buildings. Wind and load monitoring information, collected through various instruments installed on the weather towers and the test building, had to be verified before proceeding with a more detailed analysis and interpretation....
Conference Paper
Solar collector or photovoltaic (PV) systems placed on building roofs have been used extensively in recent years. These systems are sensitive to wind loading but design standards and codes of practice offer little assistance to the designers regarding provisions for wind-induced loading. The paper reports on a detailed literature survey, which has...
Conference Paper
The paper reports the results of an experimental study aiming at evaluating the effectiveness of various windbreak configurations consisting of porous walls of various heights, lengths and porosities placed in the vicinity of truck loading area in the back of a large commercial warehouse building. The experiments were performed in a boundary layer...
Article
Several studies have been carried out on the evaluation of wind-induced pressures on building envelopes. However, there is very limited research on wind-induced forces on the main structural elements of a building including its foundation. Thus, a full-scale monitoring research project was initiated to examine the wind-induced structural forces for...
Article
The wind-induced response of low-rise wood buildings has been evaluated by monitoring a specially instrumented test building exposed to real wind action. The field facilities included a state-of-the-art data acquisition system which collected wind, pressure and force data. In addition to the field monitoring, a 1:200 scaled model of the test buildi...
Conference Paper
Full-scale structural monitoring of a low-rise wood light-frame building subjected to wind actions was used to evaluate structural wind load transfer mechanisms through its superstructure and into the foundation. The building is equipped with forty wall and roof pressure taps and thirty-three roof and foundation load cells. Attachment of the supers...
Article
A wind tunnel study has been carried out to assess wind loads on patio covers attached to low-rise buildings. A 1:100 geometric scale building and patio cover model was constructed and tested for open exposure conditions. The patio cover model was instrumented with pressure taps on both top and bottom surfaces, allowing the simultaneous measurement...
Article
Full-text available
Structural monitoring of an instrumented experimental single-storey wood building provided important information regarding the behaviour and response of low-rise buildings subjected to wind loads. Foundation wind-induced loads were captured by twenty-seven three-dimensional load cells simultaneously with the envelope pressures and weather character...
Conference Paper
A significant amount of casualties and losses have been associated with recent and past strong wind events on urban habitat construction. Post-disaster damage assessments reveal the severity and in several cases fatal consequences of such phenomena. The discipline of wind engineering has invested a substantial amount of time and effort towards a be...
Conference Paper
An experimental test house has been constructed in Fredericton (NB, Canada) and both envelope pressures and its wind-induced structural response have been monitored during the last three years. In addition, a 1:200-scaled model of the house was tested at the boundary layer wind tunnel of Concordia University. Acquired field data have been analyzed...
Conference Paper
Proceedings of the 2009 Structures Congress, held in Austin, Texas, April 30-May 2, 2009. Sponsored by the Structural Engineering Institute of ASCE. This collection contains 316 papers that offer information from research and practice in more than 100 technical sessions including: design and analysis of bridges; historic bridge preservation; struct...
Conference Paper
Wind-induced pressures for the design of components and cladding, as well as primary structural systems of rigid buildings are calculated by using provisions of ASCE 7 [ASCE/SEI 7-05, 2006] or the National Building Code of Canada [NBCC 2005] depending on the building roof shape and location. In general, these pressures are the product of a dynamic...
Article
A test building was constructed in Fredericton, New Brunswick and was used to collect pressure and force coefficient data. A 1:200 scale model was also fabricated and tested for a total of 15 angles of wind attack at the Building Aerodynamics Laboratory of Concordia University. Mean and peak local and area-averaged pressure coefficients were measur...