The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Wensu Chen - One of the best experts on this subject based on the ideXlab platform.
-
laboratory test and numerical study of structural insulated panel strengthened with glass fibre laminate against Windborne debris impact
Construction and Building Materials, 2016Co-Authors: Qing Fei Meng, Hong Hao, Wensu ChenAbstract:Abstract Cyclone and tornado as common nature disasters have caused devastating damages and losses around the world. In such events loose objects might be lifted and propelled by strong Wind as the Windborne debris, which is a potential hazard to the building facade because Windborne debris impact may create openings on the building envelop, threaten the safety of occupants inside the building and cause further damages to the structure. Some Wind Loading codes e.g., the Australian Wind Loading Code (AS/NZS 1170:2:2011) specifies the design requirements to address this issue. On the other hand, structural insulated panel (SIP) has been increasingly used in building constructions owing to the advantages of thermal insulation and easy to build, but it is vulnerable to Windborne debris impact owing to its insufficient impact resistance capacity. This disadvantage prevents the wide applications of SIP in regions with strong Winds, such as the Cyclone region C and D defined in Australian Wind Loading Code. In this study, glass fibre laminate was used to strengthen SIP with OSB (Oriented Strand Board) skins to improve its capacity to resist Windborne debris impact. One unstrengthened and six strengthened SIP panels were manufactured and tested by using a pneumatic cannon system. Two high speed cameras were used to capture failure modes and dynamic responses. The effectiveness of glass fibre laminate strengthening was examined and compared in terms of the residual velocity of the projectile. A numerical model was also developed to simulate the laboratory tests. The accuracy of the model was calibrated by the test results. The validated numerical model was then used to conduct more numerical simulations to obtain vulnerability curves of OSB skin SIP panels against Windborne debris impact.
-
experimental and numerical study of basalt fibre cloth strengthened structural insulated panel under Windborne debris impact
Journal of Reinforced Plastics and Composites, 2016Co-Authors: Qing Fei Meng, Wensu ChenAbstract:Strong Wind causes damages and losses around the world. The Windborne debris carried by strong Wind might impact on building and create openings on the building envelop, which might threaten the occupants and cause further damages to the building. To address this issue, some Wind Loading codes including the Australian Wind Loading Code (AS/NZS 1170:2:2011) give design requirements. The resistance capacity of oriented strand board skins structural insulated panel was investigated and proved having low resistance to the projectile impact, and could not meet the impact resistance requirement for application in cyclonic region C and D defined in Australian Wind Loading Code. In this study, basalt fibre cloth is used to strengthen oriented strand board structural insulated panel to increase its capacity to resist Windborne debris impact. This paper presents experimental and numerical study of structural insulated panel with or without basalt fibre cloth strengthening under Windborne debris impact. Five specime...
-
experimental and numerical study of composite lightweight structural insulated panel with expanded polystyrene core against Windborne debris impacts
Materials & Design, 2014Co-Authors: Wensu Chen, Hong HaoAbstract:Abstract Natural disasters such as cyclone, hurricane, tornado and typhoon cause tremendous loss around the world. The Windborne debris usually imposes high speed localized impact on the building envelope, which may harm people inside the building and create dominant openings. A dominant opening in the building envelope might cause internal pressure increasing and result in substantial damage to the building structures, such as roof lifting up or even collapse. To withstand the impact of such extreme event, the penetration resistant capacity of wall or roof panels to Windborne debris impact should meet the requirements specified in the Wind Loading codes, e.g., the Australian Wind Loading Code (AS/NZS 1170.2:2011). In this study, a composite Structural Insulated Panel (SIP) with Extended Polystyrene (EPS) core sandwiched by flat metal skins that is commonly used in building industry was investigated. To study the structural response and penetration resistant capacity of the composite panel against Windborne debris impacts, a series of laboratory tests were carried out by using a pneumatic cannon testing system. The effects of various specimen configurations, impact locations and debris impact velocities on their performance were investigated. The failure modes under various projectile impact scenarios were observed and compared by using two high-speed cameras. The dynamic responses were examined quantitatively in terms of the opening size, residual velocity of projectile, deformation and strain time histories on the back skin measured in the tests. The penetration resistance capacity of the panels subjected to Windborne debris impact were examined and analyzed. In addition, numerical models were developed in LS-DYNA to simulate the response and damage of the composite SIP under Windborne debris impact. Laboratory tested panels were first modeled. The test data was used to calibrate the accuracy of the numerical model. The validated numerical model was then used to conduct more numerical simulations to obtain more results such as energy absorption, impact force and vulnerability curve of the SIP against Windborne debris impact.
Hong Hao - One of the best experts on this subject based on the ideXlab platform.
-
laboratory test and numerical study of structural insulated panel strengthened with glass fibre laminate against Windborne debris impact
Construction and Building Materials, 2016Co-Authors: Qing Fei Meng, Hong Hao, Wensu ChenAbstract:Abstract Cyclone and tornado as common nature disasters have caused devastating damages and losses around the world. In such events loose objects might be lifted and propelled by strong Wind as the Windborne debris, which is a potential hazard to the building facade because Windborne debris impact may create openings on the building envelop, threaten the safety of occupants inside the building and cause further damages to the structure. Some Wind Loading codes e.g., the Australian Wind Loading Code (AS/NZS 1170:2:2011) specifies the design requirements to address this issue. On the other hand, structural insulated panel (SIP) has been increasingly used in building constructions owing to the advantages of thermal insulation and easy to build, but it is vulnerable to Windborne debris impact owing to its insufficient impact resistance capacity. This disadvantage prevents the wide applications of SIP in regions with strong Winds, such as the Cyclone region C and D defined in Australian Wind Loading Code. In this study, glass fibre laminate was used to strengthen SIP with OSB (Oriented Strand Board) skins to improve its capacity to resist Windborne debris impact. One unstrengthened and six strengthened SIP panels were manufactured and tested by using a pneumatic cannon system. Two high speed cameras were used to capture failure modes and dynamic responses. The effectiveness of glass fibre laminate strengthening was examined and compared in terms of the residual velocity of the projectile. A numerical model was also developed to simulate the laboratory tests. The accuracy of the model was calibrated by the test results. The validated numerical model was then used to conduct more numerical simulations to obtain vulnerability curves of OSB skin SIP panels against Windborne debris impact.
-
experimental and numerical study of composite lightweight structural insulated panel with expanded polystyrene core against Windborne debris impacts
Materials & Design, 2014Co-Authors: Wensu Chen, Hong HaoAbstract:Abstract Natural disasters such as cyclone, hurricane, tornado and typhoon cause tremendous loss around the world. The Windborne debris usually imposes high speed localized impact on the building envelope, which may harm people inside the building and create dominant openings. A dominant opening in the building envelope might cause internal pressure increasing and result in substantial damage to the building structures, such as roof lifting up or even collapse. To withstand the impact of such extreme event, the penetration resistant capacity of wall or roof panels to Windborne debris impact should meet the requirements specified in the Wind Loading codes, e.g., the Australian Wind Loading Code (AS/NZS 1170.2:2011). In this study, a composite Structural Insulated Panel (SIP) with Extended Polystyrene (EPS) core sandwiched by flat metal skins that is commonly used in building industry was investigated. To study the structural response and penetration resistant capacity of the composite panel against Windborne debris impacts, a series of laboratory tests were carried out by using a pneumatic cannon testing system. The effects of various specimen configurations, impact locations and debris impact velocities on their performance were investigated. The failure modes under various projectile impact scenarios were observed and compared by using two high-speed cameras. The dynamic responses were examined quantitatively in terms of the opening size, residual velocity of projectile, deformation and strain time histories on the back skin measured in the tests. The penetration resistance capacity of the panels subjected to Windborne debris impact were examined and analyzed. In addition, numerical models were developed in LS-DYNA to simulate the response and damage of the composite SIP under Windborne debris impact. Laboratory tested panels were first modeled. The test data was used to calibrate the accuracy of the numerical model. The validated numerical model was then used to conduct more numerical simulations to obtain more results such as energy absorption, impact force and vulnerability curve of the SIP against Windborne debris impact.
Ahsan Kareem - One of the best experts on this subject based on the ideXlab platform.
-
comparative study of major international Wind codes and standards for Wind effects on tall buildings
Engineering Structures, 2013Co-Authors: Dae Kun Kwon, Ahsan KareemAbstract:Abstract Globalization of construction industry, burgeoning growth of tall buildings, and the recent focus on the development of unified international codes/standards has increased the need to better understand the underlying commonalities and differences among the major international Wind Loading codes/standards, which are also constantly being revised and updated. To address this need, a comprehensive comparison of Wind loads and their effects on tall buildings is conducted utilizing eight major international codes/standards: ASCE 2010 (USA), AS/NZ 2011 (Australia and New Zealand), AIJ 2004 (Japan), CNS 2012 (China), NBCC 2010 (Canada), Eurocode 2010 (Europe), ISO 2009 and IWC 2012 (India). The key areas of comparison include the provisions for survivability design as well as the serviceability requirements in the alongWind and acrossWind directions. As most codes/standards utilize a common theoretical framework for modeling dynamic load effects, basic equations here are recast in a general format in order to compare the influence of individual parameters on the overall recommendations of codes/standards.
-
equivalent static Wind loads on buildings new model
Journal of Structural Engineering-asce, 2004Co-Authors: Xinzhong Chen, Ahsan KareemAbstract:In current design practice, spatiotemporally varying Wind loads on buildings are modeled as equivalent static Wind loads. This Loading description serves as pivotal information for estimating response under the combined action of Wind and other loads. This paper presents a framework for evaluating the equivalent static Wind load for any given peak response of buildings with uncoupled responses in the three primary directions. A new description of the background Loading based on the gust Loading envelope/peak dynamic Loading is presented. The resonant Loading is expressed in terms of the inertial load following the respective fundamental structural mode. The equivalent static Wind Loading for the total peak response is then expressed as a linear combination of the background and resonant components. Following this framework, closed-form formulations using an analytical Wind Loading model are presented. The gust response factors and the equivalent static Wind loads for various alongWind response components ...
Wagdi G Habashi - One of the best experts on this subject based on the ideXlab platform.
-
dynamic analysis of an overhead transmission line subject to gusty Wind Loading predicted by Wind conductor interaction
Computers & Structures, 2013Co-Authors: Hooman Keyhan, Ghyslaine Mcclure, Wagdi G HabashiAbstract:The authors present a new method to determine Wind Loading on transmission line conductors based on fluid-structure interaction (FSI) analysis. FSI results yield a more accurate representation of pressure loads acting on moving conductors than provided by the pseudo-static pressure calculation based on Bernoulli's equation, which is the current approach used in design. The results based on the proposed method are compared to those obtained using the Bernoulli load model using four natural Wind records to perform a nonlinear dynamic analysis of a three-span transmission line section. The quasi-static approach significantly overestimates the conductor motion and the cable tensions.
Anjan Dutta - One of the best experts on this subject based on the ideXlab platform.
-
multi modal vibration control of truss bridges with tuned mass dampers under general Loading
Journal of Vibration and Control, 2016Co-Authors: N Debnath, Sajal K Deb, Anjan DuttaAbstract:Applications of tuned mass damper (TMD) systems for bridge structures are observed for mitigation of problem related to excessive vibration induced by either Wind Loading or vehicle Loading, where ...
