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 Development of Physics-Based Building Fragility Surfaces for Near-Coast Community Modeling
Tác giả hoặc Nhóm tác giả: Trung Q. Do, Tori Tomiczek, John W. van de Lindt, and Daniel T. Cox
Nơi đăng: The 2017 4th International Conference on Coastal and Ocean Engineering (ICCOE 2017); Số: 1;Từ->đến trang: 57-57;Năm: 2017
Lĩnh vực: Khoa học công nghệ; Loại: Báo cáo; Thể loại: Quốc tế
TÓM TẮT
A method for developing fragility surfaces for elevated near-coast residentialbuildings which can be used for performance-based design has been proposed. Fragilitysurfaces explain the probability of exceeding some predefined levels of performance (damagestates) of structures under a combination of hazard variables such as typhoon waves and surge.First, the closed-form numerical method for generating random shallow water waves from atarget wave spectrum and the distribution type is presented. A full scale simulation of wavesimpacting elevated buildings was performed using ANSYS-Fluent to determine the uplift andshear force on structures. Five damage states with correlating load capacities have beendefined. Damage state definitions were based on the potential for re-occupancy and structuralintegrity of the elevated building. The fragility methodology was then explored to illustratethe ability to select from various design options (combinations of clearance height andcapacity) to obtain a target probability of failure for a specified hurricane sea state. Anillustrative example for the design of near-coast buildings based on a target failure probabilitydemonstrates how the concepts presented herein could be applied for the performance-baseddesign of near-coast structures in typhoon-prone regions, essentially providing arisk-informed strategy for buildings along the coastline.
ABSTRACT
A method for developing fragility surfaces for elevated near-coast residentialbuildings which can be used for performance-based design has been proposed. Fragilitysurfaces explain the probability of exceeding some predefined levels of performance (damagestates) of structures under a combination of hazard variables such as typhoon waves and surge.First, the closed-form numerical method for generating random shallow water waves from atarget wave spectrum and the distribution type is presented. A full scale simulation of wavesimpacting elevated buildings was performed using ANSYS-Fluent to determine the uplift andshear force on structures. Five damage states with correlating load capacities have beendefined. Damage state definitions were based on the potential for re-occupancy and structuralintegrity of the elevated building. The fragility methodology was then explored to illustratethe ability to select from various design options (combinations of clearance height andcapacity) to obtain a target probability of failure for a specified hurricane sea state. Anillustrative example for the design of near-coast buildings based on a target failure probabilitydemonstrates how the concepts presented herein could be applied for the performance-baseddesign of near-coast structures in typhoon-prone regions, essentially providing arisk-informed strategy for buildings along the coastline.
[ 2017\2017m04d04_0_48_1ICCOE2017_Abstract-TrungDo.pdf ]
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