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 Physic-Based Component Fragility Model for Near-Coast Residential Wood Building Subjected to Hurricane Wave and Surge
Tác giả hoặc Nhóm tác giả: Trung Q. Do, John W. van de Lindt, and Daniel T. Cox
Nơi đăng: Engineering Mechanics Institute Conference EMI-2018; Số: EMI-2018;Từ->đến trang: 1-2;Năm: 2018
Lĩnh vực: Khoa học; Loại: Báo cáo; Thể loại: Quốc tế
TÓM TẮT
Damage to near-coast structures such as residential wood buildings can be significant due to thecombination of wave and surge. The existing damage models for different type of buildingstructures due to flood and wave which are available in HAZUS-MH do not account for dynamichorizontal and vertical forces which results in an underestimation of the loss. This study developeda fragility methodology which is based on physical damage to residential wood buildingcomponents such as doors, windows, walls, and the floor system subjected to a combination ofhurricane wave and surge. The method to estimate horizontal and vertical forces on elevatedstructures using Computational Fluid Dynamics (CFD) was verified using the results of tests at theO.H. Hinsdale Wave Research Laboratory, Oregon State University. To illustrate the method ofcomponent fragility, two full-scale wood-frame residential building archetypes which representslab-on-grade and an elevated coastal structure for a typical coastal region of the United Stateswere then analyzed using the CFD model. The probability of failure for different damage stateswere then obtained under a range of possible combinations of waves and surge levels. Finally, lossanalysis and cost analysis were performed and compared to the loss model provide by HAZUSMHto show the advantage of applying the CFD model to predict damage for near-coast buildingsunder hurricane waves and surge, thereby including the effects of waves and surge velocity in thedamage modeling.
ABSTRACT
Damage to near-coast structures such as residential wood buildings can be significant due to thecombination of wave and surge. The existing damage models for different type of buildingstructures due to flood and wave which are available in HAZUS-MH do not account for dynamichorizontal and vertical forces which results in an underestimation of the loss. This study developeda fragility methodology which is based on physical damage to residential wood buildingcomponents such as doors, windows, walls, and the floor system subjected to a combination ofhurricane wave and surge. The method to estimate horizontal and vertical forces on elevatedstructures using Computational Fluid Dynamics (CFD) was verified using the results of tests at theO.H. Hinsdale Wave Research Laboratory, Oregon State University. To illustrate the method ofcomponent fragility, two full-scale wood-frame residential building archetypes which representslab-on-grade and an elevated coastal structure for a typical coastal region of the United Stateswere then analyzed using the CFD model. The probability of failure for different damage stateswere then obtained under a range of possible combinations of waves and surge levels. Finally, lossanalysis and cost analysis were performed and compared to the loss model provide by HAZUSMHto show the advantage of applying the CFD model to predict damage for near-coast buildingsunder hurricane waves and surge, thereby including the effects of waves and surge velocity in thedamage modeling.
[ emi 2018.pdf ]
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