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Life-Cycle Cost Analysis of a Point-Like Structure Subjected to Tornadic Wind Loads
| 题名： | Life-Cycle Cost Analysis of a Point-Like Structure Subjected to Tornadic Wind Loads |
| 正文语种： | 英文 |
| 作者： | Viet Le, S.M.ASCE;Luca Caracoglia, M.ASCE |
| 作者单位： | Northeastern Univ |
| 关键词： | Tornado simulation; Performance-based wind engineering; Fragility analysis; Life-cycle cost analysis; Point-like structure |
| 摘要： | To quantify the monetary losses associated with damages induced by tornado wind storms, a numerical performance-based engineering framework complete with dynamic simulation of tomado-like wind fields, calculation of probabilities of structural performance for a point-like (monopole) structure and life-cycle cost analysis is presented. Within a Monte Carlo sampling environment, digitally simulated loads generated from five distinct tornado wind field models replicate aleatory and epistemic uncertainties concentrated in the aerodynamic load coefficients and turbulent wind velocities. Using random maximum displacements and base-bending moments as engineering demand parameters, the convolution of fragility functions with hazard curves for three intensity measures (maximum tangential velocity, core radius of the simulated tornado, and starting location of the tornado) yield probabilities of structural failure for selected limit states. The shapes of the integrand probability surfaces and the subsequent estimations of relative costs exhibit significant differences among the five models despite the parametrically equivalent simulations. This initial study, though limited through its case analysis of a point-like (monopole) structure, sets the stage for future investigations of life-cycle costs for other vertical structures (e.g., tall buildings) subjected to tomadic wind loads. |
| 出版日期： | 2020 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.146 |
| 期： | No.02 |
| 页码： | 04019194 |
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