Significance of multi-hazard risk in design of buildings under earthquake and wind loads
Significance of multi-hazard risk in design of buildings under earthquake and wind loads
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DOI：
10.1016/j.engstruct.2021.112623
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发表时间：
2021-06-09
影响因子：
5.5
通讯作者：
Kim, Hyun-Su
中科院分区：
文献类型：
--
作者：
Kwag, Shinyoung;Gupta, Abhinav;Kim, Hyun-Su
传统上，在建筑物的设计中，通过相关设计规范和标准中规定的各种荷载组合来考虑外部危险。通常情况下，设计受给定地理位置的单一主要危险的控制。对于地震和风灾尤其如此，这两种灾害都会对结构施加随时间变化的动态载荷。然而，工程师可能想知道，针对两种主要危险之一而设计的建筑是否能够令人满意地抵御另一种危险。先前的研究表明，在某些情况下，当建筑物针对单一主要危险而设计时，它不一定能提供令人满意的针对其他危险的性能。在本文中，我们提出了一种新颖的框架，该框架建立在基于性能的设计要求的基础上，并确定建筑物的设计主要受单一危险还是多种危险的控制。它将取决于场地的危险特性与给定建筑类型和建筑几何形状的性能标准相结合。该框架与概率风险评估的新兴领域一致，但可以轻松扩展到传统的、确定性特征的设计要求，如此处所示。
Traditionally, external hazards are considered in the design of a building through the various combinations of loads prescribed in relevant design codes and standards. It is often the case that the design is governed by a single dominant hazard at a given geographic location. This is particularly true for earthquake and wind hazards, both of which impart time-dependent dynamic loads on the structure. Engineers may nevertheless wonder if a building designed for one of the two dominant hazards will satisfactorily withstand the other. Prior studies have indicated that in some cases, when a building is designed for a single dominant hazard, it does not necessarily provide satisfactory performance against the other hazard. In this paper, we propose a novel framework that builds upon performance-based design requirements and determines whether the design of a building is governed primarily by a single hazard or multiple hazards. It integrates site-dependent hazard characteristics with the performance criteria for a given building type and building geometry. The framework is consistent with the burgeoning area of probabilistic risk assessment, and yet can easily be extended to traditional, deterministically characterized design requirements as illustrated herein.