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Integrating expected loss and collapse risk in performance-based seismic design of structures
Bulletin of Earthquake Engineering ( IF 4.6 ) Pub Date : 2021-01-03 , DOI: 10.1007/s10518-020-01003-x
Davit Shahnazaryan , Gerard J. O’Reilly

With the introduction of performance-based earthquake engineering (PBEE), engineers have strived to relate building performance to different seismic hazard levels. Expected annual loss (EAL) and collapse safety described by mean annual frequency of collapse (MAFC) have become employed more frequently, but tend to be limited to seismic assessment rather than design. This article outlines an integrated performance-based seismic design (IPBSD) method that uses EAL and MAFC as design parameters. With these, as opposed to conventional intensity-based strength and/or drift requirements, IPBSD limits expected monetary losses and maintains a sufficient and quantifiable level of collapse safety in buildings. Through simple procedures, it directly identifies feasible structural solutions without the need for detailed calculations and numerical analysis. This article outlines its implementation alongside other contemporary risk-targeted and code-based approaches. Several case study reinforced concrete frame structures are evaluated using these approaches and the results appraised via verification analysis. The agreement and consistency of the design solutions and the intended targets are evaluated to demonstrate the suitability of each method. The proposed framework is viewed as a stepping stone for seismic design with advanced performance objectives in line with modern PBEE requirements.



中文翻译:

在基于性能的结构抗震设计中整合预期损失和坍塌风险

随着基于性能的地震工程(PBEE)的引入,工程师们努力将建筑物的性能与不同的地震危险等级联系起来。预期的年损失(EAL)和以平均年崩溃频率(MAFC)来描述的崩溃安全已越来越频繁地使用,但往往仅限于地震评估而非设计。本文概述了一种综合的基于性能的抗震设计(IPBSD)方法,该方法使用EAL和MAFC作为设计参数。有了这些,与传统的基于强度的强度和/或漂移要求相反,IBPSD限制了预期的金钱损失,并保持了建筑物中倒塌安全性的足够和可量化的水平。通过简单的程序,它可以直接确定可行的结构解决方案,而无需进行详细的计算和数值分析。本文概述了其实现以及其他当代针对风险和基于代码的方法。使用这些方法评估了几个案例研究的钢筋混凝土框架结构,并通过验证分析对结果进行了评估。评估设计解决方案与预期目标的一致性和一致性,以证明每种方法的适用性。所提出的框架被视为抗震设计的垫脚石,其性能目标符合现代PBEE要求。评估设计解决方案与预期目标的一致性和一致性,以证明每种方法的适用性。所提出的框架被视为抗震设计的垫脚石,其性能目标符合现代PBEE要求。评估设计解决方案与预期目标的一致性和一致性,以证明每种方法的适用性。所提出的框架被视为抗震设计的垫脚石,其性能目标符合现代PBEE要求。

更新日期:2021-01-03
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