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Are seismic losses affected by the angle of seismic incidence?
Bulletin of Earthquake Engineering ( IF 4.6 ) Pub Date : 2021-05-20 , DOI: 10.1007/s10518-021-01121-0
Despoina Skoulidou , Xavier Romão

The proposed study examines the propagation of uncertainty associated with the angle of seismic incidence of a group of ground motions, as well as to that of the ground motion group size, to the expected seismic loss estimates of reinforced concrete buildings. Six buildings with infilled frame systems are studied, representative of non-seismically designed structures typical of southern European practice. Their monetary losses are computed using a performance-based earthquake engineering framework, which integrates the site-specific seismic hazard, structural response, damage to building components and contents, and the resulting costs (repair, demolition, reconstruction). To estimate monetary losses, an inventory of the structural and non-structural elements is compiled and existing damage and cost data/functions are employed. Seismic loss estimates account for both the probability of collapse and the probability of demolition as a result of excessive residual storey drifts. Multiple stripe analysis is performed for this purpose using numerical models capable of simulating the relevant limit states up to collapse. Results are presented in terms of expected losses conditional on the ground motion intensity and expected annual losses, which are determined by integrating the former with the seismic hazard curve of the site. Results show that the comparative effect of the ground motion group size in the expected annual losses is much more important when compared to that of the angle of seismic incidence, whose influence is shown to be less significant and mostly concentrated on the variability of the results.



中文翻译:

地震损失受地震入射角影响吗?

拟议的研究检查了与一组地震动的地震入射角以及地震动组大小的震荡角相关的不确定性的传播,以估计钢筋混凝土建筑物的预期地震损失。研究了六座带有填充框架系统的建筑物,这些建筑物代表了南欧实践中典型的非抗震设计结构。他们的金钱损失是使用基于性能的地震工程框架计算的,该框架综合了特定地点的地震危害,结构响应,对建筑物组件和内容物的损坏以及所产生的成本(维修,拆除,重建)。为了估算金钱损失,编制了结构和非结构要素的清单,并使用了现有的损坏和成本数据/功能。地震损失估计值说明了由于过多的剩余楼层漂移而导致的倒塌和拆除的可能性。为此,使用能够模拟相关极限状态直至崩溃的数值模型执行多条分析。结果以预期的损失表示,该损失取决于地面运动强度和年度预期损失,这些损失是通过将前者与现场的地震危险性曲线相结合而确定的。结果表明,与地震入射角相比,地震动群大小在预期年度损失中的比较效果要重要得多,地震入射角的影响被证明不那么显着,并且主要集中在结果的可变性上。

更新日期:2021-05-22
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