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原文传递 Combination Rules Used to Account for Orthogonal Seismic Effects: State-of-the-Art Review

题名：	Combination Rules Used to Account for Orthogonal Seismic Effects: State-of-the-Art Review
正文语种：	英文
作者：	Jianze Wang1; Henry V. Burton, M.ASCE2; Kaoshan Dai, A.M.ASCE3
作者单位：	1Ph.D. Candidate, State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji Univ., Shanghai 200092, China; presently, Visiting Graduate Researcher, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095. Email: 15wangjz@tongji.edu.cn 2Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Los Angeles, CA 90095. 3Professor, Dept. of Civil Engineering and Institute for Disaster Management and Reconstruction, Sichuan Univ., Chengdu 610065, China; State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji Univ., Shanghai 200092, China (corresponding author).
关键词：	Orthogonal seismic effect; Combination rules; Shared element; Torsional irregularity; Code and standard
摘要：	During an earthquake, buildings are simultaneously excited by multiple (horizontal and vertical) ground motion components. In the design process, the combinatorial effects of multicomponent horizontal loading are commonly determined using simplified methods such as the percentage (e.g., 100%–30%, 100%–40%) and square root sum of squares (SRSS) rules. In this paper, the state of the art in assessing the effectiveness of combination rules for orthogonal seismic effects is first reviewed. Prior studies are categorized based on the adopted analysis method (e.g., response spectrum versus response history), type of structural system, presence of structural irregularities, and considered demand parameters. A recent attempt to evaluate the combination studies using strong motion data is also discussed. Subsequently, the adoption of combination rules in popular codes and standards is presented and discussed including the conditions that trigger their implementation. Based on the review of prior research on the topic, it is concluded that the structural engineering community has not reached a consensus on the relative effectiveness of the various orthogonal combination methods. The paper concludes with a comprehensive discussion that covers specific challenges, knowledge gaps, and suggestions for future research.
出版年：	2019
期刊名称：	Journal of Structural Engineering
卷：	145
期：	11
页码：	1-13