基于局部谱形状指标调整结构抗地震倒塌能力的预测结果  

Adjustment of the Predicted Results of the Collapse Resistance of Structures Based on Spectral Shape Index

作　　者：张磊[1] 许镇[2] 叶列平[1] 施炜[1] 陆新征[1] 

机构地区：[1]清华大学土木工程系,清华大学结构工程与振动教育部重点实验室,北京100084 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《工程抗震与加固改造》2016年第5期9-15,26,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(51378299);国家科技支撑计划课题(2013BAJ08B02)

摘　　要：选择合适的地震动记录是结构抗地震倒塌性能评估中很有挑战性的一个课题。如果对每个工程结构都根据其场地特点和结构特点选取一组地震动进行地震抗倒塌能力分析,则选波工作量和难度太大,难以在工程中广泛应用。因此,本文提出了局部反应谱形状指标SSI(spectral shape index),并给出了基于SSI的结构抗地震倒塌能力预测结果的调整方法,即通过一组标准的地震动记录对建筑进行倒塌分析,再将抗倒塌能力的结果根据建筑的目标反应谱进行调整,用调整后的结果来评价该建筑的抗倒塌能力。最后,通过3个典型的多层钢筋混凝土框架结构验证了该方法的可行性。One of the challenges of assessing structural collapse performance is the appropriate selection of ground motions in the nonlinear dynamic collapse simulation. If different ground motions are selected for each building according to the site condition and the structural characteristics,the workload of ground motion selection is unacceptable. Therefore,a new spectral shape index SSI is proposed to adjust the predicted results of collapse resistance of structures. Specifically,the collapse resistance of a building is assessed using a standard ground motion records. Then the predicted collapse capacities are adjusted based on the target response spectrum. At last,the feasibility of the proposed method is validated by 3 reinforced concrete frame structures.

关 键 词：单自由度 逐步增量时程分析 地震倒塌评估 反应谱形状指标 调整方法 

分 类 号：TU352.11[建筑科学—结构工程]