RC框架结构抗震性能及评估方法的研究

Research on the seismic performance and evaluation method of RC frame structure

对结构进行多级地震作用下的抗震性能评估,能够揭示结构在地震作用下的行为反应和薄弱环节,提供更加优化的抗震性能设计和更加有针对性的加固改进方案.以多层和高层RC框架结构为例,分别采用Pushover分析方法和弹塑性动力时程分析方法对其进行"多遇、基本和罕遇"地震作用下的抗震性能评估.结果表明,Pushover分析与弹塑性动力时程分析所得抗震性能评估结果一致,基于抗震性能评估的工作量和精度需求的考量,推荐采用Pushover分析方法进行结构抗震性能评估.

The seismic performance evaluation of structure under multi-level earthquakes can reveal the seismic behaviors and weaknesses of the structure to provide a more optimized structural design and a more targeted reinforcement＇s scheme.This paper adopts Pushover analysis and elastic-plastic dynamic time history analysis to evaluate the seismic performance of a multistory RC frame structure and a high-rise RC frame structure under frequent earthquakes,basic earthquakes and rare earthquakes.The study shows that the evaluation result of Pushover analysis is consistent with elastic-plastic dynamic time history analysis.In consideration of the workload and the precision requirement of seismic performance evaluation,the Pushover analysis is recommended.