基于能力谱法的桥墩横向抗震性能评价

The Evaluation of Lateral Seismic Performance for Piers Based on Capacity Spectrum Method

非线性时程分析被认为是地震响应分析的最准确的方法,但是技术复杂、计算工作量大,而Pushover分析概念简单,计算简便,并能有效地评估结构的抗震性能,近年来应用越来越广泛。介绍了Pushover分析的基本理论、假定和实施过程,采用能力谱方法评价实际工程中桥墩的抗震性能。算例分析结果可为同类桥梁抗震设计提供参考。

Although nonlinear time-history analysis is considered as the most accurate method for seismic response analysis, the technology is complex with large computing workload. Conversely, Pushover analysis has simple concept and computation and is able to effectively evaluate the seismic performance of the structure, which has been widely used in recent years. This paper introduced the basic theory, hypothesis and implementation process of Pushover analysis, and adopted capacity spectrum method to evaluate the seismic performance of piers in the actual engineering. The results of calculating-examples analysis could be taken as reference for the seismic design of similar bridges.