SRC框架结构基于需求能力系数法的抗震性能评估

Seismic Performance Evaluation for SRC Frame Structures based on Demand and Capacity Factor Method

介绍了增量动力分析(IDA)方法的原理和特点,在此基础上,分析了考虑地震需求和结构能力不确定性的抗震性能评估方法——需求能力系数法,并提出用其评估型钢混凝土(SRC)结构抗震性能的具体过程。以一规则SRC框架结构为例,通过IDA分析曲线得到其达到不同设防目标的可靠等级均为90%以上,这表明结构在8度罕震作用下的整体性能良好,能满足各性能水准的要求。

Based on incremental dynamic analysis（IDA） pricinples,a method for evaluating s tructural seismic performance named demand and capacity factor method（DCFM） is introduced which consideres the uncertainty of seismic demand and structural cap acity,and seismic performance evaluation steps for steel reinforced concrete（S RC） structures are proposed.At last the DCFM is applied to a regular SRC frame s tructure,and its reliability levels satisfying different fortification objective s are all over 90%,which demonstrates whole performance of the structure is wel l with rare earthquake of 8 degree and it could satisfy the demand of all perfor mance levels.