SRC框架结构基于需求能力系数法的抗震性能评估

摘要

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 structural seismic performance named demand and capacity factor method ( DCFM) is introduced which consideres the uncertainty of seismic demand and structural capacity, and seismic performance evaluation steps for steel reinforced concrete ( SRC) structures are proposed. At last the DCFM is applied to a regular SRC frame structure, and its reliability levels satisfying different fortification objectives are all over 90% , which demonstrates whole performance of the structure is well with rare earthquake of 8 degree and it could satisfy the demand of all performance levels.