RC框架结构超强系数与地震经济损失风险分析

基于现行的中国抗震设计规范，设计了6个不同参数的钢筋混凝土框架结构模型，利用静力弹塑性（Pushover）分析方法求得各个框架结构的超强系数；同时，利用基于性能的抗震设计（PBSD）的方法，通过增量动力分析（IDA）、易损性分析和地震损失风险分析等，定量的求出各个框架结构的经济损失风险，并比较了不同框架结构超强系数和经济损失风险的变化情况。结果表明:在层高相同的情况下，当抗震设防烈度逐渐增大时，超强系数减小，经济损失风险逐渐增大；在抗震设防烈度相同的情况下，当层高增大时，超强系数减小，经济损失风险逐渐增大。

Analysis on overstrength factor and earthquake economic loss risk of reinforced concrete frame structures

Based on the current seismic design code, six reinforced concrete frame structures with different parameters were designed. The overstrength factor of each structure was calculated by static elastoplastic method (Pushover Analysis). Meanwhile, according to the performance-based seismic design (PBSD) method, the economic loss risk of each frame structure is quantified through incremental dynamic analysis (IDA), fragility analysis and seismic loss analysis.. The variation of overstrength factor and economic loss in different frame structures was analyzed. The results indicate that the economic loss risk increases and overstrength factor decreases with the increase of fortification intensity for structures with the same height, and the economic loss risk increases and overstrength factor decreases with the increase of the height for the same fortification intensity.