影响RC框架结构抗地震倒塌能力的因素研究

Seismic Collapse Resistance Influencing Factors of RC Frame Structures

基于有限元方法,采用"纤维梁模型+分层壳"模型,用增量动力时程方法,对RC框架结构抗地震倒塌能力的因素进行研究,可以得到如下结论:设计时尽量降低框架柱的最大轴压比,做到结构层间抗侧刚度均匀;并对多个设计模型比较,找到最优的最大层间位移角,使得结构设计的承载力、刚度、延性达到最佳匹配,增大倒塌储备系数C_(cmr),达到提高抗地震倒塌能力的目的。

The collapse of structures is an important earthquakes disaster. Analyzing reasons and damage process of typical structures could lead to new aseismatic measures and improve the overall structure of the ability to resist collapse. Based on the finite element method and fiber beam and layered shell model,by adopting incremental dynamic analysis method,the seismic collapse resistance influencing factors of the RC frame structure was revealed. The conclusions are the maximum axial compression ratio of frame column should be reduced,the maximum interlayer displacement angle should be determined which could make the structure design of the bearing capacity,stiffness,ductility achieve the best match,increasing the CMR collapsed reserve coefficient and achieve the goal of improving the ability to resist earthquake collapse.