基于两种分析方法的五层RC框架抗连续倒塌分析

Analysis of Continuous Collapse Resistance of Five-story RC Frame Based on Two Analysis Methods

基于线性静力和非线性动力两种方法使用SAP2000对5层框架进行连续倒塌仿真分析,分析其抗倒塌能力,并比较两种方法下的拆除构件的位移值与弯矩值。结果表明,使用线性静力分析方法时,DCR≤2,满足抗连续倒塌要求。使用非线性动力分析方法时,拆除角柱的最大位移值为0.0156 m,拆除长边中柱的最大位移值为0.0195 m,都没有达到构件破坏的最大位移值,满足要求,根据对比两种分析方法的具体数值发现,线性静力分析方法较保守,计算速度快,非线性动力分析方法准确地反映了结构的动力响应。

Based on linear static method and nonlinear dynamic method,the continuous collapse of 5-story frame is simulated by SAP2000,and the collapse resistance of the frame is analyzed.The results show that DCR≤2 can meet the requirements of continuous collapse resistance when linear static analysis method is used.When using the nonlinear dynamic analysis method,the maximum displacement value of demolishing the corner column is 0.0156 m,and that of demolishing the long side central column is 0.0195 m,both of them fail to reach the maximum displacement value of the failure of the member and meet the requirements,it is found that the linear static analysis method is more conservative,the calculation speed is faster,and the nonlinear dynamic analysis method accurately reflects the dynamic response of the structure.