钢筋混凝土框架结构动力失效研究

Dynamic Failure for Reinforced Concrete Frame Structures

分析了强震作用下结构动力失效的机理以及预报结构的倒塌和确定结构的安全系数 ,根据非线性动力模型编制了NDAP(结构非线性动力分析 )程序来分析钢筋混凝土框架结构在强震作用下的反应 ,通过对框架结构的塑性铰形成过程的计算机模拟 ,分析了框架结构非线性动力失效的机制 。

Dynamic failure process of RC frame structures is analyzed in order to predict the collapse of a structure and determine the safety coefficient of the building. The nonlinear dynamic model is proposed and corresponding parameters are determined. The nonlinear dynamic analysis program NDAP is compiled according to the model and applied to calculating the dynamic response of RC frame under earthquake. The process of plastic hinge generation is simulated and some other dynamic characteristics are discussed. Finally, the second order effect ( P Δ effect) on dynamic failure is investigated through an example of RC frame under EL CENTRO wave, and the results shows that the second order effect is one of the key factors to lead to the failure of the structure and to predict the collapse of whole building.