【摘要】 基于杆端多弹簧的思想,运用离散单元法对钢筋混凝土框架结构搭建连续性倒塌分析模型,引入适用于任意加载路径的弹簧恢复力滞回模型,考虑了轴向弹簧与剪切弹簧的耦合效应,建立了合理的弹簧破坏准则,并对单元失效后的接触碰撞进行了有效的处理,在此基础上编制了平面框架结构连续性倒塌的计算机仿真程序。算例表明,本文开发的程序可以较为逼真地反映钢筋混凝土框架结构的倒塌破坏全过程。更多还原

【Abstract】 In this paper,a discrete element model for the progressive collapse simulation of RC frame structures is constructed based on the Segment-Multi-Spring Model,by introducing the restoring force models for the connected springs which can be used for the arbitrary loading path,defining the reasonable failure criteria of the springs in which the coupled effect of axis spring and shear spring is taken into account,and considering the contact-impact problem between discrete elements.Example shows that the simulation program developed based on the new model can realistically simulate the progressive collapse process of RC structures.更多还原