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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。
Based on the idea of rod-end multi-spring, the discrete element method is used to build a continuous collapse analysis model of RC frame structure. The spring-recovery hysteresis model is introduced for any loading path. The coupling effect between axial spring and shear spring is considered , Established a reasonable spring failure criterion, and dealt with the contact and collision after unit failure effectively. On the basis of this, a computer simulation program was developed for the collapse of plane frame structure. The example shows that the program developed in this paper can reflect the whole process of collapse and collapse of reinforced concrete frame structure more vividly.