平面框架连续性倒塌的全过程模拟

英文篇名：Progressive Collapse Simulation of Reinforced Concrete Frame Structures
中文刊名：建筑科学
英文刊名：Building Science
作者：吴翔天
英文作者：WU Xiang-tian(School of Civil Engineering ; Xi'an University of Science & Technology ; Xi'an 710054 ; China)
中文关键词：离散单元法 ; 连续性倒塌 ; 破坏准则 ; 仿真程序
英文关键词：discrete element method ; progressive collapse ; failure criterion ; simulation program
出版日期：2012-09-20
机构：西安科技大学土木工程学院;
年：2012
期：09
出版单位：建筑科学

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。
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.

引文

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