- 摘 要
-
(1 中国石油大学(华东)储运与建筑工程学院, 青岛 266580; 2 上海大学, 上海 200444;
3 中国石油大学(华东)理学院, 青岛 266580; 4 天津大学建筑工程学院, 天津 300072)
[摘要]结构在突发灾害作用下,通常引起局部构件的直接破坏,并进一步导致整体结构破坏、倒塌。这种倒塌破坏模式称为连续倒塌,其破坏模式十分复杂,具有动力性、非线性、不确定性等特点。本文应用大型动态数值计算模拟软件ANSYS/LS-DYNA,模拟框架结构的倒塌全过程。分析平面框架及空间框架结构在倒塌过程中不同的失效模式,研究不同失效区域下的倒塌的情况及堆积范围、应力最大点等问题的分析。同时,实现结构的载荷传递路径以及内力重分布的可视化,从而可以为实际工程结构的倒塌预防与控制提供一定的理论基础。
[关键词]连续倒塌; LS-DYNA; 数值模拟; 倒塌机理
中图分类号: TU311.4 文献标识码: A文章编号: 1002-848X(2016)S1-0363-04
Numerical simulation of structure progressive collapse process using LS-DYNA
Lin Hong1, Xu Kangning2, Yang Lei3, Zhu Benrui4, Li Ping1, Zhang Yu1
(1 College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China;
2 Shanghai University, Shanghai 200444, China;
3 College of Science, China University of Petroleum, Qingdao 266580, China;
4 School of Civil Engineering, Tianjin University, Tianjin 300072, China)
Abstract: The structure is usually confronted with kinds of emergencies, which may cause a local component direct damage and even result in a final collapse of the overall structure. This collapse mode is called progressive collapse, showing significant dynamic property, nonlinearity, and uncertainty. In this paper, the ANSYS/LS-DANA is used to simulate the progressive collapse process of frame structure. Different collapse failure modes of plane and space frame structure are analyzed, so as to investigate the collapse state, debris area and maximum stress point. Further, through the numerical simulation, the load transferring paths and internal force redistribution process can be visualized which will be great help to avoid progressive collapse of the frame structure.
Keywords: progressive collapse; LS-DYNA; numerical simulation; collapse mechanism
作者简介: 林红,博士,副教授,Email:linhong_ly@126.com。
*国家自然科学基金项目(51209218,51509184),青岛市应用基础研究计划项目(青年专项) (14-2-4-58-jch),中央高校基本科研业务费专项资金(15CX05003A,15CX05065A)。