多层钢筋混凝土框架结构地震倒塌破坏分析.doc

文档介绍：
多层钢筋混凝土框架结构地震倒塌破坏分
析#
高佳明,刘伯权,付国**
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(长安大学建筑工程学院,西安 710061)
摘要:多层钢筋混凝土框架结构在我国的建筑结构中占有相当大的比例,在历次特大地震中
多层框架结构的倒塌破坏情况十分严重,已经成为威胁人民生命财产安全的重大问题,因此
研究结构的倒塌破坏规律和准确定义结构的倒塌破坏临界状态是非常有必要的。本文着眼于
结构的整体倒塌破坏规律,以各层等刚度的多层钢筋混凝土框架结构为研究对象,以层高、
跨度和层数为研究变量,应用非线性有限元软件 ANSYS/LS-DYNA,以弹塑性时程分析法
为基础,研究了等刚度 RC 框架结构塑性集中变形的发展规律、层间位移角与倒塌破坏的关
系。
关键词:倒塌;ANSYS/LS-DYNA;破坏域模型;层间位移角;可变机构
中图分类号:
Analysis for Collapse Process of Multi-layer RC Frame
Structures under Earthquake
GAO Jiaming, LIU Boquan, FU Guo
(School of Civil Engineering, Chang'an University,Xi'an 710061)
Abstract: Multi-storey RC-frame structure occupies a large proportion of the building structure in
our country, the collapse of multi-storey frame structure in great earthquake is very serious, and it
has e a major threat to people's life and property security, so research of the rule about
structural collapse and define the critical state of structural collapse accurately is necessary. This
paper focuses on the rule of structural collapse, takes constant stiffness multi-layer RC-frame
structure as the object of study, with height, span and number of floors as the variables, uses
nonlinear finite element software ANSYS/LS-DYNA, bases on elasto-plastic time history analysis,
studies the rule of plastic deformation’s development of constant stiffness multi-layer RC-frame
structure, and t