（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］基于ABAQUS对采用不同钢筋和混凝土单轴本构模型的钢筋混凝土框架结构在大震作用下的连续倒塌数值模拟进行了比较研究。采用纤维梁单元模拟框架梁和柱，壳单元模拟钢筋混凝土楼板。分别编制了两种可用于模拟纤维梁单元失效的混凝土和钢筋单轴本构的用户子程序，考虑了钢筋混凝土楼板的刚度削弱、单元失效与接触。对某钢筋混凝土框架结构采用4组不同本构关系的计算结果进行了详细比较，结果表明不同材料模型得到的倒塌初始状态及初步发展趋势是一致的。

［关键词］框架结构; 连续倒塌; 地震作用; 数值模拟

中图分类号：TU375.4      文献标识码：A      文章编号：1002-848X(2014)14-0081-05

Comparative research on progressive collapse simulation of reinforced concrete frame structure subjected to the earthquake action

Ge Dongdong, Wan Jinguo, Zhou Zhongfa, Li Wenfeng, Miao Qisong

 (Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract: Using different uniaxial constitutive models of rebar and concrete, a comparative research on progressive collapse simulation of reinforced concrete frame structure subjected to the rare earthquake was carried out on the basis of ABAQUS software. Beams and columns of frame structure were modeled by fiber beam element, and reinforced concrete slab was simulated by shell element. Two uniaxial constitutive models of concrete and rebar were incorporated into user subroutines respectively, which were used to simulate the death and birth of the fiber beam element. Stiffness degradation, element failure and contact were also considered for reinforced concrete slab. Take a reinforced concrete frame structure as example, analysis results by means of four different constitutive relationships were compared in detail. The comparative results show that initial collapse state and initial development trend from different material models are consistent.

Keywords: frame structure; progressive collapse; earthquake action; numerical simulation

作者简介：閤东东，博士，高级工程师，一级注册结构工程师，Email：gddhust@gmail.com。

参考文献

［1］易伟建, 何庆锋, 肖岩．钢筋混凝土框架结构抗倒塌性能的试验研究［J］．建筑结构学报, 2007, 28(5): 104-109．

［2］MEHRDAD SASANI, MARLON BAZAN, SERKAN SAGIROGLU．Exprimental and analytical progressive collapse evaluation of actual reinforced concrete structure ［J］．ACI Structural Journal, 2007, 104(6): 731-739．

［3］陆新征,林旭川,叶列平，等.地震下高层建筑连续倒塌数值模型研究［J］．工程力学, 2010, 27(11): 64-70.

［4］梁益, 陆新征, 李易，等．三层RC框架的抗连续倒塌设计［J］．解放军理工大学学报：自然科学版, 2007, 8(6): 659-664.

［5］陆新征, 李易, 叶列平. 混凝土结构防连续倒塌理论与设计方法研究［M］. 北京：中国建筑工业出版社，2011.

［6］LU XIAO, LU XINZHENG, ZHANG WAN KAI, et al. Collapse simulation of a super high-rise building subjected to extremely strong earthquakes［J］．Science China Technological Sciences, 2011, 54(10): 2549-2560.

［7］LU XIAO, LU XINZHENG, GUAN HONG, et al. Collapse simulation of reinforced concrete high-rise building induced by extreme earthquakes ［J］．Earthquake Engineering & Structural Dynamics, 2013, 42(5): 705-723.

［8］潘鹏, 钱稼茹, 周怡斌，等. 上海科技宇航有限公司大修机库弹塑性时程分析［J］. 建筑结构, 2009,39(10): 15-18.

［9］閤东东, 万金国, 潘鹏，等. 纤维梁单元模型中钢筋模拟方法对比研究［J］．建筑结构, 2013,43(2): 60-62.

［10］GB 50010—2010 混凝土结构设计规范［S］. 北京: 中国建筑工业出版社，2011.