- 摘 要
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（北京市建筑設計研究院有限公司， 北京 100045）
［摘要］基于ABAQUS對采用不同鋼筋和混凝土單軸本構模型的鋼筋混凝土框架結構在大震作用下的連續(xù)倒塌數(shù)值模擬進行了比較研究。采用纖維梁單元模擬框架梁和柱，殼單元模擬鋼筋混凝土樓板。分別編制了兩種可用于模擬纖維梁單元失效的混凝土和鋼筋單軸本構的用戶子程序，考慮了鋼筋混凝土樓板的剛度削弱、單元失效與接觸。對某鋼筋混凝土框架結構采用4組不同本構關系的計算結果進行了詳細比較，結果表明不同材料模型得到的倒塌初始狀態(tài)及初步發(fā)展趨勢是一致的。
［關鍵詞］框架結構; 連續(xù)倒塌; 地震作用; 數(shù)值模擬
中圖分類號：TU375.4 文獻標識碼：A 文章編號：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
作者簡介：閤東東，博士，高級工程師，一級注冊結構工程師，Email：gddhust@gmail.com。
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