地震作用下高層鋼筋混凝土結(jié)構(gòu)倒塌數(shù)值模擬
閤東東，陳曦，苗啟松
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（北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045）
［摘要］對(duì)地震作用下高層鋼筋混凝土結(jié)構(gòu)基于ABAQUS軟件平臺(tái)的倒塌數(shù)值模擬方法進(jìn)行了介紹。采用有限單元法，通過(guò)材料層面的失效實(shí)現(xiàn)模擬構(gòu)件損傷失效乃至整體結(jié)構(gòu)的破壞倒塌。采用纖維梁?jiǎn)卧M鋼筋混凝土框架梁和柱，提出了一種新的纖維梁?jiǎn)卧较螯c(diǎn)計(jì)算方法，并給出了計(jì)算公式，基于VUMAT用戶子程序?qū)崿F(xiàn)梁?jiǎn)卧牧戏e分點(diǎn)材料的失效用于模擬單元消失。采用殼單元模擬鋼筋混凝土剪力墻和樓板，提出了殼單元消失的精確模擬方法，編制了能夠用于實(shí)現(xiàn)殼單元材料積分點(diǎn)材料失效的子程序?？紤]了倒塌過(guò)程中構(gòu)件之間的接觸。以某鋼筋混凝土框架和框架-剪力墻結(jié)構(gòu)為例，分別對(duì)其在強(qiáng)震作用下的破壞模式和倒塌過(guò)程進(jìn)行了數(shù)值模擬，結(jié)果表明提出的仿真方法是可行的，對(duì)其他類型的結(jié)構(gòu)倒塌數(shù)值模擬也具有一定的借鑒意義。［關(guān)鍵詞］數(shù)值模擬; 倒塌; 地震作用; 高層鋼筋混凝土結(jié)構(gòu)中圖分類號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)23-0106-07
Research of numerical simulation of collapse of high-rise structure subjected to earthquakeGe Dongdong, Chen Xi, Miao Qisong(Beijing Institute of Architectural Design, Beijing 100045, China)Abstract: Numerical simulation method of collapse of high-rise reinforced concrete structure subjected to earthquake based on ABAQUS program was introduced. Using the finite element method, the failure on the material level was used to simulate the damage and failure of structural members as well as even collapse failure of the global structure. Reinforced concrete frame beams and columns were simulated by fiber beam elements. A new method about determination of orientation node of fiber beam element was proposed and calculation formula was provided. Element death was realized by the failure of integral point materials of beam element materials based on subroutine VUMAT. Reinforced concrete shear walls and slabs were simulated by shell elements. Element death of the shell element was implemented in terms of a new accurate simulation method, and the corresponding subroutine used to delete the failure of integral point materials of shell element was developed. Contacts of members in collapse process were also considered. Taking a RC frame and a frameshear wall structure as example, failure mode and collapse process of the structures subjected to rare earthquakes were simulated respectively. The simulation results show that the proposed simulating method is practicable, and provides reference for numerical simulation of structure collapse for other structures.Keywords: numerical simulation; collapse; seismic effect; high-rise reinforced concrete structure
作者簡(jiǎn)介：閤東東，博士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：gddhust@163.com。
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