鋼筋混凝土空間框架結(jié)構(gòu)抗連續(xù)倒塌機制研究*
熊進剛, 吳趙強, 鄒園, 何以農(nóng), 聶曉霞
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熊進剛, 吳趙強, 鄒園, 何以農(nóng), 聶曉霞（南昌大學(xué)建筑工程學(xué)院， 南昌 330031）［摘要］進行了兩個3層、4×2跨的鋼筋混凝土空間框架模型的連續(xù)倒塌試驗，模型1的初始失效柱是底層長邊中柱，模型2的初始失效柱是底層角柱。模型不考慮抗震要求，以機械千斤頂替換初始失效柱，通過機械千斤頂?shù)姆旨壭遁d模擬柱的初始失效。觀測并分析了兩個試驗?zāi)Ｐ偷目沽Κ参灰魄€、結(jié)構(gòu)受力機制及結(jié)構(gòu)抗連續(xù)倒塌能力。分析表明，對于模型1，結(jié)構(gòu)抗連續(xù)倒塌機制包含梁機制和懸鏈線機制；對于模型2，結(jié)構(gòu)抗連續(xù)倒塌機制僅為梁機制。［關(guān)鍵詞］空間框架；連續(xù)倒塌；梁機制；懸鏈線機制中圖分類號：TU375.4 文獻標(biāo)識碼：A 文章編號：1002-848X(2013)09-0105-04Research on progressive collapse mechanism of RC spatial frame structuresXiong Jingang, Wu Zhaoqiang, Zou Yuan, He Yinong, Nie Xiaoxia(School of Architectural Engineering, Nanchang University, Nanchang 330031, China)Abstract: Progressive collapse experiments were carried out for two, (4×2)-bay and 3-storey reinforced concrete (RC) spatial frame models, which were designed without seismic demand. The middle of long side column and the corner column of the bottom floor, respectively in model 1 and model 2, were replaced by mechanical jacks to simulate the initial damage. Resistance-displacement curve, load transferring mechanism and progressive collapse resistance of the two models were analyzed. It is concluded that progressive collapse resistance consists of beam mechanism and catenary mechanism in model 1. Only beam mechanism plays a part in resisting progressive collapse in model 2.Keywords: spatial frame; progressive collapse; beam mechanism; catenary mechanism*國家自然科學(xué)基金項目(50968012)。作者簡介：熊進剛，博士，教授，Email：xiongjingang@ncu.edu.cn。參考文獻［1］江曉峰，陳以一. 建筑結(jié)構(gòu)連續(xù)性倒塌及其控制設(shè)計的研究現(xiàn)狀［J］.土木工程學(xué)報，2008,41（6）：1-8.［2］XIONG JINGANG, ZHENG YONGKANG, CAI GUANMIN, et al. Analysis on progressive collapse resistance of reinforced concrete frame structures［C］//1st International Conference on Civil Engineering, 2011: 717-723.［3］葉列平，陸新征，李易，等. 混凝土框架結(jié)構(gòu)的抗連續(xù)性倒塌設(shè)計方法［J］.建筑結(jié)構(gòu)，2010,40（2）：1-7.［4］TALAAT MOHAMED, MOSALAM KHALID M. Modeling progressive collapse in reinforced concrete buildings using direct element removal［J］. Earthquake Engineering and Structural Dynamics,2009,38(5):609-634.［5］KFIR MENCHEL, THIERRY J, MASSART, et al. Comparison and study of different progressive collapse simulation techniques for RC structures［J］. Journal of Structural Engineering, 2009，135（6）：685-697.［6］MEHRDAD S, SERKAN S. Progressive collapse resistance of hotel San Diego［J］. Journal of Structural Engineering, 2008，134（3）：478-488.［7］易偉建，何慶鋒，肖巖. 鋼筋混凝土框架結(jié)構(gòu)抗倒塌性能的試驗研究［J］. 建筑結(jié)構(gòu)學(xué)報, 2007,28(5)：104-109.
