典型高層RC框剪結(jié)構(gòu)抗連續(xù)倒塌性能分析*
任沛琪1，李易2，陸新征1，葉列平1
- 摘 要
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(1 清華大學(xué)土木工程安全與耐久教育部重點實驗室， 北京 100084；2 北京工業(yè)大學(xué)城市與工程安全減災(zāi)教育部重點實驗室， 北京 100124)［摘要］通過對兩棟具有不同典型結(jié)構(gòu)布置形式的15層鋼筋混凝土(RC)框剪結(jié)構(gòu)的抗連續(xù)倒塌性能的分析，檢驗了按照現(xiàn)行《混凝土結(jié)構(gòu)設(shè)計規(guī)范》（GB 50010—2010）設(shè)計的高層RC框剪結(jié)構(gòu)的抗連續(xù)倒塌能力。采用線性靜力拆除構(gòu)件法對其中一棟結(jié)構(gòu)進行抗連續(xù)倒塌設(shè)計，驗證線性靜力拆除構(gòu)件法用于高層RC框剪結(jié)構(gòu)抗連續(xù)倒塌設(shè)計時的安全性和經(jīng)濟性。分析結(jié)果表明，高層RC框剪結(jié)構(gòu)的抗連續(xù)倒塌能力存在顯著差異。如果結(jié)構(gòu)中的剪力墻相互連接貫通，在部分剪力墻發(fā)生初始破壞的情況下，剩余剪力墻能夠很好地完成內(nèi)力重分布，抵抗連續(xù)倒塌的發(fā)生?？蚣懿糠值目惯B續(xù)倒塌性能取決于結(jié)構(gòu)設(shè)計的冗余度：如果結(jié)構(gòu)設(shè)計較保守，則框架部分的抗連續(xù)倒塌能力較強，可以滿足抗連續(xù)倒塌的要求；若設(shè)計按規(guī)范下限要求進行，則框架部分的抗連續(xù)倒塌能力存在不足，需要進行專門的抗連續(xù)倒塌設(shè)計。清華大學(xué)建議的線性靜力拆除構(gòu)件設(shè)計方法對結(jié)構(gòu)進行抗連續(xù)倒塌設(shè)計是安全可靠的，并且具有一定的經(jīng)濟性。［關(guān)鍵詞］連續(xù)倒塌; 高層框剪結(jié)構(gòu); 拆除構(gòu)件法中圖分類號：TU375 文獻標(biāo)識碼：A 文章編號：1002-848X(2013)23-0053-04Analysis on progressive collapse resistance of typical high-rise RC frame-shear wall structuresRen Peiqi1, Li Yi2, Lu Xinzheng1, Ye Lieping1(1 Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education, Tsinghua University, Beijing 100084, China; 2 Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China)Abstract: In order to investigate the progressive collapse resistance of high-rise reinforced concrete frame-shear wall structures designed according to Code for design of concrete structures（GB 50010—2010), two 15-storey RC frame-shear wall building models with different typical structural layouts were analyzed. Linear static alternative load path method was applied for the progressive collapse prevention design of a building and the reliability and economical efficiency of this method to be used for the collapse prevention design for high-rise RC frame-shear wall structures were verified. The results show that significant differences exist in the progressive collapse resistance of high-rise RC frame-wall structures. When parts of the shear-walls are destroyed, if the shear-walls are connected to each other, then the residual structures will have good ability to redistribute the internal forces to resist progressive collapse. Progressive collapse resistance of the frame part depends on the redundancy of the structural design. If the design is conservative, then the frame has good performance in progressive collapse prevention. However, if the design follows the minimum requirement of Chinese design specification, the frame cannot efficiently resist progressive collapse and needs additional progressive collapse prevention design. The linear static alternative load path method proposed by Tsinghua University has enough safety and a certain economy to be used in the progressive collapse prevention design of structures.Keywords: progressive collapse; high-rise frame-shear wall structure; alternative load path method*國家重點基礎(chǔ)研究發(fā)展計劃（973）（2012CB719703），鐵道部科技研究開發(fā)計劃重點課題（2012G003-j），清華大學(xué)自主研究項目（2012THZ06），教育部新世紀(jì)優(yōu)秀人才支持計劃資助（NCET-10-0528）。作者簡介：任沛琪，碩士研究生，Email: huixin0928@163.com。參考文獻［1］梁益, 陸新征, 繆志偉,等. 結(jié)構(gòu)的連續(xù)倒塌: 規(guī)范介紹和比較［C］//第六屆全國工程結(jié)構(gòu)安全防護學(xué)術(shù)會議論文集. 洛陽，2007：195-200.［2］李易, 葉列平, 陸新征. 基于能量方法的RC框架結(jié)構(gòu)連續(xù)倒塌抗力需求分析I：梁機制［J］. 建筑結(jié)構(gòu)學(xué)報, 2011, 32(11): 1-8.［3］李易, 陸新征, 葉列平. 基于能量方法的RC框架結(jié)構(gòu)連續(xù)倒塌抗力需求分析II：懸鏈線機制［J］. 建筑結(jié)構(gòu)學(xué)報, 2011, 32(11): 9-16.［4］GSA2003 Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects［S］. US General Services Administration, 2003.［5］Department of Defense. Unified Facilities Criteria (UFC): Design of structures to resist progressive collapse［S］. Washington, D.C., 2010.［6］GB 50010—2010 混凝土結(jié)構(gòu)設(shè)計規(guī)范［S］. 北京：中國建筑工業(yè)出版社，2011.［7］陸新征, 葉列平, 繆志偉，等. 建筑抗震彈塑性分析——原理、模型與在ABAQUS, MSC.MARC和SAP2000上的實踐［M］. 北京: 中國建筑工業(yè)出版社, 2009.［8］陸新征,李易,葉列平.混凝土結(jié)構(gòu)防連續(xù)倒塌理論與設(shè)計方法研究［M］.北京:中國建筑工業(yè)出版社,2011.
