部分柱顶滑移钢筋混凝土框剪结构
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摘要
从抗倒塌角度出发,提出了部分柱顶滑移钢筋混凝土框剪结构的设想,并建议了具体的设计方法及步骤。通过弹塑性分析,初步比较了该类新型结构与常规框剪结构的经济性及弹塑性地震响应。研究结果表明:1)通过柱顶滑移释放部分框架柱的柱顶内力,可在造价略有增加的情况下,使结构具有更好的抗倒塌能力;2)与滑移柱顶相联的摩擦支座的摩擦系数在一定范围内时,该新型结构既具有与常规结构相近的抗侧刚度以确保小震不坏,又能在大震下确保结构的竖向承载能力以实现大震不倒。
A new kind of RC frame-shear wall structures with partial columns sliding at upper ends is proposed in this paper,and the corresponding design procedures are suggested.Elastic-plastic analyses are conducted for both the proposed structures and conventional frame-shear wall structures,and their construction costs and earthquake responses are compared.Simulation results show that:(a) although the construction cost of the proposed structures is a little higher than that of the conventional frame-shear wall structures,the collapse-resisting capacity of the proposed structures is better than that of the conventional structures;and(b) in the case that the friction coefficients at the upper ends of partial sliding columns are in a certain range,the lateral stiffnesses of the proposed structures are similar to those of the conventional structures,this preventing the proposed structures from damage under a minor earthquake,and the vertical load bearing capacities of the proposed structures subjected to a major earthquake can be maintained,this preventing the proposed structures from collapse.
A new kind of RC frame-shear wall structures with partial columns sliding at upper ends is proposed in this paper,and the corresponding design procedures are suggested.Elastic-plastic analyses are conducted for both the proposed structures and conventional frame-shear wall structures,and their construction costs and earthquake responses are compared.Simulation results show that:(a) although the construction cost of the proposed structures is a little higher than that of the conventional frame-shear wall structures,the collapse-resisting capacity of the proposed structures is better than that of the conventional structures;and(b) in the case that the friction coefficients at the upper ends of partial sliding columns are in a certain range,the lateral stiffnesses of the proposed structures are similar to those of the conventional structures,this preventing the proposed structures from damage under a minor earthquake,and the vertical load bearing capacities of the proposed structures subjected to a major earthquake can be maintained,this preventing the proposed structures from collapse.
引文
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[2]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.GB50011-2001,Code for seismic design of buildings[S].Beijing:China Architecture and Building Press,2001.(inChinese)
[3]于山,苏幼坡,马东辉.钢筋混凝土建筑抗倒塌设计[J].地震工程与工程振动,2005,25(5):67―72.Yu Shan,Su Youpo,Ma Donghui.Design of reinforcedconcrete buildings to resist progressive collapse[J].Earthquake Engineering and Engineering Vibration,2005,25(5):67―72.(in Chinese)
[4]丰定国,王社良.抗震结构设计[M].武汉:武汉理工大学出版社,2001.Feng Dingguo,Wang Sheliang.Seismic design ofstructure[M].Wuhan:Wuhan University of TechnologyPress,2001.(in Chinese)
[5]吴波,陈展图.抗倒塌柱顶部分滑移钢筋混凝土框架结构的初步研究[J].地震工程与工程振动,2008,28(4):82―87.Wu Bo,Chen Zhantu.Preliminary study on RC framestructures with sliding at partial column upper ends forpreventing collapse[J].Earthquake Engineering andEngineering Vibration,2008,28(4):82―87.(in Chinese)
[6]莫庸.台湾9.21大地震多层框架结构震害特点和经验[J].工程抗震,2002(4):26―30.Mo Yong.Disaster characteristics and experiences ofmultistory frame structures in Taiwan 9.21 Earthquake[J].Earthquake Resistant Engineering,2002(4):26―30.(in Chinese)
[7]王亚勇,白雪霜.台湾9.21地震中钢筋混凝土结构震害特征[J].工程抗震,2001(1):3―7.Wang Yayong,Bai Xueshuang.Disaster characteristics ofRC structures in Taiwan 9.21 Earthquake[J].EarthquakeResistant Engineering,2001(1):3―7.(in Chinese)
[8]Computer and Structures Inc.Perform-3D user guideversion 4[M].Berkeley:Computer and Structures Inc.2006.
[9]Computer and Structures Inc.Perform component andelement[M].Berkeley:Computer and Structures Inc.2006.
[10]Park Y J,Wen Y K,Ang A H S.Random vibration ofhysteretic systems under bi-directional ground motions[J].Earthquake Engineering&Structural Dynamics,1986,14(4),543―557.
[11]Constantinou M,Mokha A,Reinhorn A.Teflon bearingsin base isolation Part II:Modeling[J].Journal ofStructural Engineering,ASCE,1990,116(2):455―474.
[12]布尚B.摩擦学导论[M].北京:机械工业出版社,2007.Bhushan B.Introduction to tribology[M].Beijing:ChinaMachine Press,2007.(in Chinese)
[13]Mokha A,Constantinou M,Reinhorn A.Teflon bearingsin base isolation Part I:Testing[J].Journal of StructuralEngineering,ASCE,1990,116(2):438―454.
[14]GB50009-2001,建筑结构荷载规范[S].北京:中国建筑工业出版社,2002.GB50009-2001,Load code for the design of buildingstructures[S].Beijing:China Architecture and BuildingPress,2002.(in Chinese)
[15]GB50010-2002,混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.GB 50010-2002,Code for design of concrete structures[S].Beijing:China Architecture and Building Press,2002.(in Chinese)
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