7度区典型框架教学楼抗震加强措施效果对比
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摘要
由于汶川地震导致大量中小学校建筑倒塌,造成巨大伤亡,住建部、中国工程院和中国地震局分别提出了不同的校舍抗震设计加强要求,但这些加强措施的实际抗倒塌效果尚缺乏定量研究。本文采用纤维梁模型,并选择合适的箍筋约束混凝土本构,对汶川地震7度区典型钢筋混凝土框架结构教学楼进行了基于IDA的倒塌率分析,研究了不同抗震加强措施的防倒塌效果,进而给出了相应的设计建议。
In the Wenchuan Earthquake,many school buildings collapsed,which caused serious casualties.So after the earthquake,Ministry of Housing and Urban-Rural Development,China Academic of Engineering,and China Earthquake Administrator proposed different strengthening methods to upgrade the seismic design of school buildings.However,the actual effects of these proposals have not been quantitatively evaluated.So in this work,fiber-beam element model with validated stirrups confined concrete constitutive law is used to build the nonlinear finite element model of a typical reinforced concrete(RC) classroom frame in zones with seismic intensity Ⅶ during the Wenchuan Earthquake.The effects of different strengthening methods on collapse-resistance are studied with collapse-fragility analysis that is based on the incremental dynamic analysis(IDA).Further design suggestions are then proposed.
In the Wenchuan Earthquake,many school buildings collapsed,which caused serious casualties.So after the earthquake,Ministry of Housing and Urban-Rural Development,China Academic of Engineering,and China Earthquake Administrator proposed different strengthening methods to upgrade the seismic design of school buildings.However,the actual effects of these proposals have not been quantitatively evaluated.So in this work,fiber-beam element model with validated stirrups confined concrete constitutive law is used to build the nonlinear finite element model of a typical reinforced concrete(RC) classroom frame in zones with seismic intensity Ⅶ during the Wenchuan Earthquake.The effects of different strengthening methods on collapse-resistance are studied with collapse-fragility analysis that is based on the incremental dynamic analysis(IDA).Further design suggestions are then proposed.
引文
[1]清华大学土木结构组,西南交通大学土木结构组,北京交通大学土木结构组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.
[2]叶列平,陆新征,赵世春,等.框架结构抗地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例的分析[J].建筑结构学报,2009,30(6):67-76.
[3]GB50023-2008建筑工程抗震设防分类标准[S].
[4]中国地震局,关于学校、医院等人员密集场所建设工程抗震设防要求确定原则的通知(中震防发〔2009〕49号)[Z],2009
[5]中国工程院土木、水利与建筑学部等.汶川地震建筑震害调查与灾后重建分析报告[M].北京:中国建筑工业出版社,2008.
[6]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001
[7]周定松,吕西林,蒋欢军.钢筋混凝土框架梁的变形能力及基于性能的抗震设计方法[J].地震工程与工程振动,2005,25(4):60-66.
[8]Saatcioglu M,Razvi S R.Strength and ductility of confined concrete[J].Journal of Structural.Engineering,ASCE,1992,118(6):1590-1607.
[9]Legeron F,Paultre P.Uniaxial confinement model for normal-and high-strength concrete columns[J].Journal of Structural.Engineering,ASCE,2003,129(2):241-252.
[10]Hoshikuma J,Kawashima K,Nagaya K,et al.Stress-strain model for confined reinforced concrete in bridge piers[J].Journal of Structural.En-gineering,ASCE,1997;123(5):624-633.
[11]Bousalem B,Chikh N.Development of a confined model for rectangular ordinary reinforced concrete columns[J].Materials and Structures,2007;40(6):605-613.
[12]钱稼茹,程丽荣,周栋梁.普通箍筋约束混凝土柱的中心受压性能[J].清华大学学报,2002,42(10):1369-1373.
[13]Mander J B,Priestley MJ N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Structural.Engineering,1988,114(8):1804-1826.
[14]Kent D C,Park R.Flexural members with confined concrete[J].ASCE 1971,97(ST7):1969-1990.
[15]叶列平,陆新征,马千里,等,混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(sup.II):131-140.
[16]Murat Saatcioglu,HSalamat,Salim R Razil.Confined columns under eccentric loading[J],Journal of Structural Engineering,ASCE,1995,121(11):1546-1556.
[17]Guney Ozcebe,Murat Saatcioglu.Confinement of concrete columns for seismic loading[J].ACI Structural Journal,1987,84(4),308-315.
[18]马玉虎.汶川地震典型框架结构震害分析和防倒塌对策研究[D].北京:清华大学,2010.
[19]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析[M].中国建筑工业出版社,2009.
[20]陆新征,叶列平.基于IDA分析的结构抗地震倒塌能力研究[J].工程抗震与加固改造,2010,32(1):13-18.
[21]吕大刚,于晓辉,王光远.基于单地震动记录IDA方法的结构倒塌分析[J].地震工程与工程振动,2009,29(6):33-39.
[22]Quantification of building seismic performance factors[S].ATC-63 Project Report,FEMA P695/June 2009.
[2]叶列平,陆新征,赵世春,等.框架结构抗地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例的分析[J].建筑结构学报,2009,30(6):67-76.
[3]GB50023-2008建筑工程抗震设防分类标准[S].
[4]中国地震局,关于学校、医院等人员密集场所建设工程抗震设防要求确定原则的通知(中震防发〔2009〕49号)[Z],2009
[5]中国工程院土木、水利与建筑学部等.汶川地震建筑震害调查与灾后重建分析报告[M].北京:中国建筑工业出版社,2008.
[6]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001
[7]周定松,吕西林,蒋欢军.钢筋混凝土框架梁的变形能力及基于性能的抗震设计方法[J].地震工程与工程振动,2005,25(4):60-66.
[8]Saatcioglu M,Razvi S R.Strength and ductility of confined concrete[J].Journal of Structural.Engineering,ASCE,1992,118(6):1590-1607.
[9]Legeron F,Paultre P.Uniaxial confinement model for normal-and high-strength concrete columns[J].Journal of Structural.Engineering,ASCE,2003,129(2):241-252.
[10]Hoshikuma J,Kawashima K,Nagaya K,et al.Stress-strain model for confined reinforced concrete in bridge piers[J].Journal of Structural.En-gineering,ASCE,1997;123(5):624-633.
[11]Bousalem B,Chikh N.Development of a confined model for rectangular ordinary reinforced concrete columns[J].Materials and Structures,2007;40(6):605-613.
[12]钱稼茹,程丽荣,周栋梁.普通箍筋约束混凝土柱的中心受压性能[J].清华大学学报,2002,42(10):1369-1373.
[13]Mander J B,Priestley MJ N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Structural.Engineering,1988,114(8):1804-1826.
[14]Kent D C,Park R.Flexural members with confined concrete[J].ASCE 1971,97(ST7):1969-1990.
[15]叶列平,陆新征,马千里,等,混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(sup.II):131-140.
[16]Murat Saatcioglu,HSalamat,Salim R Razil.Confined columns under eccentric loading[J],Journal of Structural Engineering,ASCE,1995,121(11):1546-1556.
[17]Guney Ozcebe,Murat Saatcioglu.Confinement of concrete columns for seismic loading[J].ACI Structural Journal,1987,84(4),308-315.
[18]马玉虎.汶川地震典型框架结构震害分析和防倒塌对策研究[D].北京:清华大学,2010.
[19]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析[M].中国建筑工业出版社,2009.
[20]陆新征,叶列平.基于IDA分析的结构抗地震倒塌能力研究[J].工程抗震与加固改造,2010,32(1):13-18.
[21]吕大刚,于晓辉,王光远.基于单地震动记录IDA方法的结构倒塌分析[J].地震工程与工程振动,2009,29(6):33-39.
[22]Quantification of building seismic performance factors[S].ATC-63 Project Report,FEMA P695/June 2009.
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