钢筋混凝土剪力墙的变形能力及基于性能的抗震设计
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摘要
影响钢筋混凝土剪力墙变形能力的主要因素包括高宽比r、轴压比n、边缘约束构件约束程度等。本文首先建立了钢筋混凝土剪力墙端部约束构件的配箍特征值λvw、轴压比n、高宽比r与剪力墙极限位移Δuw之间的关系,即λvw-n-r-Δuw关系,然后通过7个研究机构所进行的钢筋混凝土剪力墙试验对该关系进行了验证。在此关系的基础上,本文提出了钢筋混凝土剪力墙基于性能的抗震设计方法。根据本文方法,设计者可以在已知层间位移角需求θ及确定损伤指标Dw的情况下对剪力墙端部约束构件进行配箍。本文最后通过一算例详细介绍了该方法的设计过程。
Deformation capacity of reinforced concrete shear walls is mainly influenced by wall aspect ratio r,axial force ratio n and concrete confinement at the boundaries of shear walls.In this paper,the relationship among the confining reinforcement characteristic value λvw,the axial force ratio n,the wall aspect ratio r and the ultimate displacement Δuw is established firstly.Then,the relationship in form of λvw-n-r-Δuw is verified by the RC shear wall experiments,which were conducted by 7 research institutions.Based on the relationship,the performance-based seismic design method for RC shear walls is put forward.According to the method proposed in the paper,the transverse reinforcement at wall boundaries could be assessed,if the inter-story drift demand θ and the damage index Dw are known.At the end of the paper,an example is illustrated to explain the method in detail.
Deformation capacity of reinforced concrete shear walls is mainly influenced by wall aspect ratio r,axial force ratio n and concrete confinement at the boundaries of shear walls.In this paper,the relationship among the confining reinforcement characteristic value λvw,the axial force ratio n,the wall aspect ratio r and the ultimate displacement Δuw is established firstly.Then,the relationship in form of λvw-n-r-Δuw is verified by the RC shear wall experiments,which were conducted by 7 research institutions.Based on the relationship,the performance-based seismic design method for RC shear walls is put forward.According to the method proposed in the paper,the transverse reinforcement at wall boundaries could be assessed,if the inter-story drift demand θ and the damage index Dw are known.At the end of the paper,an example is illustrated to explain the method in detail.
引文
[1]Mander J B,Priestley M J N,Park R.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,ASCE,1988,114(8):1804-1826.
[2]吕西林,周定松,蒋欢军.钢筋混凝土框架柱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(6):53-61.
[3]Wallace J W.New methodology for seismic design of RC shear walls[J].Journal of Structural Engineering,1992,120(3):863-884.
[4]Park R,Paulay T.Reinforced concrete structures[M].New York:John Wiley&Sons,1975.
[5]Kowalsky MJ.RC structural walls design according to UBC and displacement-based methods[J].Journal of Structural Engineering,2001,127(5):506-515.
[6]Priestley MJ N,Kowalsky MJ.Aspects of drifts and ductility capacity of rectangular cantilever structural walls[J].Bulletin of the NewZealandNational Society for Earthquake Engineering,1998,31(2):73-85.
[7]章红梅.剪力墙结构基于性态的抗震设计方法研究[D].上海:同济大学博士学位论文,2007.
[8]章红梅,吕西林.黏钢加固钢筋混凝土剪力墙抗震性能试验研究[J].结构工程师,2007,23(1):72-76.
[9]蒋欢军,吕西林.沿竖向耗能剪力墙的低周反复荷载试验研究[J].工程力学,1997,A02:649-654.
[10]周广强.高层建筑钢筋混凝土剪力墙滞回关系及性能研究[D].上海:同济大学硕士学位论文,2004.
[11]张展,周克荣.变高宽比高性能混凝土剪力墙抗震性能的试验研究[J].结构工程师,2004,21(2):62-68.
[12]李宏男,李兵.钢筋混凝土剪力墙抗震恢复力模型及试验研究[J].建筑结构学报,2004,25(5):35-42.
[13]陈勤,钱稼茹,李耕勤.剪力墙受力性能的宏模型静力弹塑性分析[J]土木工程学报,2004,37(3):35-43.
[14]张云峰.钢筋混凝土剪力墙高轴压比下抗震性能试验研究[D].北京:清华大学硕士学位论文,1996.
[15]崔熙光,刘永健,郭峰,等.冷轧带肋钢筋混凝土剪力墙的试验分析[J].沈阳建筑工程学院学报:自然科学版,2004,20(2):103-106.
[16]Oh Y H,Han S W,Lee LH.Effect of boundary element details on the seismic deformation capacity of structural walls[J].Earthquake Engineer-ing and Strucutural Dynamics,2002,31(8):1583-1602.
[17]Lefas I D,Kotsovos M D,Ambraseys N N.Behavior of reinforced concrete structural walls:strength,deformation characteristics and failuremechanism[J].ACI Structural Journal,1990,87(1):23-31.
[18]Thomsen J H,Wallace J W.Displacement-based design of slender reinforced concrete structural walls—experimental verification[J].Journal ofStructural Engineering,2004,130(4):618-630.
[19]黄志华,吕西林,周颖,等.不同R-μ-T关系对比研究及其在高层混合结构位移需求估计中的应用[J].地震工程与工程振动,2009,29(2):42-50.
[2]吕西林,周定松,蒋欢军.钢筋混凝土框架柱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(6):53-61.
[3]Wallace J W.New methodology for seismic design of RC shear walls[J].Journal of Structural Engineering,1992,120(3):863-884.
[4]Park R,Paulay T.Reinforced concrete structures[M].New York:John Wiley&Sons,1975.
[5]Kowalsky MJ.RC structural walls design according to UBC and displacement-based methods[J].Journal of Structural Engineering,2001,127(5):506-515.
[6]Priestley MJ N,Kowalsky MJ.Aspects of drifts and ductility capacity of rectangular cantilever structural walls[J].Bulletin of the NewZealandNational Society for Earthquake Engineering,1998,31(2):73-85.
[7]章红梅.剪力墙结构基于性态的抗震设计方法研究[D].上海:同济大学博士学位论文,2007.
[8]章红梅,吕西林.黏钢加固钢筋混凝土剪力墙抗震性能试验研究[J].结构工程师,2007,23(1):72-76.
[9]蒋欢军,吕西林.沿竖向耗能剪力墙的低周反复荷载试验研究[J].工程力学,1997,A02:649-654.
[10]周广强.高层建筑钢筋混凝土剪力墙滞回关系及性能研究[D].上海:同济大学硕士学位论文,2004.
[11]张展,周克荣.变高宽比高性能混凝土剪力墙抗震性能的试验研究[J].结构工程师,2004,21(2):62-68.
[12]李宏男,李兵.钢筋混凝土剪力墙抗震恢复力模型及试验研究[J].建筑结构学报,2004,25(5):35-42.
[13]陈勤,钱稼茹,李耕勤.剪力墙受力性能的宏模型静力弹塑性分析[J]土木工程学报,2004,37(3):35-43.
[14]张云峰.钢筋混凝土剪力墙高轴压比下抗震性能试验研究[D].北京:清华大学硕士学位论文,1996.
[15]崔熙光,刘永健,郭峰,等.冷轧带肋钢筋混凝土剪力墙的试验分析[J].沈阳建筑工程学院学报:自然科学版,2004,20(2):103-106.
[16]Oh Y H,Han S W,Lee LH.Effect of boundary element details on the seismic deformation capacity of structural walls[J].Earthquake Engineer-ing and Strucutural Dynamics,2002,31(8):1583-1602.
[17]Lefas I D,Kotsovos M D,Ambraseys N N.Behavior of reinforced concrete structural walls:strength,deformation characteristics and failuremechanism[J].ACI Structural Journal,1990,87(1):23-31.
[18]Thomsen J H,Wallace J W.Displacement-based design of slender reinforced concrete structural walls—experimental verification[J].Journal ofStructural Engineering,2004,130(4):618-630.
[19]黄志华,吕西林,周颖,等.不同R-μ-T关系对比研究及其在高层混合结构位移需求估计中的应用[J].地震工程与工程振动,2009,29(2):42-50.
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