带端柱高性能混凝土剪力墙的抗震性能
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摘要
为进一步改善高性能混凝土剪力墙的抗震性能,在6个带端柱高性能混凝土剪力墙试件中采用分段约束、相互嵌套的配箍方案;试件的剪跨比为1.0～2.1,轴压比为0.28～0.40,混凝土立方体抗压强度在89～99 MPa之间,横向约束箍筋采用极限强度为742 MPa的高强钢丝。对这6个试件进行了拟静力试验,观察了各试件的裂缝开展过程和破坏形态,分析了其滞回性能、承载能力、变形能力、刚度衰减和截面应变等。实测位移延性系数在3.75～5.20,耗能系数在0.76～1.13,表明采用横向分段约束嵌套的配箍方案有效地提高了带端柱高性能混凝土剪力墙的延性、变形和耗能能力等。根据试验结果,分别以侧移角和塑性铰转角作为性能指标,并给出了四个性能水平的性能指标限值。
To improve the seismic behavior of high performance concrete shear wall(HPCW),a new stirrup arrangement of independent closed reinforcement hoops nested with each other in six HPCWs with edge columns was developed,and verified by the pseudo-static test.Aspect ratios of walls are 1～2,and axial load ratios 0.28 ～0.40.The cubic compressive strength of concrete is 89～99 MPa for different specimens.The ultimate strength of stirrup is 737.5 MPa.Development of cracks and failure modes of specimens were compared.Hysteretic characteristics,load-bearings,deformation-ability,and rigid attenuation,strain of reinforcement were analyzed.The displacement ductile ratios measured were 3.75～5.20,the coefficients of energy dissipation were 0.76～1.31.Results showed that the new stirrup arrangement effectively improved the seismic behavior of the HPSW with edge columns such as ductility,deformability,energy dissipation capacity etc.Based on results,allowable values of drift angle and rotation of plastic hinge for four performance levels of shear wall components were presented.
To improve the seismic behavior of high performance concrete shear wall(HPCW),a new stirrup arrangement of independent closed reinforcement hoops nested with each other in six HPCWs with edge columns was developed,and verified by the pseudo-static test.Aspect ratios of walls are 1～2,and axial load ratios 0.28 ～0.40.The cubic compressive strength of concrete is 89～99 MPa for different specimens.The ultimate strength of stirrup is 737.5 MPa.Development of cracks and failure modes of specimens were compared.Hysteretic characteristics,load-bearings,deformation-ability,and rigid attenuation,strain of reinforcement were analyzed.The displacement ductile ratios measured were 3.75～5.20,the coefficients of energy dissipation were 0.76～1.31.Results showed that the new stirrup arrangement effectively improved the seismic behavior of the HPSW with edge columns such as ductility,deformability,energy dissipation capacity etc.Based on results,allowable values of drift angle and rotation of plastic hinge for four performance levels of shear wall components were presented.
引文
[1]周履.高性能混凝土发展的综合评述[J].建筑结构,2004,34(6):65-72.
[2]李莉,薛素铎,曹万林.高强高性能混凝土剪力墙的研究现状及展望[J].世界地震工程,2008,24(2):90-96.
[3]龚治国,吕西林,姬守中.不同边缘构件约束剪力墙抗震性能试验研究[J].结构工程师,2006,22(1):56-61.
[4]OH Y-H,HAN S.W,LEE L-H.Effect of Boundary ElementDetails on the Seismic Deformation Capacity of Structural Walls[J].Earthquake Engineering and Structural Dynamics.2002,31:1583-1602.
[5]章红梅,吕西林,鲁亮,等.边缘约束构件对钢筋混凝土剪力墙抗震性能的影响[J].地震工程与工程振动.,2007,27(1):92-98.
[6]梁兴文,邓明科,张兴虎,等.高性能混凝土剪力墙性能设计理论的实验研究[J].建筑结构学报,2007,28(5):80-88.
[7]GB50011—2010建筑抗震设计规范[S].
[8]钱稼茹,吕文,方鄂华.基于位移延性的剪力墙抗震设计[J].建筑结构学报,1999,20(3):42-48.
[9]钱稼茹,徐福江.钢筋混凝土剪力墙基于位移的变形能力设计方法[J].清华大学学报,2007,47(3):1-4.
[10]过镇海、时旭东.钢筋混凝土原理和分析[M].北京:清华大学出版社,2005:336-337
[11]李莉,薛素铎,曹万林.带SRC边框高强混凝土剪力墙抗震性能试验研究[C]∥第八届全国现代结构工程学术研讨会.天津:2008:1610-1615.
[12]Emany F F,Foster S J,Rangan B W.Strength and Deformation ofHigh Strength Concrete Shearwalls[J].ACI Structural Journal.2008,105(1):21-29.
[2]李莉,薛素铎,曹万林.高强高性能混凝土剪力墙的研究现状及展望[J].世界地震工程,2008,24(2):90-96.
[3]龚治国,吕西林,姬守中.不同边缘构件约束剪力墙抗震性能试验研究[J].结构工程师,2006,22(1):56-61.
[4]OH Y-H,HAN S.W,LEE L-H.Effect of Boundary ElementDetails on the Seismic Deformation Capacity of Structural Walls[J].Earthquake Engineering and Structural Dynamics.2002,31:1583-1602.
[5]章红梅,吕西林,鲁亮,等.边缘约束构件对钢筋混凝土剪力墙抗震性能的影响[J].地震工程与工程振动.,2007,27(1):92-98.
[6]梁兴文,邓明科,张兴虎,等.高性能混凝土剪力墙性能设计理论的实验研究[J].建筑结构学报,2007,28(5):80-88.
[7]GB50011—2010建筑抗震设计规范[S].
[8]钱稼茹,吕文,方鄂华.基于位移延性的剪力墙抗震设计[J].建筑结构学报,1999,20(3):42-48.
[9]钱稼茹,徐福江.钢筋混凝土剪力墙基于位移的变形能力设计方法[J].清华大学学报,2007,47(3):1-4.
[10]过镇海、时旭东.钢筋混凝土原理和分析[M].北京:清华大学出版社,2005:336-337
[11]李莉,薛素铎,曹万林.带SRC边框高强混凝土剪力墙抗震性能试验研究[C]∥第八届全国现代结构工程学术研讨会.天津:2008:1610-1615.
[12]Emany F F,Foster S J,Rangan B W.Strength and Deformation ofHigh Strength Concrete Shearwalls[J].ACI Structural Journal.2008,105(1):21-29.
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