钢桁架连梁-剪力墙结构受力性能的数值模拟
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摘要
利用数值模拟技术,建立了两个单跨两层钢筋混凝土连梁和钢桁架连梁的剪力墙结构的有限元模型,对比了二者在循环荷载作用下的受力性能,并分析了轴压比、连梁截面尺寸对剪力墙结构的承载力和变形性能的影响规律.分析结果表明:钢桁架连梁的剪力墙较钢筋混凝土连梁的剪力墙,其承载力虽有所降低,但在很大程度上降低了剪力墙的应力和损伤,且其耗能性能和延性均有大幅的提高;轴压比的增大对剪力墙承载力有所提高,但不成比例;钢桁架连梁腹杆截面尺寸对剪力墙结构的承载力有很大影响,弦杆截面尺寸的影响不显著.研究结果对剪力墙的抗震性能的设计计算具有一定的参考价值.
Finite element models of single span and two-storey shear walls with concrete coupling beams and steel truss coupling beams are established for comparing mechanical behaviors of the two types of coupling beams under cyclic loads and studying influences of axial compression ratio and section sizes of steel truss coupling beam on bearing capacities and deformation properties of shear walls.The studies show that shear walls with steel truss coupling beams reduce bearing capacities slightly but cut down stress and damages and ductility and substantially enhance energy dissipation behavior compared with shear walls with concrete coupling beams.In addition,bearing capacities of shear walls improve with the increase of axial compression ratio disproportionately and section size of ventral poles has a great effect on bearing capacities of shear walls but that of the chords reverses.The research results have a certain value on seismic design of shear walls.
Finite element models of single span and two-storey shear walls with concrete coupling beams and steel truss coupling beams are established for comparing mechanical behaviors of the two types of coupling beams under cyclic loads and studying influences of axial compression ratio and section sizes of steel truss coupling beam on bearing capacities and deformation properties of shear walls.The studies show that shear walls with steel truss coupling beams reduce bearing capacities slightly but cut down stress and damages and ductility and substantially enhance energy dissipation behavior compared with shear walls with concrete coupling beams.In addition,bearing capacities of shear walls improve with the increase of axial compression ratio disproportionately and section size of ventral poles has a great effect on bearing capacities of shear walls but that of the chords reverses.The research results have a certain value on seismic design of shear walls.
引文
[1]刘增夕,初风荣,张鹏.框架-抗震墙协同工作时的地震反应分析[J].广西工学院学报,2000,11(1):68-77.
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[3]Paulay T.Diagonally reinforced coupling beams of shear walls[J].ACI Special Publication SP-42,1972,1:579-598.
[4]龚炳年,方鄂华.反复荷载下联肢剪力墙结构连系梁的性能[J].建筑结构学报,1988,18(1):34-40.
[5]Zhao Z Z,Kwan A K H.Nonlinear Behavior of Deep Reinforced Concrete Coupling Beams[J].Structural Engineering and Mechanics,2003,15(2):181-198.
[6]董宏英,曹万林,胡国振,等.不同连梁跨高比带暗支撑双肢剪力墙抗震性能试验研究[J].地震工程与工程振动,2005,25(1):92-96.
[7]傅剑平,赵杰林,曹云锋,等.采用新配筋方案小跨高比抗震连梁的试验研究[J].重庆建筑大学学报,2004,26(1):50-54.
[8]Park Wan-Shin,Yun Hyun-Do.Seismic behaviour of steel coupling beams linking reinforced concrete shear walls[J].EngineeringStructures,2005,27:1024-1039.
[9]Chenga Chin-Tung,Chenb Cheng-Chih.Seismic behavior of steel beam and reinforced concrete column connections[J].Journal ofConstructiona1 Stee1 Research,2005.61(9):587-606.
[10]邓志恒,潘峰,陶晓光,等.新型组合连梁控制结构体系[J].世界地震工程,2003,19(3):6-11.
[11]潘峰.新型钢连梁控制结构抗震性能研究[D].南宁:广西大学,2004.
[12]刘岩.新型组合连梁控制结构抗震性能研究[D].南宁:广西大学,2007.
[13]徐冬晓.钢桁架连梁抗震性能试验研究[D].南宁:广西大学,2008.
[14]杨秋红,韦锦兵.多高层结构计算软件选择初探[J].广西工学院学报,1999,10(4):28-31.
[15]曲哲.摇摆墙-框架结构抗震损伤机制控制及设计方法研究[D].北京:清华大学,2010.
[16]廖天军.双层钢桁架及RC连梁剪力墙结构伪静力试验研究[D].南宁:广西大学,2010.
[2]胡淑兰.框支剪力墙中框支梁的多遇地震反应分析[J].广西工学院学报,2010,21(4):49-53.
[3]Paulay T.Diagonally reinforced coupling beams of shear walls[J].ACI Special Publication SP-42,1972,1:579-598.
[4]龚炳年,方鄂华.反复荷载下联肢剪力墙结构连系梁的性能[J].建筑结构学报,1988,18(1):34-40.
[5]Zhao Z Z,Kwan A K H.Nonlinear Behavior of Deep Reinforced Concrete Coupling Beams[J].Structural Engineering and Mechanics,2003,15(2):181-198.
[6]董宏英,曹万林,胡国振,等.不同连梁跨高比带暗支撑双肢剪力墙抗震性能试验研究[J].地震工程与工程振动,2005,25(1):92-96.
[7]傅剑平,赵杰林,曹云锋,等.采用新配筋方案小跨高比抗震连梁的试验研究[J].重庆建筑大学学报,2004,26(1):50-54.
[8]Park Wan-Shin,Yun Hyun-Do.Seismic behaviour of steel coupling beams linking reinforced concrete shear walls[J].EngineeringStructures,2005,27:1024-1039.
[9]Chenga Chin-Tung,Chenb Cheng-Chih.Seismic behavior of steel beam and reinforced concrete column connections[J].Journal ofConstructiona1 Stee1 Research,2005.61(9):587-606.
[10]邓志恒,潘峰,陶晓光,等.新型组合连梁控制结构体系[J].世界地震工程,2003,19(3):6-11.
[11]潘峰.新型钢连梁控制结构抗震性能研究[D].南宁:广西大学,2004.
[12]刘岩.新型组合连梁控制结构抗震性能研究[D].南宁:广西大学,2007.
[13]徐冬晓.钢桁架连梁抗震性能试验研究[D].南宁:广西大学,2008.
[14]杨秋红,韦锦兵.多高层结构计算软件选择初探[J].广西工学院学报,1999,10(4):28-31.
[15]曲哲.摇摆墙-框架结构抗震损伤机制控制及设计方法研究[D].北京:清华大学,2010.
[16]廖天军.双层钢桁架及RC连梁剪力墙结构伪静力试验研究[D].南宁:广西大学,2010.
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