足尺钢桁架连梁抗震性能试验研究及非线性有限元分析
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摘要
对4个足尺的新型钢桁架连梁试件进行了低周反复荷载试验,研究了试件的破坏形态,测量分析了连梁加载点的荷载位移滞回曲线,并分析了连梁的延性、刚度退化规律和耗能能力。采用通用软件ABAQUS对钢桁架连梁进行了单调加载及低周反复加载作用下的非线性有限元分析。有限元计算和试验结果对比分析表明:两者的荷载位移曲线及承载力特征点吻合较好,都证明钢桁架连梁具有较好的延性,能够耗散较大的地震能量。在此基础上对钢桁架连梁进行了参数分析,研究了腹杆截面、弦杆截面和跨高比对连梁受力性能的影响,以供进一步研究和工程设计参考。
Based on a low-cyclic loading experimental study on 4 full-scale specimens of a new type of steel truss coupling beam,the failure patterns and the load-displacement hysteretic curves of the beams' loading point were studied,and the beams' ductility,rigidity degradation discipline and energy dissipation mechanism were analyzed as well.Nonlinear finite element analyses were conducted on these beams under monotonic loading and low cyclic loading using ABAQUS.The result of finite element calculation and test shows that the load-displacement curves and bearing capacities' characteristic points of both methods are in a good agreement,which all prove that the steel truss coupling beam has good ductility and good ability of dissipating earthquake energy.Parametric analyses were carried on to investigate the influences of the sections of web members and chord members,and the span-to-depth ratio on the beams' mechanical property,which can be available for reference of further research and aseismic design of the steel truss coupling beam system.
Based on a low-cyclic loading experimental study on 4 full-scale specimens of a new type of steel truss coupling beam,the failure patterns and the load-displacement hysteretic curves of the beams' loading point were studied,and the beams' ductility,rigidity degradation discipline and energy dissipation mechanism were analyzed as well.Nonlinear finite element analyses were conducted on these beams under monotonic loading and low cyclic loading using ABAQUS.The result of finite element calculation and test shows that the load-displacement curves and bearing capacities' characteristic points of both methods are in a good agreement,which all prove that the steel truss coupling beam has good ductility and good ability of dissipating earthquake energy.Parametric analyses were carried on to investigate the influences of the sections of web members and chord members,and the span-to-depth ratio on the beams' mechanical property,which can be available for reference of further research and aseismic design of the steel truss coupling beam system.
引文
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[7]Park Wan-Shin,Yun Hyun-Do.Seismic behaviour ofsteel coupling beams linking reinforced concrete shearwalls[J].Engineering Structures,2005(27):1024―1039.
[8]Park Wan-Shin,Yun Hyun-Do.Seismic behaviour anddesign of steel coupling beams in a hybrid coupled shearwall systems[J].Nuclear Engineering and Design,2006(236):2474―2484.
[9]潘志明.高层建筑剪力墙组合桁架连梁抗震性能的试验研究[D].南宁:广西大学,2007.Pan Zhiming.Experimental study of seismic behavior ofsteel composite truss coupling beams of high-rise shearwalls[D].Nanning:Guangxi University,2007.(inChinese)
[10]徐冬晓.钢桁架连梁抗震性能试验研究[D].南宁:广西大学,2008.Xu Dongxiao.Experimental research of seismic behaviorof steel truss coupling beams[D].Nanning:GuangxiUniversity,2008.(in Chinese)
[11]王连广.钢与混凝土组合结构理论与计算[M].北京:科学出版社,2005:39―42.Wang Lianguang.Theory and calculation of steel andconcrete composite structure[M].Beijing:Science Press,2005:39―42.(in Chinese)
[12]王金昌,陈页开.ABAQUS在土木工程中的应用[M].杭州:浙江大学出版社,2006:72.Wang Jinchang,Chen Yekai.The application ofABAQUS in civil engineering[M].Hangzhou:ZhejiangUniversity Press,2006:72.(in Chinese)
[2]Shahrooz B M,Deason J T,Tunc G.Outrigger beam-wall connection.I:Component testing and developmentof design model[J].Journal of the Structural DivisionASCE,2004,130(2):253―261.
[3]Shahrooz B M,Tunc G,Deason J T.Outrigger beam-wall connection.II:Subassembly testing and furthermodelling enhancements[J].Journal of the StructuralDivision ASCE,2004,130(2):262―270.
[4]Patrick J.Fortney,Bahram M Shahrooz,Gian A Rassati.Large-Scale testing of a replaceable“fuse”steel couplingbeam[J].Journal of Structural Engineering,December,2007,133(12):1801―1807.
[5]Harries Kent A,Gong Bingnian,Shahrooz Bahram M.Behavior and design of reinforced concrete,steel,andsteel-concrete coupling beams[J].Earthquake Spectra,2000,16(4):779―799.
[6]Park Wan-Shin,Yun Hyun-Do,Hwang Sun-Kyoung,Han Byung-Chan,Yang Il Seung.Shear strength of theconnection between a steel coupling beam and areinforced concrete shear wall in a hybrid wall system[J].Journal of Constructional Steel Research,2005(61):912―941.
[7]Park Wan-Shin,Yun Hyun-Do.Seismic behaviour ofsteel coupling beams linking reinforced concrete shearwalls[J].Engineering Structures,2005(27):1024―1039.
[8]Park Wan-Shin,Yun Hyun-Do.Seismic behaviour anddesign of steel coupling beams in a hybrid coupled shearwall systems[J].Nuclear Engineering and Design,2006(236):2474―2484.
[9]潘志明.高层建筑剪力墙组合桁架连梁抗震性能的试验研究[D].南宁:广西大学,2007.Pan Zhiming.Experimental study of seismic behavior ofsteel composite truss coupling beams of high-rise shearwalls[D].Nanning:Guangxi University,2007.(inChinese)
[10]徐冬晓.钢桁架连梁抗震性能试验研究[D].南宁:广西大学,2008.Xu Dongxiao.Experimental research of seismic behaviorof steel truss coupling beams[D].Nanning:GuangxiUniversity,2008.(in Chinese)
[11]王连广.钢与混凝土组合结构理论与计算[M].北京:科学出版社,2005:39―42.Wang Lianguang.Theory and calculation of steel andconcrete composite structure[M].Beijing:Science Press,2005:39―42.(in Chinese)
[12]王金昌,陈页开.ABAQUS在土木工程中的应用[M].杭州:浙江大学出版社,2006:72.Wang Jinchang,Chen Yekai.The application ofABAQUS in civil engineering[M].Hangzhou:ZhejiangUniversity Press,2006:72.(in Chinese)
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