考虑组合效应的梁腹板开圆孔型节点抗震性能试验研究
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摘要
为考察楼板组合效应对腹板开圆孔节点滞回性能、破坏机理、塑性铰形成位置的影响,设计并完成考虑组合效应的梁腹板板开圆孔型节点足尺试件的拟静力试验。通过试验现象,阐述试验试件破坏全过程,揭示该类节点的破坏机理。基于ANSYS分析平台,建立试验试件的有限元模型,数值模拟结果与试验结果的对比验证了有限元分析方法的合理性。结合以往试验获得数据,建立考虑组合效应开圆孔、不考虑组合效应开圆孔、不考虑组合效应不开圆孔等3种节点对比模型,讨论楼板组合效应对节点破坏形式、滞回性能、塑性区分布的影响。研究结果表明,组合效应对腹板开圆孔节点的性能影响不可忽略;选择合理的削弱参数,梁腹板开圆孔型节点可以达到塑性铰外移的效果。
To investigate the influence of composite effect of floor labs on the hysteretic behavior,failure mechanism and plastic hinge location of the connections with opening on beam web(OBW),the pseudo-static test of full-scale specimens of OBW connection including floor slab was carried out.From the experimental results,the failure process and the failure mechanism of OBW connections considering composite effect are illustrated.Based on ANSYS software,the numerical analysis model of OBW connection including floor slab is established.The analysis results agree well with the experimental ones,which verifies the validity of the numerical model.On the basis of experimental data,three kinds of numerical analysis models are established,including the OBW connections with floor slab,OBW without floor slab and the connection without OBW and floor slab.The composite effects on the performance of the OBW connections are discussed,such as hysteretic behavior,failure mode and plastic zone distribution.The research results show that the influence of composite effect on the OBW connection can not be ignored.It is also found that plastic hinge of OBW connection including floor slabs could move to the weakened areas and be away from the end of the beam when weakening parameters are properly selected.
To investigate the influence of composite effect of floor labs on the hysteretic behavior,failure mechanism and plastic hinge location of the connections with opening on beam web(OBW),the pseudo-static test of full-scale specimens of OBW connection including floor slab was carried out.From the experimental results,the failure process and the failure mechanism of OBW connections considering composite effect are illustrated.Based on ANSYS software,the numerical analysis model of OBW connection including floor slab is established.The analysis results agree well with the experimental ones,which verifies the validity of the numerical model.On the basis of experimental data,three kinds of numerical analysis models are established,including the OBW connections with floor slab,OBW without floor slab and the connection without OBW and floor slab.The composite effects on the performance of the OBW connections are discussed,such as hysteretic behavior,failure mode and plastic zone distribution.The research results show that the influence of composite effect on the OBW connection can not be ignored.It is also found that plastic hinge of OBW connection including floor slabs could move to the weakened areas and be away from the end of the beam when weakening parameters are properly selected.
引文
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[2]李波,杨庆山.梁腹板开圆孔节点的分析模型[J].北京交通大学学报,2009,33(4):101-105(Li Bo,YangQingshan.Analysis model of beam-to-column connectionwith opening in beam web[J].Journal of Beijing JiaotongUniversity,2009,33(4):101-105(in Chinese))
[3]李波,杨庆山,杨娜.采用腹板开孔型梁柱节点的钢框架抗震性能试验研究[J].建筑结构学报,2008,28(6):160-166(Li Bo,Yang Qingshan,Yang Na.Experimentalresearch on aseisimic behavior of steel moment-resisting Frame[J].Jounal of Building Structures,2008,28(6):160-166(inChinese))
[4]茹继平.梁腹板开圆孔节点及钢框架抗震性能的实验研究[D].北京:北京交通大学,2005(Ru Jiping.Experimental studies on aseismic behaviors of connectionsand moment resisting frame with opening on beam web[D].Beijing:Beijing Jiaotong University,2005(inChinese))
[5]李波.梁腹板开圆孔的钢框架抗震性能研究[D].北京:北京交通大学,2006(Li Bo.Seismic behaviors ofsteel moment resisting frame including connections withopening in beam web[D].Beijing:Beijing JiaotongUniversity,2006(in Chinese))
[6]Yang Q,Li B,Yang N.Aseismic behaviors of steel momentresisting frames with opening in beam web[J].Journal ofConstructional Steel Research,2009,65(6):1323-1336
[7]徐爱红,陈宏,石永久,等.组合效应对高层钢框架梁柱节点脆性破坏的影响分析[J].四川建筑科学研究,2007,33(4):90-93(Xu Aihong,Chen Hong,ShiYongjiu,et al.Effect of composite action on the fracture ofbeam-to-column connections in high-rise steel frames[J].Sichuan Building Science,2007,33(4):90-93(inChinese))
[8]聂建国.钢-混凝土组合梁结构:试验、理论与应用[M].北京:科学出版社,2005
[9]石永久,苏迪,王元清.考虑组合效应的钢框架梁柱节点恢复力模型研究[J].世界地震工,2008,24(2):15-20(Shi Yongjiu,Su Di,Wang Yuanqing.Study onrestoring force models of steel beam-column connectionswith composite action[J].World Earthquake Engineering,2008,24(2):15-20(in Chinese))
[10]Chen S J,Chao Y C.Effect of composite action on seismicperformance of steel moment connections with reducedbeam sections[J].Journal of Constructional SteelResearch,2001,57(4):417-434
[11]董硕.正弯矩作用下平齐式端板连接组合节点的试验研究[D].南京:南京工业大学,2006(Dong Shuo.Experimental research on behavior of flush end-platecomposite joints under positive moment[D].Nanjing:Nanjing University of Technology,2006(in Chinese))
[12]苏迪,石永久,王元清.组合效应对钢节点抗震性能的影响因素分析[J].青岛理工大学学报,2006,27(1):36-41(Su Di,Shi Yongjiu,Wang Yuanqing.Influencefactor analysis of seismic performance of steel beam-columnmoment connections with composite effect[J].Journal ofQingdao Technological University,2006,27(1):36-41(inChinese))
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