梁腹板开圆孔钢框架的抗震性能分析
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摘要
为研究梁腹板开圆孔各参数对钢框架的抗震性能影响,对梁腹板开圆孔整体钢框架的不同开孔位置、不同开孔大小建立了10个试件模型并进行非线性有限元分析,结果表明:通过对梁腹板的适当削弱能起到使框架在强震作用时塑性铰远离节点域,增加了结构的延性和耗能能力,且框架的承载能力降低不大,因此,梁腹板开圆孔型钢框架具有良好的抗震性能,并根据有限元比较结果为设计和施工提出了建议.
In order to study seismic behavior of steel moment frames with opening on beam web,nonlinear finite element analysis for ten samples with different opening position and different opening diameter was performed in the paper.Analysis indicates that reasonable opening on beam web can ensure the plastic hinge far away from the joint panel zone under severe earthquakes.It increased frames' ductility,energy dissipation capacity and low frame strength decreased.So,steel moment frames with opening on beam has well seismic-resistant behavior.Finally,suggestions on design and fabrication are presented based on the finite element simulation results.
In order to study seismic behavior of steel moment frames with opening on beam web,nonlinear finite element analysis for ten samples with different opening position and different opening diameter was performed in the paper.Analysis indicates that reasonable opening on beam web can ensure the plastic hinge far away from the joint panel zone under severe earthquakes.It increased frames' ductility,energy dissipation capacity and low frame strength decreased.So,steel moment frames with opening on beam has well seismic-resistant behavior.Finally,suggestions on design and fabrication are presented based on the finite element simulation results.
引文
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[13]HANCOCK J W,MACKENZIE AC.On the mechanisms of ductile failure in high-strength steel subjected to multi-axial stress-states[J].J.Mech.Phys.Solids,1976,24:147-169.
[2]崔鸿超.日本兵库县南部地震震害综述[J].建筑结构学报,1996,17(1):213.
[3]和心顺.无破损检测结构应力状态的方法[J].河南理工大学学报,1993,12(2):69-72.
[4]FEMA.Recommended seismic design criteria for new steel moment-frame buildings[S].FEMA-350,2000.
[5]FEMA.Post-northridge welded flange connections[S].FEMA-355D,2000.
[6]杨庆山.梁腹板开圆孔的钢框架抗震节点[J].中国安全科学学报,2005,15(2):45-50.
[7]RU J P,LI B.Connection of steel moment-resisting frames with opening on beam web[C]//The Eighth Interna-tional Symposium on Structural Engineering for Young Exports.Beijing:Science Press,2004.
[8]LI B,YANG QS.Numerical and experimental research on MRFs connection with opening on beam web[C]//FourthInternational Conference on Advances in Steel Structures.London:Elsevier,2005.
[9]中华人民共和国行业标准.JGJ99-98高层民用建筑钢结构技术规程[S].北京:中国建筑工业出版社,1998.
[10]中华人民共和国行业标准.GBJ50017-2003钢结构设计规范[S].北京:中国计划出版社,2003.
[11]Study of design of steel building in earthquake Zones[Z].Doc.ECCS-TWG 1.3,N47,1986,3/1-3/71.
[12]姚谦峰.土木工程结构试验[M].北京:中国建筑工业出版社,2001,219-220.
[13]HANCOCK J W,MACKENZIE AC.On the mechanisms of ductile failure in high-strength steel subjected to multi-axial stress-states[J].J.Mech.Phys.Solids,1976,24:147-169.
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