梁柱连接节点不同腹板切角构造形式的应力分析
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摘要
地震中钢框架的破坏大量表现为梁柱连接节点的破坏,其破坏形式和破坏性质与节点细部构造密切相关,梁柱连接节点不同腹板切角构造形式(又称作工艺孔)是主要影响因素之一.借助有限元技术,对梁柱栓焊混合连接节点中不同腹板切角构造形式进行研究,揭示不同切角形式切角部位应力集中程度及应力分布规律,又通过对4种不同腹板切角构造形式节点的滞回性能分析,综合得出圆弧Ⅱ形切角及扇形切角为较理想的切角形式.
The majority of damage of the steel frame in earthquake takes the form of destruction of beam-column joints and the failure mode and failure properties are closely related to the details of joint structure,among them the web corner cutting forms(also known as technological hole) of the beam-column joints is one of the main influencing factors.With the help of the finite element technique,different web corner cutting forms of the Beam-column bolt-weld mixed connection joints were studied,revealing the degree of stress concentration and stress distribution for different web corner cutting forms.In addition,by means of analyzing hysteretic performance of four different web corner cutting forms of the joints,it was comprehensively obtained that type-Ⅱ arc corner cutting and sectorial corner cutting were the ideal cutting forms.
The majority of damage of the steel frame in earthquake takes the form of destruction of beam-column joints and the failure mode and failure properties are closely related to the details of joint structure,among them the web corner cutting forms(also known as technological hole) of the beam-column joints is one of the main influencing factors.With the help of the finite element technique,different web corner cutting forms of the Beam-column bolt-weld mixed connection joints were studied,revealing the degree of stress concentration and stress distribution for different web corner cutting forms.In addition,by means of analyzing hysteretic performance of four different web corner cutting forms of the joints,it was comprehensively obtained that type-Ⅱ arc corner cutting and sectorial corner cutting were the ideal cutting forms.
引文
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[2]崔鸿超.日本兵库县南部地区地震震害综述[J].建筑结构学报,1996,17(1):2-13.
[3]杨强跃,郑悦.钢框架梁柱节点连接方式的介绍与分析[J].建筑结构,2004(6):44-48.
[4]刘其祥,蔡益燕,朱知信,等.多高层房屋钢结构梁柱刚性连接节点的抗震设计[J].建筑结构,2001,31(8):9-12.
[5]杨尉彪,高小旺,张维嶽,等.高层建筑钢结构梁柱节点试验研究[J].建筑结构,2001(8):3-8.
[6]肖利平.钢框架梁柱节点脆性破坏的分析与改进[J].有色冶金设计与研究,2004,25(4):28-31.
[7]韦灼彬.扇形切角构造对钢框架梁柱焊接节点抗震性能影响的研究[J].工业建筑,2007,37(7):78-81.
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