中柱失效工况下单层组合框架受力理论分析
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摘要
基于已有试验,本文提出了轴向弹簧和转动弹簧约束的组合框架简化计算模型,推导了在集中荷载作用下刚性、半刚性连接平面组合梁双跨钢框架移除中柱后的荷载-跨中挠度曲线计算公式,考虑了压拱效应和连接刚度的影响,将公式计算结果与试验结果进行对比证明了推导过程和计算公式的可靠性.在对比结果的基础上,根据已有试验和模拟结果对已有悬索阶段的计算公式进行修正,修正后的公式与试验结果吻合较好.
In this paper, the simplified calculation model of composite frame with axial spring and rotational spring constraints is proposed. The calculation formula of the load-deflection curve of the simplified model under concentrated load is derived,considering the influences of the arch action and the connection stiffness. The calculation results are compared with the experimental results to prove the reliability of the derivation process and calculation formula. On the basis of the comparison, the existing formula for catenary stage is modified according to the existing test and simulation results, leading to better consistency between the revised formula and the test results.
In this paper, the simplified calculation model of composite frame with axial spring and rotational spring constraints is proposed. The calculation formula of the load-deflection curve of the simplified model under concentrated load is derived,considering the influences of the arch action and the connection stiffness. The calculation results are compared with the experimental results to prove the reliability of the derivation process and calculation formula. On the basis of the comparison, the existing formula for catenary stage is modified according to the existing test and simulation results, leading to better consistency between the revised formula and the test results.
引文
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[9]王开强,李国强,杨涛春.考虑悬链线效应的约束钢梁在分布荷载作用下的性能(I)-理论模型[J].土木工程学报,2010,43(1):1-7.
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[2]HALUK S,ERGIN?,SINAN A.Resistance mechanisms in RC building frames subjected to column failure[J].Journal of Structural Engineering,1994,120(3):765-782.
[3]YIN Y Z,WANG Y C.Analysis of catenary action in steel beams using a simplified hand calculation method,part 1:theory and validation for uniform temperature distribution[J].Journal of Constructional Steel Research,2005,61(2):183-211.
[4]YIN Y Z,WANG Y C.Analysis of catenary action in steel beams using a simplified hand calculation method,part 2:validation for non-uniform temperature distribution[J].Journal of Constructional Steel Research,2005,61(2):213-234.
[5]WANG Y C,YIN Y Z.A simplified analysis of catenary action in steel beams in fire and implications on fire resistant design[J].Steel and Composite Structure,2006,6(5):367-386.
[6]石文龙.平端板连接半刚性梁柱组合节点的试验与理论研究[D].上海:同济大学,2006.
[7]IZZUDDIN B A,VLASSIS A G,NETHERCOT D A.Progressive collapse of multi-storey buildings due to sudden column loss-part I:simplified assessment framework[J].Engineering Structures,2008,30(5):1308-1318.
[8]VLASSIS A G,IZZUDDIN B A,NETHERCOT D A.Progressive collapse of multi-storey buildings due to sudden column loss-part II:application[J].Engineering Structures,2008,30(5):1424-1438.
[9]王开强,李国强,杨涛春.考虑悬链线效应的约束钢梁在分布荷载作用下的性能(I)-理论模型[J].土木工程学报,2010,43(1):1-7.
[10]高山.组合梁平面钢框架抗连续倒塌性能研究[D].哈尔滨:哈尔滨工业大学,2014.
[11]赵鸿铁,张素梅.组合结构设计原理[M].北京:高等教育出版社,2005.
[12]Commission of European Communities,EC-3.Design of steel structures,part 1.8,design of joints[S].Brussels:European Committee for Standardization,2005.
[13]高山,郭兰慧,吴兆旗,等.关键柱失效后组合框架抗倒塌试验研究及理论分析[J].建筑结构学报,2013,34(4):43-48.