平端板连接半刚性梁柱组合节点的弯矩-转角模型
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摘要
目的研究半刚性连接弯矩-转角关系,为半刚性组合框架设计提供依据.方法采用连接弯矩-转角关系的数学模型模拟方法,并利用4个平端板连接半刚性梁柱组合节点的拟动力试验和低周反复荷载试验的结果进行验证.结果给出了平端板连接半刚性梁柱组合节点弯矩-转角关系的模型,包括单调加载和循环加载模型.在单调荷载作用下,连接的弯矩-转角关系曲线有三线性和幂函数两种形式;在循环荷载作用下,给出的连接滞回模型同样包含两种形式:第一种,骨架曲线采用与单调荷载作用下相同的三线性形式,滞回曲线采用最大点指向形式;第二种,骨架曲线采用与单调荷载作用下相同的三参数幂函数形式,而滞回曲线同前.结论与现有试验数据的比较表明,给出的平端板连接弯矩-转角关系模型与试验结果吻合较好,可供工程设计使用.
Moment-rotation models of semi-rigid composite beam-to-column joints with flush end plate connection was studied.The moment-rotation models of connection were derived by mathematical simulation and verified by experimental results of four specimen tested under pseudo dynamic load and low cyclic load.The models of moment-rotation relationship of flush end-plate composite connections were put forward for the monotonic loading and cyclic loading.Under monotonic loading,the curves of moment-rotation relationship of composite connections included these two parts:trilinear model and power function model.Under cyclic loading,the hysteretic models included two parts too.First,the skeletal curves of composite connections were trilinear,and the hysteretic curves were max-oriented.Second,the skeletal curves of composite connections were power function models,while the hysteretic curves were the same as those of the former.The models given show good agreement with the experimental results and can be used for practical engineering design.
Moment-rotation models of semi-rigid composite beam-to-column joints with flush end plate connection was studied.The moment-rotation models of connection were derived by mathematical simulation and verified by experimental results of four specimen tested under pseudo dynamic load and low cyclic load.The models of moment-rotation relationship of flush end-plate composite connections were put forward for the monotonic loading and cyclic loading.Under monotonic loading,the curves of moment-rotation relationship of composite connections included these two parts:trilinear model and power function model.Under cyclic loading,the hysteretic models included two parts too.First,the skeletal curves of composite connections were trilinear,and the hysteretic curves were max-oriented.Second,the skeletal curves of composite connections were power function models,while the hysteretic curves were the same as those of the former.The models given show good agreement with the experimental results and can be used for practical engineering design.
引文
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[2]Yee Y L,Yee R E M.Moment-rotation curves forbolted connections[J].Journal of Structural Engi-neering,1993,112(3):615-635.
[3]Frye J M,Morris G A.Analysis of flexibly connectedsteel frames[J].Canadian Journal of Civil Engineer-ing,1975,2(3):280-291.
[4]Jones S W,Kirby P A,Nethercot D A.Effect ofsemi-rigid connections on steel column strength[J].Journal of Steel Construction Research,1980,36(1):38-46.
[5]Krishnamurthy N.A fresh look at bolted end-platebehavior and design[J].Engineering Journal,1978,15(2):39-49.
[6]Wu F H,Chen W F.A design model for semi-rigidconnections[J].Engineering Structures,1990,12(2):88-97.
[7]中华人民共和国建设部.GB50017-2003钢结构设计规范[S].北京:中国计划出版社,2003.
[8]陈惠发,周绥平.钢框架稳定设计[M].上海:世界图书出版社,1999.
[9]李杰,李国强.地震工程学导论[M].北京:地震出版社,1992.
[10]中国工程建设标准化协会.CECS102:2002门式刚架轻型房屋钢结构技术规程[S].北京:中国建筑工业出版社,2003.
[11]李国强,沈祖炎.考虑节点剪切变形的钢框架弹塑性地震反应分析[J].同济大学学报,1990,18(1):1-9.
[12]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:同济大学土木工程学院,2006.
[13]孙飞飞,李国强.梁柱组合节点的试验研究新进展[J].建筑钢结构进展,2004,6(2):37-42.
[14]肖勇.组合节点和框架的分析与设计[J].建筑钢结构进展,2002,4(3):13-19.
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