露出型钢柱脚低多层钢框架结构动力响应机理  

Dynamic response mechanism of exposed steel column base in low and multistory steel frame structure

作　　者：包恩和[1] 王天成 孙凌云 BAO Enhe;WANG Tiancheng;SUN Lingyun(College of Civil Engineering and Architecture,Guilin University of Technology,Guilin,Guangxi 541004,China;College of Civil Engineering and Architecture,Guangxi University,Nanning,Guangxi 530004,China;College of Architecture Engineering,Hezhou University,Hezhou,Guangxi 542899,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]广西大学土木建筑工程学院,广西南宁530004 [3]贺州学院建筑工程学院,广西贺州542899

出　　处：《江苏大学学报（自然科学版）》2018年第4期478-484,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：广西高等学校科学研究项目(KY2015YB505);广西高等学校特色专业及课程一体化建设项目(GXTSZY232)

摘　　要：针对露出型钢柱脚低多层钢框架动力响应机理不明确,首先定义考虑变动轴力影响的露出型钢柱脚滑移型滞回曲线模型;以框架形状、露出型钢柱脚强度系数为主要研究参量,建立13个低多层规则钢框架模型;通过弹塑性时程分析,研究动力响应.研究结果表明:随着露出型钢柱脚强度系数变小,各模型首层位移角增大,而第2层层间位移角减小;露出型钢柱脚强度系数≤0.6时,3层规则钢框架模型首层变形集中较大,6层规则钢框架模型最大层间位移分布较均匀;3层模型塑性变形能量主要集中于首层梁端,6层规则钢框架模型塑性变形能量向各层趋于均匀分布;露出型钢柱脚动力响应滞回曲线的形状和屈服弯矩等较好地吻合所提出的露出型钢柱脚滑移型滞回曲线模型.To investigate the dynamic response mechanism of exposed steel column base in low and multistory steel frame structure, the model of slip hysteresis loop for exposed steel column base was defined with the consideration of the influence of varying axial force. The 13 low and multistory regular steel frame models were established based on the main research parameters of frame shape and strength factor of exposed steel column base. The dynamic response was analyzed by elasticplastic timehistory analysis. The results show that the first layer displacement angle is increased, while the second layer displacement angle is decreased with the decreasing of strength factor of exposed steel column base.When the strength factor of exposed steel column base is less than or equal to 0.6, the first floor deformation is centralized for 3layer model, while the distribution of the maximum layer displacement for 6layer model is nearly uniform. The plasticdeformation energy for 3layer model is centralized on the beam end of the first layer, and the distribution of plasticdeformation energy for 6layer model is nearly uniform. The hysteresis curve shape of dynamic response and the yield moment are consistent with those of the proposed slip hysteresis loop model for exposed steel column base.

关 键 词：露出型钢柱脚 滑移型滞回曲线模型 强度系数 非线性时程分析 动力响应 

分 类 号：TU391[建筑科学—结构工程]