结合梁板单元的位移模式研究  

The study for the displacement model of the composite beam-plate elements

作　　者：陈玉骥[1] 罗旗帜[1] 

机构地区：[1]佛山科学技术学院土木工程与建筑系,广东佛山528000

出　　处：《湖南科技大学学报（自然科学版）》2010年第4期74-77,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(50378019);广东省自然科学基金资助项目(9151063101000050)

摘　　要：提出了一种考虑梁板相对滑移和板剪滞效应的结合梁板单元.以矩形板中面4个结点的结点位移、板梁结合面3个点的相对滑移和板中线上3个点的剪滞翘曲位移作为单元的基本自由度,构造了板和梁的位移模式.其中以板的位移模式为主,梁的位移模式则根据板和梁之间的变形协调条件来确定.通过一个钢-混凝土结合梁试验模型的计算,结果表明,根据提出的结合梁板单元得到的结果与试验值和常规有限元的结果较为吻合,说明了此方法的可靠性.A composite beam-plate element,which consider the influence of the relative slip between plates and beams as well as the shear lag in plates,was put up.The displacement mode of the composite beam-plate element was made by the basic displacement degrees of the element which include the node displacements of 4 nodes on rectangular plates,the relative slips of 3 nodes at combing surface between steel beams and concrete plates as well as the shear lags of 3 nodes in concrete plates.The displacement mode of plates was given firstly.The displacement mode of beams was determined by the deformation-harmony condition between beams and plates.It is shown that from the computation with a steel-concrete composite beam test model that the results by useing the composite beam-plate element are agreement with those of the test and the conventional finite element method.It explains the reliable of the proposed method.

关 键 词：结合梁板单元 位移模式 相对滑移 剪滞效应 

分 类 号：U443.35[建筑科学—桥梁与隧道工程]