A new 3-D element formulation on displacement of steel-concrete composite box beam  

作　　者：周凌宇 余志武 贺桂超 

机构地区：[1]School of Civil Engineering,Central South University

出　　处：《Journal of Central South University》2013年第5期1354-1360,共7页中南大学学报（英文版）

基　　金：Project(50708112) supported by the National Natural Science Foundation of China;Project(IRT1296) supported by the Program for Changjiang Scholars and Innovative Research Team in University

摘　　要：Slip of a composite box beam may reduce its stiffness, enlarge its deformation and affect its performance. In this work, the governing differential equations and boundary conditions of composite box beams were established. Analytic solutions of combined differential equations were also established. Partial degree of freedom was adopted to establish a new FEA element of three-dimensional beam, taking into account the slip effect. Slip and its first-order derivative were introduced into the nodes of composite box beams as generalized degree of freedom. Stiffness matrix and load array of beam elements were established. A three-dimensional nonlinear calculation program was worked out. The results show that the element is reliable and easy to divide and is suitable for special nonlinear analysis of large-span composite box beams.Slip of a composite box beam may reduce its stiffness, enlarge its deformation and affect its performance. In this work, the governing differential equations and boundary conditions of composite box beams were established. Analytic solutions of combined differential equations were also established. Partial degree of freedom was adopted to establish a new FEA element of three-dimensional beam, taking into account the slip effect. Slip and its first-order derivative were introduced into the nodes of composite box beams as generalized degree of freedom. Stiffness matrix and load array of beam elements were established. A three-dimensional nonlinear calculation program was worked out. The results show that the element is reliable and easy to divide and is suitable for special nonlinear analysis of large-span composite box beams.

关 键 词：steel-concrete composite box beam shear deformation slip effect variational method finite beam element method 

分 类 号：TU398.9[建筑科学—结构工程]