A new 3-D element formulation on displacement of steel-concrete composite box beam
来源期刊：中南大学学报(英文版)2013年第5期
论文作者：ZHOU Ling-yu(周凌宇) 余志武 HE Gui-chao(贺桂超)
文章页码：1354 - 1360
Key words：steel-concrete composite box beam; shear deformation; slip effect; variational method; finite beam element method
Abstract: 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.
ZHOU Ling-yu(周凌宇), YU Zhi-wu(余志武), HE Gui-chao(贺桂超)
(School of Civil Engineering, Central South University, Changsha 410075, China)
Abstract: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.
Key words:steel-concrete composite box beam; shear deformation; slip effect; variational method; finite beam element method
