Abstract

Info

Title:: Elasticplastic Post-buckling Analysis on Articulated Single-layer Reticulated Shells with Curved Lever Unit

Author(s):: LIU Shu-tang; ZHU Wen-zheng; School of Civil Engineering, Guangzhou University

Keywords:: curved lever unit; tangent stiffness matrix; single-layer reticulated shell; post-buckling analysis; elastic-plastic buckling; generalized displacement control method

Abstract:: The accurate tangent stiffness matrix formula of curved lever unit at elastic and elastic-plastic states was derived based on stress-chord length relation and matrix differential theory. The research component was ideal elastic plastic material. The structure support included 2 kinds of constraint conditions of the fixed hinge support and the movable hinge support. The initial bending of the component was considered, the tangent stiffness matrix of curved lever unit and the generalized displacement control method were adopted, and the structure weight was taken as the reference load. The elastic and plastic post-buckling analysis of K8 largespan single layer reticulated shell structures was carried out. The results show that the tangent stiffness matrix of curved lever unit is accurate, and can be used to the elastic-plastic post-buckling analysis of large hinged single layer reticulated shells.