Optimization for Maximum Nonlinear Buckling Load and Topics on Imperfection of Latticed Shells  

作　　者：Pei-Shan Chen 

机构地区：[1]Department of Civil Engineering and Architecture & Graduate School, Hachinohe Institute of Technology, Aomori 031-8501, Japan

出　　处：《Journal of Civil Engineering and Architecture》2014年第2期143-150,共8页土木工程与建筑（英文版）

摘　　要：The present paper represents comparison of continuum shells and latticed shells with qualitative analysis. For shells, the mechanical characteristics in the two perpendicular directions are continuous and related to each other, and any change in thickness will result in change in stiffness in any direction. In latticed shells, members are discrete and stiffnesses in two mutually perpendicular directions are discontinuous and independent of each other. Therefore, sensitivity of geometrical imperfection for buckling of latticed shells should be different from that of continuum shells. The author proposes a shape optimization method for maximum buckling load of a latticed shell. A single layer latticed dome is taken as a numerical example, and the results show that the buckling load parameter for full area loading case increases 32.75% compared to that of its initial shape. Furthermore, the numerical example demonstrates that an optimum latticed shell with maximum buckling load, unlike an optimum continuum shell, may not be sensitive to its geometrical imperfection.

关 键 词：Latticed shell shape optimization buckling load IMPERFECTION sensitivity analysis state of the art space frame. 

分 类 号：TU356[建筑科学—结构工程] TB330.1[一般工业技术—材料科学与工程]