【摘要】 本文从各构件的稳定微分方程出发,推导出整体结构的弯扭耦联稳定微分方程。用Gale-Kin 法求解方程并获得整体结构的最小临界荷载。由此可以求出结构整体失稳时各构件所应分配的荷载。这对于正确选择结构的平面形式和高宽比,适当调整各个构件在平面中的位置以及合理决定每个构件的截面尺寸都是有意义的。更多还原

【Abstract】 In this paper,from the differential equations of stability for every brace,a group of monolithic differential equations of stability,in which bending and torsion are coupled,has been berived.The Galerkin method has been employed in solving the equations and a minimum monolithic critical load has been obtained.Then it is easy to gain the loads which would be borne by every brace when monolithic instability happened.These figures will be significative of correctly selecting the plane-form and the ratio of the height and the width of the structure,of reasonably adjusting the positions of various braces in plane and of rationaly determining the size of cross-sction for every brace.更多还原