平面钢管桁架拱平面外稳定承载力的参数分析  

Factors Analysis of Out-Plane Stability for Plane Tubular Truss-arches

作　　者：李睿[1] 黄政华[1] 黄勇[1] 

机构地区：[1]贵州大学土木建筑工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2013年第4期94-97,共4页Journal of Guizhou University:Natural Sciences

基　　金：贵州省科学技术基金项目;黔科合J字[2011]2321号

摘　　要：介绍了桁架拱的分类和失稳特点,对平面桁架拱的有限元模型进行了讨论。采用有限元软件ANSYS分析,对影响平面钢管桁架拱的稳定性的各项几何参数进行研究,几何参数包括结构的高跨比、矢跨比、腹杆与弦杆的比值以及侧向支撑。分别进行了特征屈曲分析和考虑初始缺陷的双重非线性分析,得到各几何参数对平面钢管桁架拱的面外稳定承载力的影响程度。找出对平面钢管桁架拱平面外稳定性起控制作用的参数,从而为一般荷载作用下的平面钢管桁架拱的稳定承载力的设计提供参考。This paper presents the Classification and the instable characteristic of plane tubular trusses and discus- ses the finite element models of plane tubular trusses. By using the nonlinear finite element software ANSYS, the influencing factors for the out-plane stability problems of plane tubular trusses was studied. The influencing factors include depth-span ratio, rise span ratio, the ratio of web number and chord and lateral strut. The main methods include buckling analysis and nonlinear analysis. The parameters of the control of the out-plane stability were found. Finally basic method and procedure for stability analysis of plane tubular truss-arch were presented.

关 键 词：平面钢管桁架拱 平面外稳定性 参数分析 

分 类 号：TU323.4[建筑科学—结构工程]