平面钢管桁架拱平面内稳定承载力的参数分析  

Analysis on Influencing Factors for the In-Plane Stability Problems of Plane Tubular Truss-arch

作　　者：刘旭[1] 黄政华[1] 黄勇[1] 

机构地区：[1]贵州大学土木工程学院,贵阳550003

出　　处：《贵州大学学报（自然科学版）》2013年第6期118-121,共4页Journal of Guizhou University:Natural Sciences

基　　金：贵州省科学技术基金黔科合J字[2011]2321号

摘　　要：对平面钢管桁架拱采用有限元软件ANSYS进行分析,对影响平面钢管桁架拱平面内稳定性的高跨比、矢跨比、腹杆与弦杆外径的比值等几何参数进行研究,考虑了全跨、半跨竖向均布荷载的荷载效应。分别进行了特征屈曲分析、非线性分析,得到各项几何参数对平面钢管桁架拱的面内稳定承载力的影响程度,找出对平面钢管桁架拱平面内稳定性起控制作用的参数,并通过考虑用钢量得到最经济的参数取值范围。The finite element models of plane tubular trusses were discussed. By using the nonlinear finite element software ANSYS, the influencing factors for the in-plane stability problems of plane tubular trusses were studied. The influencing factors include depth-span ratio, rise span ratio, the ratio of web number and chord and lateral strut. Two types of vertical load were considered in the analysis, namely, full-span, half-span uniformly distributed load. The parameters of the control of the in-plane stability were found through buckling analysis and nonlinear analysis. And by considering the amount of steel, the range of economy parameters was found.

关 键 词：平面钢管桁架拱 平面内稳定性 参数分析 经济性 

分 类 号：TU391[建筑科学—结构工程]