车辐结构平面内弹性稳定承载力及设计建议  

In-plane elastic stability of spoke structures

作　　者：郭彦林[1] 王高宁[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《空间结构》2006年第1期18-23,共6页Spatial Structures

基　　金：国家自然科学基金项目(50478013)

摘　　要：车辐结构是一种新颖的索拱杂交结构,其稳定性能比纯拱结构有很大改善.本文根据非线性有限元理论,对20m、50m、80m三种不同跨度的车辐结构在全跨均布荷载和半跨均布荷载作用下进行了全过程稳定承载力研究;基于拱的矢跨比和索盘高度两个参数,从稳定极限承载力和位形变化两个方面对车辐结构的受力性能进行阐述.通过对大量算例及数值结果进行分析及比较,提出了车辐结构适用的矢跨比和索盘高度的变化范围,对工程设计有借鉴意义.Spoke structures hybridized by arch and cables behave better than pure arch structures in stability and global stiffness. The in-plane elastic stability of spoke structures under full and half span uniformly distributed load is investigated respectively in this paper by employing the nonlinear finite element method. The parameters focused in the analysis are the span ranging from 20m to 80m, the ratio of rise to span and the cable hub position. Ultimate load-carrying capacity, load-displacement curves and deformation configuration corresponding to different loading levels are demonstrated and compared. Some conclusions obtained from numerical studies are helpful to the design of spoke structures.

关 键 词：车辐结构 拱结构 稳定极限承载力 变形过程 

分 类 号：TU311.2[建筑科学—结构工程]