大跨交叉网架拱结构的稳定性分析
- 摘 要
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罗尧治 曹立岭 沈雁彬 马政纲 (浙江大学空间结构研究中心 杭州 310027)张小明 (广东顺德建筑设计院 528300)
[提要] 结合实际工程介绍了螺栓球钢管拱结构的应用,并采用有限元非线性分析理论对人跨度交叉网架拱结构稳定性进行全过程跟踪分析,讨论了交叉网架拱在横向与竖向荷载不『司比例作用下的稳定性能。最后,得出具有实际应用价值的结论。
[关键词] 网架拱结构 整体稳定性 几何非线性分析
The crosscd-arch latticcd truss has large span,small cross width and wcak out-plane stiffncss. It's ncccssary to tcst the stability as wcll as analyze the strcngth of the arch structurcs. The nonlincar finite clcmcnt analysis of largc-span crosscd-arch latticcd truss is studicd,and a thorough invcstigation on the corresponding stability is taken undcr the influcnce of diffcrcnt proportional cocfficicnts of the x-dircction load to rhe z-dircction load. Finally the practically applicable conclusions arc achicvcd.
Keywords: crosscd-arch latticcd structurcs; g!obal stability; nonlincar finite clcmcnt analysis