纯压抛物线拱平面内稳定性及设计方法研究  

In-plane stability behavior and application of parabolic arches under pure compression

作　　者：林冰[1] 郭彦林[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《建筑结构学报》2009年第3期103-111,共9页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50478013)

摘　　要：采用大挠度弹塑性有限单元法对全跨竖向均布荷载作用下纯压抛物线拱平面内稳定承载力进行研究,考虑材料非线性、焊接残余应力、初始几何缺陷、矢跨比和支承条件等因素的影响,得到了热轧圆管截面、焊接工字形截面和焊接箱形截面纯压三铰、两铰和无铰抛物线钢拱的平面内稳定性设计曲线,给出纯压抛物线钢拱的平面内稳定设计公式。以拱的正则化长细比为基本参数,统一了三铰、两铰和无铰纯压抛物线钢拱的平面内稳定设计曲线,可用于全跨竖向均布荷载作用下纯压抛物线钢拱的平面内稳定性设计,同时可供实际设计时使用和制定有关规程时参考。This paper presents the in-plane inelastic subjected to vertical load uniformly distributed on a initial geometric crookedness, rise-to-span ratios, and stability analysis and design procedure of steel parabolic arch horizontal projection. Material inelasticity, residual stresses, supports condition are considered in the analysis. The unified stability design curves of rolled circular tubes, welded I-sections, and welded box sections steel parabolic arch are obtained by employing a normalized slenderness reflecting the influences of different boundary conditions. The proposed curves can be directly used in practical design of parabolic arches in pure compression.

关 键 词：纯压抛物线拱 有限单元法 平面内稳定承载力 稳定性设计曲线 

分 类 号：TU393.3[建筑科学—结构工程] TU311.41