设为首页 |  加入收藏
首页狗万aap狗万要实名制狗万是什么意思啊稿 约征订启事合作办刊联系我们English
 
波形钢腹板曲线结合梁弯扭效应的解析解推导及参数分析
作者:李运生1 陈留剑1 刘蓓1 杨斌2 陈铁1 张彦玲1 
单位:1. 石家庄铁道大学 土木工程学院, 河北 石家庄050043;2. 中国铁路总公司 工程管理中心, 北京100844
关键词:曲线结合梁  波形钢腹板  弯扭效应  解析解  能量变分法 
分类号:
出版年·卷·期(页码):2019·41·第1期(101-108)
摘要:

为了研究波形钢腹板曲线结合梁的弯扭效应,基于波形钢腹板的特点,综合考虑曲率影响、截面剪力滞效应、波形腹板剪切效应、扭转和畸变效应,采用能量变分法推导了波形钢腹板简支曲线结合梁在弯扭作用下的控制微分方程,采用伽辽金法求解得到了其弯扭效应的解析解,并对曲线半径和圆心角进行了参数分析。随曲线半径的增大,波形钢腹板简支曲线结合梁的跨中挠度、扭转角、畸变角和剪力滞附加弯矩均增大,但扭弯应力比减小;随圆心角的增大,跨中挠度、扭转角和畸变角均增大,剪力滞附加弯矩基本不变,扭弯应力比则线性增加。说明曲线半径的减小和圆心角的增大,可使波形钢腹板简支曲线结合梁的扭转效应增强,弯曲特性减弱,圆心角和曲线半径是表征其弯扭效应的两个重要指标。

In order to study the bending-torsional behavior of the curved composite beam with corrugated steel webs, considering the characteristics of the corrugated steel webs, the influence of the curvature, the cross-section shear lag, the vertical shear deformation, and the torsional and distortional deformation, the control differential equations of simply supported curved composite beams with corrugated steel webs under bending-torsional effects were deduced using energy-variational principle. The analytical results were obtained by Galerkin method, and parametrical analysis was conducted on the curve radius and central angle. The analysis shows that, for a simply-supported curved composite beam with corrugated steel webs, the mid-span deflection, torsional angle, distortional angle and additional shear lag moment all develop with the increase of the curve radius, while the torsional-bending stress ratio decreases. With the increase of the central angle, the mid-span deflection, torsional and distortional angle all increase, while the additional shear lag bending moment almost remains unchanged, and the torsional-bending stress ratio increases linearly. The results indicate that, the decrease of the radius and the increase of the central angle can strengthen the torsional behavior but weaken the bending behavior. The radius and central angle are two key indexes to determine the bending-torsional behavior of the simply-supported curved composite beam with corrugated steel webs.

参考文献:
服务与反馈:
文章下载】【发表评论】【查看评论】【加入收藏
提示:您还未登录,请登录!点此登录
 
友情链接   更多

地址:北京复兴路10号  中国铁道学会《狗万aap_狗万要实名制_狗万是什么意思啊》编辑部    邮编:100844      电话:(010)51848021 / 51847501 
传真:(010)51892424       邮箱:tdxb@vip.163.com   京ICP备09031577号