波形钢腹板工字型钢梁的手风琴效应研究  

Study on accordion effect of corrugated steel webs i-shaped steel girde

作　　者：林梦凯[1] 冀伟[1] 李海莲[1] 赵海平[1] 李春涛[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《铁道科学与工程学报》2016年第2期283-288,共6页Journal of Railway Science and Engineering

基　　金：长江学者和创新团队发展计划资助项目(IRT1139);国家自然科学基金资助项目(51268032)

摘　　要：波形钢腹板工字型钢梁由于其手风琴效应,使腹板不承受轴向力。采用波形钢腹板代替普通工字型钢梁的平腹板,充分利用波形钢腹板可以提供较强的面外刚度而消除腹板加劲肋的布置,同时能够提高预应力的施加效率。以波形钢腹板工字型钢梁的手风琴效应为研究对象,提出截面的抗弯刚度折减系数来评价波形钢腹板工字型钢梁的手风琴效应并确定其影响因素。利用有限元软件建立模型梁计算截面抗弯刚度折减系数并分析其影响因素,经理论公式和室内模型试验验证了有限元模型的正确性。Because of the accordion effect, I - girder with corrugated gated steel webs were used to replace ordinary flat webs of I - shaped steel webs does not bear axial force. Corru- steel girder. It can not only provide stronger outer surface stiffness and eliminate the layout of stiffeners, but also improve the applied efficiency of prestress. This paper took the accordion effect of I - girder with corrugated steel webs as the research object and proposed flexural rigidity reduction factor of section to evaluate the accodion effect and determine its influencing factors. The model of girder was established to calculate the flexural rigidity reduction factor of section and analyze the influencing factors by using the finite element software. The correctness of the finite element model was veri- fied by theoretical formula and indoor model test.

关 键 词：桥梁工程 手风琴效应 有限元分析 波形钢腹板 工字型钢梁 抗弯刚度折减系数 

分 类 号：TU392.1[建筑科学—结构工程]