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中文摘要：
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。
英文摘要：
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.
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