In the paper, spear lag of beam plated construction and effective distribution width of flange plate are analysed through model test and research. It provides a reference in design.

本文通过大型试验的研究，分析梁板结构截面的剪力滞效应，及翼缘板的有效分布宽度，为设计提供参考。

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We put the concrete flange plate of the composite beam into the steel ones according to the elastic modulus ratio and keep the width of section unchanged, as a result, get a equivalent section.

将组合梁中混凝土翼缘板厚度按弹性模量之比换算，并保持宽度不变形成等效截面。

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At the theories part, this paper studies the flange plate effective width of composite truss.

在理论部分，研究了组合桁架的翼缘有效宽度。

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