A box girder was decomposed splint constructions and simple strength of material relations was used to derive membrane force equations.
将箱型梁分解成薄板结构，应用简单的强度与材料关系，导出箱型梁的薄膜方程。
A box girder was decomposed splint constructions and simple strength of material relations was used to derive membrane force equations.
将箱型梁分解成薄板结构，应用简单的强度与材料关系，导出箱型梁的薄膜方程。
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