Take the first cross section as an example, and the calculation formula of flexural capacity of composite beams is obtained by using the error transfer formula of mathematical statistics.

运用数理统计学的误差传递公式，推导出了组合梁截面抗弯承载力统计参数的计算公式（以第一类截面为例）。

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A laminated composite bar of rectangular cross section consists of a middle portion of one material as well as upper and lower identical cover plates of another material.

一矩形横截面的叠层复合材料杆，由以一种材料为中心部分，及另一种材料的上下两相同的盖板所组成。

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Gucheng bridge is a steel tube concrete bowstring arch and variable cross section continuous beam composite system through bridge with single load plate.

古城大桥是一座下承式单承载面钢管混凝土系杆拱与变截面连续梁组合体系桥梁。

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