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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Negative bending moment nearby the middle supports of composite steel-concrete continuous beam bridge, will cause floor deck concrete to crack and shorten its life.

钢-混凝土组合连续梁桥的中间支座附近为负弯矩区，会导致桥面混凝土开裂，缩短使用寿命。

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Currently, our country's research in composite steel-concrete beam bridge is limited in these composite beam bridge which use ordinary materials.

目前，我国对钢—混凝土组合梁桥的研究只局限在采用普通材料的钢—混凝土组合梁桥。

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