下承式组合体系拱桥合理跨径研究

Study on Reasonable Spans of Through Composite System Arch Bridge

根据吊杆力膜化理论,推导了下承式组合体系拱桥的近似计算公式。基于该公式,估算了组合桥面下承式组合体系拱桥材料用量,并从经济性出发提出了下承式组合结构拱桥的合理跨径范围。其成果对大跨径组合体系拱桥设计具有重要的指导意义。

Based on the suspender force membranization theory, the approximate calculation formula of through composite system arch bridge is deduced. Based on this formula, the article estimates the material amount of through composite system arch bridge under the composite deck, and puts forward the reasonable span range of through composite structural arch bridge from the economy aspect. Its result has the important guiding meaning for the design of long-span composite system arch bridge.