祁家渡钢管混凝土拱桥设计

DESIGN OF QIJIADU YELLOW RIVER BRIDGE

介绍了甘肃境内祁家渡黄河大桥上承式钢管混凝土拱桥的设计特点,该桥为一座主跨180m,宽跨比1/25.7的上承式钢管混凝土拱桥,给出了施工过程全三维仿真分析及运营阶段的主要结果。如何保证在施工过程的稳定性是桥梁设计和施工的核心问题,运营中桥梁各项指标均满足规范要求。

The design characteristics of the deck type CFST arch-bridge in Gansu Province was introduced,its main span is 180 meters, width-span ratio is 1/25.7. Using three-dimensional finite element models of the bridge, it was analysed the transverse stability of bridge during the process of construction and the final condition of the bridge, respectively. The stability of bridge under construction is the main problem of the design and construction. The indexes of the bridge during its operation meet the requirements of the highway specifications.