下承式钢筋混凝土系杆拱桥的设计难点分析

Design difficulties analysis of the concrete-filled steel reinforced concrete bowstring arch bridge

钢筋混凝土系杆拱桥由于造型美观、结构合理等因素而广泛应用于跨越河道、山谷和城市桥梁中,但其设计过程也存在着许多需要引起足够重视的技术难点,如果考虑不周将给桥梁带来永久性损伤,甚至威胁到桥梁安全。结合京航运河80 m下承式系杆拱桥的设计过程,分析了此类桥梁设计中的计算难点。

Due to many factors such as its pleasing aesthetics, reasonable structure, reinforced concrete tied -arch bridge is widely used in acrossing the river, the valley and the city, but its design process also has many technology difficulty needing to pay more attention, if the consideration is not sufficiency, which will bring permanent damage to the bridge, even threatening the safety of the bridge. Combining with the design process of a 80m main span through tied -arch bridge on the Jing- Hang Canal, analyzes the calculation difficulty in the design of the type of the bridges, which can be referenced by similar Bridges design.