【摘要】 探讨预应力混凝土箱梁与钢桁架组合式加劲梁高速铁路斜拉桥的刚度与稳定 ,与无钢桁架PC钢箱梁相比 ,跨径 488m大跨度铁路斜拉桥的活载挠度与跨径之比从 1/4 2 6降低到 1/777,最小整体弹性稳定系数为 11 9。PC钢箱梁与钢桁架组合式加劲梁有效地提高了斜拉桥的刚度和稳定性 ,是大跨度铁路和公铁两用斜拉桥的合理结构形式。更多还原

【Abstract】 The rigidity and stability of a cable stayed bridge with hybrid prestressed concrete box girder stiffened by steel truss were discussed.The maximum deflection to span length of a cable stayed bridge of 488 m span length under high speed railway load is reduced from 1/426 to 1/777,comparing to the bridge with a same PC girder without steel truss.The minimum safety coefficient of elastic stability of the bridge is 11.9.The hybrid girder has large stiffness and good stability.The structure can be used to large span railway cable stayed bridges.更多还原