【摘要】 针对浙江某跨径308 m中承式钢管混凝土拱桥的特点,建立了精细的有限元计算模型并分析其模态特性及其在地震动作用下,桥道系的参与以及桥道系刚度、质量变化对拱桥位移、内力的影响。分析表明:对于大跨度中承式钢管混凝土拱桥的地震响应,桥道系的影响不容忽视,桥道系刚度、质量变化对拱肋的影响不同,拱脚附近截面内力对桥道系刚度的变化最为敏感。更多还原

【Abstract】 A seismic response model of long-span concrete filled steel-tube(CFST) arch bridge is set up.Taking a bridge in zhejiang province of 308 m span CFST arch bridge as an example,the mode of vibration and the seismic response behavior is systematically studied by changing the stiffness and mass of the bridge deck.The results show that the effect of bridge deck must be included in the analysis of seismic response of arch bridge.The effect of mass and stiffness of the bridge deck is different.The forces in the springing of arch rib are relatively sensitive to the stiffness of bridge deck.更多还原