【摘要】 以天津大跨度钢拱桥———直沽桥为研究对象,对其在天津波、三维一致激励及行波效应下拱肋内力和位移的变化规律进行了分析,从该桥横撑刚度的变化对全桥地震响应的影响方面进行了论述,得到了大跨度钢拱桥拱顶对内力的影响程度要小于拱脚、横撑刚度较小的钢拱桥在地震作用下的内力较大、横撑刚度对横向弯矩有较大的影响等结论。更多还原

【Abstract】 Taking long-span steel arch bridge Zhigu Bridge in Tianjin as the research,the change law of internal forces and displacements under Tianjin wave,the law of three-dimensional consistent stimulate and the traveling wave were analyzed.Meanwhile the effect of change of strut rail stiffness on seismic response of full-bridge was discussed.The results showed that vaults of long-span steel arch bridges had much less sensitive degree to the internal forces than arch foot’s,while bridges with smaller strut rail stiffness had more internal forces,and strut rail showed significant influence on transverse moment.更多还原