【摘要】 以桥梁结构稳定理论为基础,以某高速公路高墩大跨连续刚构桥为例,利用有限元软件MIDAS分析了大跨高墩桥墩横隔板设置、施工荷载等因素对施工阶段稳定的敏感性。分析表明,桥墩横隔板间距大小对高墩大跨桥梁施工稳定不是很敏感,而施工荷载对其比较敏感,故悬臂施工时应特别注意施工荷载的平衡。其结论可为桥梁设计和施工提供一定的参考依据。更多还原

【Abstract】 Based on stability theory of bridge,taking the long span continuous rigid frame bridge of an expressway for example stability’ sensitivity of setting of diaphragm,site load etc in the process of construction was analyzed by MIDAS.Analysis shows that the stability of large span bridge with high piers in the process of construction was not very sensitive to the size of the bridge piers’ diaphragm spacing,but is sensitive to site load,so special attention should be paid to load balance in the process of cantilever construction.This conclusion can provide some references to design and construction of bridges.更多还原