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双线桥墩如按单线实体桥墩加宽一个线间距作成实体,则圬工数量较大,且不能充分发挥材料的能力,如将中心部分挖去,常可获得较经济的效果,故常被采用。这样的桥墩由于基础刚度较大,形式为固结于基础的两立柱与一帽梁组成的门式刚架。刚架承受刚架平面内的外力时,其应力分析可用任一种静不定结构解法求之;承受垂直于刚架平面的外力时,若外力对于刚架的对
If a double-line piers is widened by a single line spacing to make a solid line, the number of workers is large and the material’s capacity can not be fully exerted. For example, if the central part is dredged, economic effects can often be obtained and it is often adopted. Such a bridge pier due to the greater rigidity of the foundation, the form of fixed two columns and a cap girder composed of portal frame. When the rigid frame is subjected to the external force in the plane of the rigid frame, the stress analysis can be obtained by any static structure solution method. When the external force is perpendicular to the plane of the rigid frame,