独塔钢斜拉桥成桥索力及施工索力计算分析

摘要:

以某单塔中央双索面钢斜拉桥为研究背景,采用MIDAS Civil有限元程序进行建模计算,采用恒载平衡法初步拟定成桥索力,根据设置的控制目标,以初拟索力为基础进行多次调整索力以达到预期的成桥状态从而求得合理成桥索力。采用正装迭代法对斜拉索施工阶段进行模拟,经过多次迭代计算,得到施工索力。结果表明,成桥索力较为合理,按照施工索力能够满足斜拉桥合理成桥状态要求。对独塔钢斜拉桥合理成桥索力和施工张拉索力的确定提供借鉴和参考。

Abstract:

Taking a single-pylon central double-cable-plane steel cable-stayed bridge as the research background, the MIDAS Civil finite element program is used for modeling and calculation, and the dead-load balance method is used to preliminarily formulate the cable force of the bridge. Based on the cable force, the cable force is adjusted many times to achieve the expected bridge state, so as to obtain a reasonable bridge cable force. The construction stage of the stay cable is simulated by the formal installation iteration method, and the construction cable force is obtained after several iterations. The results show that the cable force of the completed bridge is relatively reasonable, and the cable-stayed bridge can meet the requirements of the reasonable completed bridge state according to the construction cable force. It provides reference and reference for the determination of reasonable bridge cable force and construction tension cable force of single-pylon steel cable-stayed bridge.