斜拉桥施工维修加固全过程控制分析

发布时间：2018-10-08 16:31

【摘要】：以某PC斜拉桥维修工程为背景,用GQJS软件研究对斜拉桥施工维修加固全过程模拟计算分析问题。根据全桥拉索索力、桥面线形、塔位、主梁混凝土应力和支座脱空等结构参数模拟维修前结构的实际状态,根据桥梁结构的病害状况对结构参数进行修正,模拟分析维修加固过程截面削弱和恢复、黏贴钢板、张拉体外预应力补强钢筋以及索力调整等施工工况。给出了维修后的结构在运营阶段中的计算分析结果。监测结果表明,维修加固后,主梁线形调整最终达到了预期目标,拉索索力更趋于均匀,维修过程中主梁混凝土应力、塔位以及摆索拉力的变化均在控制范围内,这说明了维修加固的施工控制达到了预期目标,同时保证了结构的安全。
[Abstract]:Based on the maintenance engineering of a PC cable-stayed bridge, the simulation calculation and analysis of the whole process of the cable-stayed bridge maintenance and reinforcement are studied by using GQJS software. According to the structural parameters such as cable force, bridge deck alignment, tower position, main beam concrete stress and support clearance, the actual state of the structure before maintenance is simulated, and the structural parameters are modified according to the damage condition of the bridge structure. The construction conditions such as section weakening and restoring, sticking steel plate, tensioning external prestressing reinforcement bar and cable force adjustment during maintenance and reinforcement are simulated and analyzed. The results of calculation and analysis of the structure after maintenance in operation stage are given. The monitoring results show that, after maintenance and reinforcement, the alignment adjustment of the main beam finally reaches the expected goal, the cable force tends to be more uniform, and the changes of the concrete stress, tower position and the tension force of the pendulum cable during the maintenance are all within the control range. This shows that the construction control of maintenance and reinforcement has reached the expected goal, and the safety of the structure is ensured at the same time.
【作者单位】：中国路桥工程有限责任公司;交通运输部公路科学研究院;
【分类号】：U448.27;U445.72

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