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本文根据三座已建大跨度PC连续刚构桥的工程实际情况,建立有限元模型。通过实际桥梁健康监测数据与模型数据进行对比,验证模型的正确性。并基于此模型提出一种二次张拉设置方式。依据分析结果图1、表1、表2,选择合适的二次张拉位置、数量及时间可以有效改善大跨PC连续刚构桥跨中下挠病害,具有重要工程价值。
In this paper, based on the actual situation of three long-span PC continuous rigid frame bridges, the finite element model is established. Through the actual bridge health monitoring data and model data comparison, verify the correctness of the model. Based on this model, a secondary tension setting method is proposed. According to the analysis results in Figure 1, Table 1, Table 2, select the appropriate location of the secondary tension, the number and time can effectively improve the long-span PC rigid frame spanning bridge mid-span deflection disease, has important engineering value.