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洛阳瀛洲大桥主跨为中承式系杆拱桥,其拱肋采用空间倒三角截面形式的钢管混凝土桁架。在施工过程中,对结构应力、位移、系杆索力进行监控,通过计算分析与实测数据以及模型试验的对比分析,修正计算模型,确保结构在各工况下的受力和变形处于合理状态。通过分析工序变更对结构的影响,优化了工序。同时采用影响矩阵法,得出了吊杆的张拉顺序以及相应的张拉控制力,较好地实现了对吊杆索力控制的目标。
The main span of Luoyang Yingzhou Bridge is a middle-span tie-rod arch bridge, and the arch rib adopts the concrete-filled steel tube truss with the inverted triangular section in space. In the process of construction, the structure stress, displacement and tie-rod tension are monitored. By comparing the calculated and analyzed data with the model test, the calculation model is revised to ensure that the stress and deformation of the structure under all conditions are in a reasonable state . By analyzing the impact of process changes on the structure, the process is optimized. At the same time, using the influence matrix method, the tension sequence of the boom and the corresponding tension control force are obtained, and the target of the boom force control is achieved well.