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对某大跨度复杂钢网架结构进行施工过程跟踪监测,包括钢构件吊装过程中的敏感及重要构件的应力变化监测,临时支承点拆除时结构支承点的变形监测及大型焊接球整体提升焊接时焊接环的变形监测。监测结果表明:应力及变形均在合理范围之内,并最终稳定于某一值,监测效果良好。对结构在施工中各种工况下的应力及变形进行了有限元仿真分析,将实测应力值和变形值与有限元分析结果进行比较,基本吻合,表明有限元分析较好地模拟了施工过程中的应力及变形变化。
The monitoring and monitoring of the construction process of a large-span complex steel grid structure, including the monitoring of the stress and the change of stress during the hoisting of steel members and the deformation of the important components, the deformation monitoring of the structural support points during the removal of the temporary support points and the overall welding of the large- Welding ring deformation monitoring. Monitoring results show that: the stress and deformation are within a reasonable range, and eventually stabilized at a certain value, the monitoring effect is good. The finite element simulation analysis of the stress and deformation of the structure under various working conditions was carried out. The measured stress values and deformation values were compared with those of the finite element analysis. The result shows that the finite element analysis simulates the construction process well In the stress and deformation changes.