基于全息扫描的大型复杂钢结构变形监测与受力评估新技术

以重庆来福士高空连廊结构为项目依托,阐述了大型复杂钢结构变形监测的新方法和具体技术路线。针对变形监测中点云数据难以拼接的问题,通过空间特征点实现坐标系配准;针对变形监测点选取困难、数量多、工作量大的问题,提出一种基于算法提取结构的挠度变形曲线的方法,实现无监测点的变形监测;同时将有限元仿真模拟与三维激光扫描技术的变形监测相融合,根据三维扫描变形监测结果反向修正有限元计算,通过应力变化评估结构受力状态。结果表明:该方法有效解决了变形监测中的难题,保证了工作的效率和有限元计算的准确性,对于结构的健康监测具有重要意义。

New technology for deformation monitoring and stress assessment of large complex steel structures based on holographic scanning

Based on the structure of Chongqing Raffles High-altitude Corridor, this paper expounds the new methods and specific technical routes for large-scale complex steel structure deformation monitoring. Aiming at the problem that the point cloud data is difficult to be spliced in deformation monitoring, coordinate system registration is realized by spatial feature points. For the problem that the deformation monitoring points are difficult to select, the quantity is large, and the workload is large, a deflection curve based on the algorithm is proposed. The method realizes deformation monitoring without monitoring points. At the same time, the finite element simulation is combined with the deformation monitoring of 3D laser scanning technology to evaluate the structural safety state through stress change, which has important guiding significance for structural health monitoring.