基于地面三维激光扫描的桥梁挠度变形测量

摘要

This paper examines bridge deflection measurement.Against the characteristics of the point cloud at the bottom surface of the bridge,two methods:fitting calculation and center of gravity calculation,are used to obtain the deflection change of the bridge under different loadings.The results are compared and analyzed and the preliminary measuring precision of this technology is confirmed.Theexperiment also verifies the feasibility of this technology in bridge deflection measurement.%将地面三维激光扫描技术应用到桥梁挠度变形测量.针对桥底面点云的具体特点,采用点云拟合计算方法和重心计算方法,分别获取不同荷载情况下的桥底挠度变化,并进行对比分析,初步确定其变形测量精度,验证了该技术在桥梁挠度变形测量中的可行性.