测绘通报 ›› 2022, Vol. 0 ›› Issue (5): 95-100.doi: 10.13474/j.cnki.11-2246.2022.0148

• 学术研究 • 上一篇    下一篇

利用地面三维激光扫描进行桥梁挠度变形分析

赵立都1, 向中富1, 周银1, 马下平2, 张双成3, 司梦元1, 陈茂霖1, 胡川1, 潘建平1   

  1. 1. 重庆交通大学土木工程学院, 重庆 400074;
    2. 西安科技大学测绘科学与技术学院, 陕西 西安 710054;
    3. 长安大学地质工程与测绘学院, 陕西 西安 710054
  • 收稿日期:2021-05-10 发布日期:2022-06-08
  • 作者简介:赵立都(1991-),男,博士生,主要研究方向为点云数据处理、桥梁健康监测。E-mail:compassgps@163.com
  • 基金资助:
    国家自然科学基金(42074041;41904171;41801394);重庆市自然科学基金(cstc2019jcyj-msxmX0370);重庆市教委科学技术研究计划项目(KJQN201900729);重庆交通大学高等教育教学改革研究项目(190380);中铁隧道局集团2021年度科技创新计划(隧研合2021-16);中铁隧道局集团2022年度科技创新计划

Analysis of bridge deflection deformation based on ground three-dimensional laser scanning

ZHAO Lidu1, XIANG Zhongfu1, ZHOU Yin1, MA Xiaping2, ZHANG Shuangcheng3, SI Mengyuan1, CHEN Maolin1, HU Chuan1, PAN Jianping1   

  1. 1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    2. College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China;
    3. College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
  • Received:2021-05-10 Published:2022-06-08

摘要: 针对常规桥梁挠度变形分析方法仅能获取有限数量离散监测点的几何变形,且存在自动化程度低、效率低、局限性大的问题,本文提出了一种基于点云数据的桥梁挠度变形分析方法。首先通过地面三维激光扫描仪获取桥梁变形体上的点云数据,经过精确配准,获取可靠点云数据。然后利用滑动窗口法得到桥梁线形,并通过两期线形叠差分析得到桥梁挠度变化。最后以跨度40 m+65 m+40 m的连续钢构桥实体工程为试验对象,利用本文方法发现该桥梁存在最小值为8 mm、跨中最大值为17.5 mm、平均值为14.9 mm的挠度变形。结果表明,该方法理论严密、计算效率高、简单实用。研究结果对三维激光扫描技术在变形监测领域的深度应用有重要借鉴意义。

关键词: 桥梁健康监测, 挠度, 地面三维激光扫描, 点云, 滑动窗口

Abstract: Traditional methods of bridge deformation monitoring usually depend on deformation data of several independent points, which has the problems of low automation degree, low efficiency and limitations. In this article, an accurate method for bridge deflection is proposed. This method accurately registers the point cloud data of the bridge obtained by the ground 3D laser scanner. On the basis of obtaining reliable point cloud data, the bridge alignment is obtained by using the sliding window method, and the deflection of the bridge are obtained by using the difference analysis of two periods of data. Taking a continuous rigid frame bridge with a span of (40 m+65 m+40 m) as the experimental object, it is found that there are deflection deformations with a minimum value of 8 mm, a maximum value of 17.5 mm and an average value of 14.9 mm. Results prove that the method is simple and practical, with strict theory, high computational efficiency. It has important reference significance for the deep application of 3D laser scanning technology in the field of deformation monitoring.

Key words: bridge health monitoring, deflection, ground three-dimensional laser scanning, point cloud, sliding window

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