基于三维扫描的钢筋混凝土梁受力状态反演方法

以实验室简支梁静力加载实验为数据来源,针对现有健康监测中传感设备的费用高、寿命短、数据接收困难等问题,提出了一种基于三维激光扫描技术的无损非接触检测方法,并结合有限元仿真技术,采用有限元正分析的位移反分析理论反演结构现状下弹性模量、受力状况以及重点监测部位应变,弥补了传统健康监测需表贴应变片、埋设传感器等带来的局限性,且有效降低了成本,为桥梁结构的健康监测与诊断评估提供了一种新方法、新思路.

Research on inversion method of stress state of RC beam based on 3D scanning

The health of bridge structure is related to the national economy and the survival of the people, as well as the sustainable development of social economy. It is of great theoretical significance and practical value to carry out the research on health diagnosis and evaluation of bridges. Based on the static loading experiment of the simple supported beam in the laboratory as the data source, aiming at the problems of high cost, short life and difficult data receiving of the existing sensing equipment in the health monitoring, a non-destructive non-contact detection method based on the three-dimensional laser scanning technology is proposed. Combined with the finite element simulation technology, the displacement back analysis theory of the finite element forward analysis is used to invert the elastic modulus of the current structure Stress condition and strain of key monitoring parts.It makes up for the limitations of traditional health monitoring, such as attaching strain gauges and embedding sensors, and effectively reduces the cost. It provides a new method and new idea for health monitoring and diagnosis evaluation of bridge structures.