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A LiDAR Point Cloud Data-Based Method for Evaluating Strain on a Curved Steel Plate Subjected to Lateral Pressure
Hyeon Cheol Jo1, Hong-Gyoo Sohn1, Yun Mook Lim1
1Department of Civil and Environmental Engineering, Yonsei University, 50, Yonsei-ro, Seodaemoon-gu, Seoul 03722, Korea.
Sensors (Basel, Switzerland)
|February 5, 2020
Summary
This study introduces a novel method for structural health monitoring (SHM) using Light Imaging Detection and Ranging (LiDAR) to assess steel structure behavior. The technique combines 3D laser scanning data with finite element methods (FEM) for precise strain evaluation.
Area of Science:
- Engineering
- Geomatics
- Materials Science
Background:
- Structural health monitoring (SHM) and safety assessment are critical for evaluating structural behavior.
- Traditional methods rely on wired or wireless sensors to measure physical responses like displacement or strain.
- Light Imaging Detection and Ranging (LiDAR) is an emerging wireless technique for remote 3D coordinate acquisition.
Purpose of the Study:
- To demonstrate a strain evaluation method for steel structures using LiDAR.
- To analyze the behavior of structures through remote deformation detection.
- To enable precise strain calculation for SHM and safety assessment.
Main Methods:
- Utilizing a LiDAR system for remote 3D laser scanning and coordinate acquisition.
- Combining distributed 3D point cloud data with Finite Element Methods (FEM).
- Reconstructing 3D point cloud data into a 3D mesh model for strain calculation via FEM.
Main Results:
- Successfully demonstrated a method for evaluating strains in steel structures using LiDAR.
- Enabled calculation of strain at any point on a structure by analyzing initial and deformed shapes.
- Provided a non-contact method for SHM and safety assessment.
Conclusions:
- LiDAR offers a viable, non-contact solution for detailed structural behavior analysis.
- The integration of LiDAR data with FEM provides accurate strain evaluation for SHM.
- This method enhances safety assessment capabilities during construction and throughout a structure's lifecycle.
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