Education
B.S. in Civil Engineering, February 2016, UNIST, Ulsan, Korea
Ph.D. in Civil Engineering, August 2020, UNIST, Ulsan, Korea
Dissertation: Long-term displacement measurement of full-scale bridges using computer vision and LiDAR
Ph.D. in Civil Engineering, August 2020, UNIST, Ulsan, Korea
Dissertation: Long-term displacement measurement of full-scale bridges using computer vision and LiDAR
Research Experience
Mar. 2022 - Current Postdoctoral researcher, Sunkyunkwan University, Korea
Sep. 2020 - Feb. 2022 Postdoctoral researcher, UNIST, Korea
Sep. 2020 - Feb. 2022 Postdoctoral researcher, UNIST, Korea
Honors
UNI-STAR Scholarship, March 2011 - February 2017, Funded by UNIST (Scholarship for top score)
Global Ph.D. Fellowship, March 2017 - August 2020, Funded by NRF of Korea (30,000,000 won/year)
Global Ph.D. Fellowship, March 2017 - August 2020, Funded by NRF of Korea (30,000,000 won/year)
Featured Works
GPR-based identification of subsurface ponding zones in waterproofing layer
Subsurface ponding zones (SPZ) in bridge deck are vulnerable to carbonation, chloride ingress, and freeze-thaw cycle accelerating structural deterioration. A bathymetric dendrogram-based method is proposed using ground penetrating radar (GPR).
*GPR is a nondestructive testing (NDT) technique utilizing electromagnetic wave for subusrface survey.
GPR-based identification of subsurface ponding zones in waterproofing layer
Subsurface ponding zones (SPZ) in bridge deck are vulnerable to carbonation, chloride ingress, and freeze-thaw cycle accelerating structural deterioration. A bathymetric dendrogram-based method is proposed using ground penetrating radar (GPR).
*GPR is a nondestructive testing (NDT) technique utilizing electromagnetic wave for subusrface survey.
Subsurface ponding zones (SPZ) in bridge deck are vulnerable to carbonation, chloride ingress, and freeze-thaw cycle accelerating structural deterioration. A bathymetric dendrogram-based method is proposed using ground penetrating radar (GPR).
*GPR is a nondestructive testing (NDT) technique utilizing electromagnetic wave for subusrface survey.
DIC-based static stress estimation
Field application of conventional hole drilling method is challenging due to the camera motion during drilling a hole. Practical stress estimation method is developed by extracting stress-related displacement field component from DIC measurement.
* Digital image correlation (DIC) is a technique for measuring 2D displacement field by using images before and after the loading,
* Hole drilling method is a semi-destructive testing technique for measuring stresses in a material by drilling a hole.
Field application of conventional hole drilling method is challenging due to the camera motion during drilling a hole. Practical stress estimation method is developed by extracting stress-related displacement field component from DIC measurement.
* Digital image correlation (DIC) is a technique for measuring 2D displacement field by using images before and after the loading,
* Hole drilling method is a semi-destructive testing technique for measuring stresses in a material by drilling a hole.
Long-term displacement measurement using computer vision and LiDAR
Bridges experience long-term displacement due to creep, shrinkage, dead load from superstructures, or structural deterioration that needs to be monitored for construction quality assessment and regular maintanance. Conventional displacement measurement exhibits drift error during long-term monitoring; therefore, two different long-term displacement measurement methods are developed using computer vision and LiDAR that are cross-validated through a full-scale bridge under construction.
* The dual-camera system consists of main camera for displacement measurement and sub-camera for error compensation.
* Light Detection and Ranging (LiDAR) is a method that can measure 3D point cloud of a body.
Bridges experience long-term displacement due to creep, shrinkage, dead load from superstructures, or structural deterioration that needs to be monitored for construction quality assessment and regular maintanance. Conventional displacement measurement exhibits drift error during long-term monitoring; therefore, two different long-term displacement measurement methods are developed using computer vision and LiDAR that are cross-validated through a full-scale bridge under construction.
* The dual-camera system consists of main camera for displacement measurement and sub-camera for error compensation.
* Light Detection and Ranging (LiDAR) is a method that can measure 3D point cloud of a body.
