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강덕신,이홍민,박효선,이임평,Kang. Deok-Shin,Lee. Hong-Min,Park. Hyo-Seon,Lee. Im-Pyeong 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1
Terrestrial Laser Scanning(TLS) was developed at the mid-to-late 1990s. This technique enables to perform reconnaissance surveying of regions or structures hard to access. Besides, TLS has been extended its application gradually such as preservation of historical remains, underground surveys, slopes, glaciers monitoring and so on. However, though the technique has a lot of advantages, an application for structural health and safety monitoring is a beginning stage and it need much research. Therefore in this study, as a groundwork, the estimation model on stress of structures using TLS and Finite Element Method(FEM) applied by the Digital Elevation Model(DEM) technique of geoinformatics is proposed. For the verification of this model, experiments were performed with a continuous steel beam subjected to point loads and outputs were compared with those of electrical strain sensors.
선형 삼각형 격자 근사법을 활용한 지상 레이저 스캐닝에 의한 구조물의 변형 계측기법
강덕신 ( Kang Deok Shin ),이홍민 ( Lee Hong Min ),박효선 ( Park Hyo Seon ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
Terrestrial laser scanning (TLS) delineates surface of every solid object precisely in three dimensions and is recently applied to various fields of geographic information system (GIS), natural science, civil engineering and so on. In the former research, estimation model on stress of structures using TLS is proposed. The method generated deformed shape of the structure appling grid subdivision and average coordinates of points in each subdivision area. However it was not sufficient for structural health monitoring because of errors originated from 3-D data of TLS. Therefore, in this paper, the linear triangle grid fitting method as an advanced approach is suggested for processing the 3-D data from TLS and deflections measured from TLS system are compared with deflections directly measured from linear variable displacement transducers (LVDT).