TLS 변위계측모델을 이용한 장스팬 철골 박스형 거더의 변위 계측

Displacement Measurement of an Existing Long Span Steel Box-Girder using TLS(Terrestrial Laser Scanning) Displacement measurement Model

It was previously introduced a new displacement measuring technique using terrestrial laser scanning (TLS) that remotely samples the surface of an object using laser pulses and generates the three-dimensional (3D) coordinates of numerous points on the surface. In this paper, for an assessment of the capabilities of the measuring technique about existing structures, the field tests for vertical displacement measurement of an existing long span steel box-girder are experimentally carried out. The performance of the technique is evaluated by comparing the displacements obtained from TLS system and displacements directly measured from linear variable displacement transducer (LVDT).