Estimation of Dynamic Displacements from Strain Signal using Mode Shapesof Simply Supported Beam

단순보 모드형상을 이용하여 변형률 신호에서 동적변위 응답 추정

An algorithm is proposed for computing dynamic displacements of a bridge using FBG sensors. An existing algorithm for estimating dynamic displacements of a simply supported beam through mode superposition is extended and applied to various types of bridges with bending and torsional modes. The proposed algorithm is examined through field tests on a suspension span steel deck plate box girder bridge. Guidelines are provided for determining the number of modes and the number of strain gages to be used.