Condition monitoring of truss bridges with relative displacement sensors
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This paper investigates the feasibility and sensitivity of a recently developed relative displacement sensor for the condition monitoring of steel truss bridges. The developed sensor is an innovative new design offering some advantages and unique features, and is a much easier and cheaper method of structural health monitoring due to the simplicity of its direct measurement of relative displacement with no need for a stable reference point. To investigate the potential applications to structural joints condition monitoring, an experimental steel truss bridge model is farbricated and installed with the developed sensors to detect realtive displacement changes in joint connections. The dynamic measurements are analyzed by using a time frequency analysis method, i.e. continuous wavelet transform, which is a well-practiced signal processing technique to identify a change in structural conditions. The sensitivity range of the developed sensor is also investigated to see how sensitive the sensor is to identify the local bolt damage.
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Li, Jun; Hao, Hong (2015)This paper investigates the feasibility and effectiveness of using a recently developed relative displacement sensor for the structural health monitoring of joint conditions in steel truss bridges. The developed relative ...
Development and application of a relative displacement sensor for structural health monitoring of composite bridgesLi, Jun; Hao, Hong; Fan, K.; Brownjohn, J. (2015)This paper proposes a relative displacement sensor developed to measure directly the relative slip between slab and girder in composite bridges for assessing the health condition of shear connections. The structure, design ...
Li, Jun; Hao, Hong; Fan, K. (2013)This paper presents the structure, design principle, features and calibration of a developed relative displacement sensor for structural health monitoring. Relative displacement is measured from four strain gauges stuck ...