Bridge bearings,as the link connecting the upper and lower structures of beam bridges,play a role in transmitting force and displacement.The detachment of bridge bearings can bring safety hazards to bridge operation.The study conducted modal tests on indoor simply supported beam slab bridges under various bridge support void conditions using a laser Doppler instrument.The natural frequency and mode information of the beam slab under different working conditions were obtained,and the grey system correlation theory was introduced to test the effectiveness of the combination index of mode Dun's correlation coefficient in bridge support void detection.The results show that this indicator can effectively identify the outer bearing void,providing theoretical support for on-site bridge bearing void detection,and the results are expected to provide reference for similar projects.
关键词
桥梁支座/脱空定位/激光多普勒测振/灰度系统关联度
Key words
bridge support/void positioning/laser doppler vibration measurement/relational degree of gray system
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