基于振型邓氏相关系数组合指标的桥梁支座脱空检测研究  

RESEARCH ON BRIDGE SUPPORT STRIPPING DETECTION BASED ON THE COMBINATION INDEX OF VIBRATION MODE DUNN CORRELATION COEFFICIENTS

作　　者：钱锋 Qian Feng

机构地区：[1]河北唐津高速公路有限公司,河北唐山063002

出　　处：《建筑技术开发》2024年第5期140-142,共3页Building Technology Development

摘　　要：桥梁支座作为连接梁式桥上下部结构的纽带,发挥着传递力与位移的作用。桥梁支座脱空会给桥梁运营带来安全隐患。研究通过激光多普勒仪,在多种桥梁支座脱空工况下,对室内简支梁板桥进行模态测试,获取了梁板在不同工况下的自振频率和振型信息,引入灰度系统关联度理论,检验了振型邓氏相关系数组合指标在桥梁支座脱空检测中的有效性。结果显示该指标能较好地识别出外侧的支座脱空,为现场桥梁支座脱空检测提供理论支撑,结果以期为类似工程提供参考。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 

分 类 号：TH113.1[机械工程—机械设计及理论]