桥梁预警系统中的预警指标研究及模型试验  

Research on Precaution Index and Model Experiment in Bridge Precaution System

作　　者：刘钰杰 徐玉晓 刘云龙 

机构地区：[1]青岛市市政工程设计研究院,山东青岛266000

出　　处：《山东交通学院学报》2010年第2期36-41,共6页Journal of Shandong Jiaotong University

摘　　要：根据小波包分析理论,结合桥梁结构损伤的动力特征,提出新的损伤识别指标——小波包能量变异极值指数,利用数值模型方法初步验证了其在桥梁损伤识别的效果,并通过斜拉桥模型动力试验验证了其对于桥梁结构损伤具有良好的灵敏性,为桥梁预警系统中损伤识别指标的选择提供了依据。According to the small wave bundle damage, a new damage identifying index which is put for ward. The numerical value model method theory, with dynamical characteristics of bridge structure the aberrance extremum index of small wave bundle energy is validates the effect of the aberrance extremum index of small wave bundle energy in identifying bridge damage. The dynamical experiment of the cable stayed bridge model proves that the aberrance extremum index of small wave bundle energy is very sensitive to the bridge structure damage. Therefore, the aberrance extremum index of small wave bundle energy offers basis for the selection of damage identifying index in bridge precaution system

关 键 词：桥梁预警系统 损伤预警 小波包能量变异极值指数 斜拉桥模型试验 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]