摘要
挠度是评估桥梁安全性能的重要参数,对桥梁挠度的精确测量是桥梁健康监测领域的研究热点。提出一种基于桥梁转角进行响应重构的挠度测试方法,可利用桥跨合适测点位置处转角数据准确重构邻近梁段截面的挠度响应。根据桥梁几何参数和荷载位置信息建立挠度响应与转角响应之间关联,结合实测转角响应识别中间变量,以此计算桥梁挠度响应信息,实现由转角测点数据重构桥梁挠度响应。开展数值仿真和模型试验,研究表明基于转角数据重构的挠度响应与实际挠度响应高度一致;另一方面该方法结合荷载信息和桥梁几何参数,基于单个转角响应即可重构挠度响应,具有较好的实用性。
Deflection is an important parameter to evaluate the safety performance of bridge.Measuring deflection accurately is a research hotspot in the field of bridge health monitoring.This paper presented a method to restructure the deflection response based on the rotation data,which can restructure the deflection response accurately at the adjacent beam section with the rotation data of the appropriate measuring point.According to the bridge geometric parameters and load location information,the relationship between deflection response and rotation response was established.Combined with the measured rotation response data,the intermediate variables were identified,and then the bridge deflection response information was calculated to restructure the bridge deflection response curve with the data of the rotation measurement point.Numerical simulation and model test were carried out.The results show that the restructuring method of bridge deflection response is highly consistent with the actual deflection response;On the other hand,the method can reconstruct the deflection response based on a single rotation response by combining load information and bridge geometric parameters,which has good practicability.
作者
王宁波
赵雨森
贺政
黄天立
WANG Ningbo;ZHAO Yusen;HE Zheng;HUANG Tianli(School of Civil Engineering,Central South University,Changsha 410075,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第10期284-291,共8页
Journal of Vibration and Shock
基金
湖南省自然科学基金(2021JJ30840)。
关键词
桥梁挠度
桥梁转角
响应重构
模型试验
bridge deflection
bridge rotation
response restructuring
model test
