既有桥梁结构劣化状态评估  

Evaluation on Structure Degradation State for Existing Bridges

作　　者：卢海林 余勇 郝静 朱志刚 LU Hai-lin;YU Yong;HAO Jing;ZHU Zhi-Gang(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074,China;China Construction Third Bureau First Engineering Co.,Ltd.,Wuhan 430040,China)

机构地区：[1]武汉工程大学土木工程与建筑学院,武汉430074 [2]中建三局第一建设工程有限责任公司,武汉430040

出　　处：《科学技术与工程》2023年第26期11385-11390,共6页Science Technology and Engineering

基　　金：武汉市城乡建设委员会科技计划(201831);桥梁结构健康与安全国家重点实验开放课题(2017-04-GF)。

摘　　要：为提高既有桥梁结构劣化状态评估结果的准确性,基于既有桥梁的监测、检测数据以及有限元手段,提出了既有桥梁劣化状态的评估方法。首先,基于既有桥梁监测数据,采用精确的效应分离法实现恒载效应增量的分离,然后利用有限元手段建立该桥的劣化响应回归模型,最后将恒载效应增量代入回归模型中实现既有桥梁劣化的评估,并通过桥梁定期检测结果验证了评估结果的合理性。结果表明:该既有桥梁仅出现轻微劣化,且所建议的既有桥梁劣化状态评估方法是合理的,可为既有桥梁结构承载能力评估奠定基础。In order to improve the evaluation accuracy of degradation state for existing bridges,an evaluation method based on the monitoring and detection data of existing bridge and the finite element method was proposed.Firstly,the accurate effect separation method was used to separate the increment of the dead load effect based on the monitoring data of the existing bridge.Then,the regression model of the deterioration response was established by the finite element method.Finally,the increment of the dead load effect was replaced into the regression model to evaluate the deterioration state of the existing bridge.The results show that the existing bridge is only slightly deteriorated,and the proposed evaluation method of the deterioration state for existing bridge is reasonable,which can lay a foundation for the bearing capacity evaluation for existing bridge structure.

关 键 词：既有桥梁 劣化状态 恒载效应增量 回归模型 监测数据 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]