基于线刚度识别的铁路桥梁下部结构服役性能动力评估方法
发布时间：2018-07-28 14:33
【摘要】：以下部结构实测整体或局部振动模态参数为目标值,采用模型修正技术和优化计算方法识别墩身刚度和基础约束刚度参数,进而计算桥墩横桥向和顺桥向水平线刚度。分析线刚度对桥墩各类病害的灵敏度,建立线刚度指数的概念,在此基础上提出下部结构服役性能评估准则和评估流程。对某高速铁路桥墩进行现场试验,并依据设计规范和本文所提出的评估准则对其工作状态进行评估。桥墩评估状态与现场勘查结果相符,从而证明本文所提评估方法的准确性和可靠性。
[Abstract]:The whole or local vibration modal parameters of the following structures are measured as target values. The stiffness parameters of pier body and foundation constraint are identified by model modification technique and optimization calculation method, and then the horizontal stiffness of bridge piers in transverse direction and horizontal direction of forward bridge is calculated. The sensitivity of line stiffness to various defects of pier is analyzed and the concept of linear stiffness index is established. On this basis, the evaluation criteria and flow chart of service performance of substructure are proposed. Field test was carried out on the pier of a high speed railway, and its working condition was evaluated according to the design code and the evaluation criterion proposed in this paper. The evaluation state of bridge pier is consistent with the result of site survey, which proves the accuracy and reliability of the evaluation method proposed in this paper.
【作者单位】： 北京交通大学土木建筑工程学院;中国铁路总公司科技管理部;
【基金】：国家自然科学基金(51678032) 国家重点基础研究发展计划(973计划)(2013CB036203) 中国铁路总公司科技研究开发计划(2015G006-M)
【分类号】：U446
本文编号：2150542
[Abstract]:The whole or local vibration modal parameters of the following structures are measured as target values. The stiffness parameters of pier body and foundation constraint are identified by model modification technique and optimization calculation method, and then the horizontal stiffness of bridge piers in transverse direction and horizontal direction of forward bridge is calculated. The sensitivity of line stiffness to various defects of pier is analyzed and the concept of linear stiffness index is established. On this basis, the evaluation criteria and flow chart of service performance of substructure are proposed. Field test was carried out on the pier of a high speed railway, and its working condition was evaluated according to the design code and the evaluation criterion proposed in this paper. The evaluation state of bridge pier is consistent with the result of site survey, which proves the accuracy and reliability of the evaluation method proposed in this paper.
【作者单位】： 北京交通大学土木建筑工程学院;中国铁路总公司科技管理部;
【基金】：国家自然科学基金(51678032) 国家重点基础研究发展计划(973计划)(2013CB036203) 中国铁路总公司科技研究开发计划(2015G006-M)
【分类号】：U446
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