基于多阶段分区域动力测试的桥梁结构损伤评估

doi:10.13229/j.cnki.jdxbgxb20180562

摘要/Abstract

摘要：

针对桥梁结构损伤评估时存在的传感器布置数目过多和测点最优化等问题，基于连续体位移协调条件和状态随机空间理论，通过引入子区域的概念，提出了多阶段分区域移动测试法，从而得到桥梁整体结构模态振型。建立了以模态柔度系数对角元素为损伤指标的诊断方法。分析结果表明：提出的多阶段分区域移动测试法，能以较少的设备条件获得完整的结构动态响应数据，方便快捷地实现桥梁的振动测试，并从仅有的输出移动测试数据中得到结构的模态柔度对角元素。算例表明：模态柔度系数能较好地反映结构损伤区域和程度。

关键词: 桥梁工程, 多阶段分区域, 模态柔度, 损伤诊断, 损伤评估

Abstract:

To solve the problem of excessive number of sensors and to optimize the measuring points in damage assessment of bridge structures, a method of multi?stage subregion mobile test was presented based on the displacement coordination condition of continuum and state stochastic space theory. This method can be used to identify the mode shape of overall structure by sub?region.The diagnosis method based on modal flexibility coefficient for angle element as damage index is proposed. The analysis results show that the new approach can exactly and efficiently obtain complete structural dynamic response data with less equipment conditions, and gain more precise outcome.

Key words: bridge engineering, multi?stage subregion, modal flexibility, damage diagnosis, damage assessment

中图分类号:

U414

李万恒,申林,王少鹏,赵尚传. 基于多阶段分区域动力测试的桥梁结构损伤评估[J]. 吉林大学学报(工学版), 2019, 49(3): 773-780.

Wan⁃heng LI,Lin SHEN,Shao⁃peng WANG,Shang⁃chuan ZHAO. Damage assessment of bridge construction based onmulti⁃stage subregion mobile test[J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(3): 773-780.

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