斜拉桥桥面结构损伤位置识别的指标比较被引量：14

COMPARATIVE STUDY OF DAMAGE LOCATING INDICES FOR CABLE-STAYED BRIDGES

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摘要以香港汲水门大桥为背景,应用高精度三维有限元模型,对斜拉桥桥面结构损伤位置识别的模态曲率指标、模态柔度指标和斜拉索张力指标进行了比较研究。主要比较了(1) 在无噪声情况下,三损伤指标对各种不同损伤情况的识别效果;(2) 三损伤指标对损伤程度的敏感性;(3) 三损伤指标的抗噪声能力。获得以下结论: (1) 曲率和柔度指标在损伤定位上对不同类型的损伤情况显现一定的互补性; (2) 同曲率和柔度指标比较,索张力指标对不同的损伤程度呈现较好的稳定性;(3) 对大多数损伤情况,柔度指标的抗噪性最好,曲率指标最差。 This paper presents a comparative study of using the modal curvature index, the modal flexibility index and the cable tension index for damage localization in the cable-stayed Kap Shui Mun Bridge. Based on a precise and validated three-dimensional finite element model of the bridge, a series of damage cases associated with the deck are introduced in the simulation study. The simulation study is conducted with the following focuses: (i) performance comparison of the three indices in the absence of noise; (ii) sensitivity of three indices to damage extent; (iii) tolerance of the three indices to noise. The analysis results show that, for different damage types, modal curvature index and modal flexibility index are complementary to each other in damage indication. Comparatively, cable tension index is more stable than the other two indices to damage extent. For most damage cases, flexibility index is the best of the three indices in anti-noise and the curvature index is the worst.

作者孙宗光高赞明倪一清丁皓江

机构地区沈阳建筑工程学院香港理工大学浙江大学

出处《工程力学》 EI CSCD 北大核心 2003年第1期27-31,共5页 Engineering Mechanics

基金香港特区RGC项目(Polyu 5052/99E) 建设部科技攻关项目(02-2-1.2)

关键词斜拉桥桥面结构损伤位置识别指标比较模态曲率模态柔度斜拉索张力 Condition monitoring Microcracks

分类号 U448.27 [建筑科学—桥梁与隧道工程]

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