| 基于模态参数敏感性分析的多层建筑损伤定位 |
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| 引用本文： | 朱宏平,周建峰.基于模态参数敏感性分析的多层建筑损伤定位[J].振动．测试与诊断,2005,25(4):256-259. |
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| 作者姓名： | 朱宏平 周建峰 |
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| 作者单位： | 华中科技大学土木工程与力学学院,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目(编号:50378041)，教育部博士点基金资助项目(编号:20030487016) |
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| 摘 要： | 将多高层房屋结构简化为周期剪切模型,运用周期结构原理和波导纳方法推导出当结构发生损伤时结构振型及其振型斜率和振型曲率的具体表达式,进而得到了周期结构模态参数的敏感性。分析表明这些振动参数的敏感性与结构参数无关,即不需要知道原始结构的物理参数就能确定敏感性系数,并以20层建筑结构为例说明了仅用一阶振型斜率和振型曲率就可以精确地进行损伤定位。
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| 关 键 词： | 建筑结构 损伤定位 模态参数 敏感性 |
| 收稿时间： | 2004-04-12 |
| 修稿时间： | 2005-08-26 |
Multi-Story Building Damage Localization Based on Sensitivity Analysis of Modal Parameters |
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| Zhu Hongping,Zhou Jianfeng.Multi-Story Building Damage Localization Based on Sensitivity Analysis of Modal Parameters[J].Journal of Vibration,Measurement & Diagnosis,2005,25(4):256-259. |
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| Authors: | Zhu Hongping Zhou Jianfeng |
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| Abstract: | Multi-story and highrise buildings are simplified as periodic spring-mass systems and the general expressions of mode shapes and their derivatives are derived in this paper.Moreover,the sensitivities of these mode parameters are obtained,which do not depend on the structural parameters and do not need any prior information of the original structures.The numerical results of 20-element periodic spring-mass system demonstrate that single or multiple damages,either slight or severe,can be accurately localized by using only one slope or curvature of mode shape in the lower modes. |
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| Keywords: | buildings damage localization modal parameters sensitivity |
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