| 采用应变能方法定量分析输电塔损伤程度 |
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| 引用本文： | 郭惠勇,薛晓武,李正良,朱汉棠.采用应变能方法定量分析输电塔损伤程度[J].重庆大学学报(自然科学版),2012,35(12):94-99. |
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| 作者姓名： | 郭惠勇 薛晓武 李正良 朱汉棠 |
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| 作者单位： | 重庆大学 土木工程学院；山地城镇建设与新技术教育部重点实验室，重庆 400045;重庆大学 土木工程学院；山地城镇建设与新技术教育部重点实验室，重庆 400045;重庆大学 土木工程学院；山地城镇建设与新技术教育部重点实验室，重庆 400045;重庆大学 土木工程学院；山地城镇建设与新技术教育部重点实验室，重庆 400045 |
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| 基金项目： | 重庆市科委自然科学基金计划资助项目（CSTC2010BB4208） |
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| 摘 要： | 为了解决输电塔结构的损伤识别问题，提出了基于模态应变能变化率和能量方程的两步识别方法。首先利用模态应变能变化率方法进行较为精确的损伤定位，然后引入损伤后的单元刚度矩阵，对结构模态应变能耗散率理论进行了相关的改进研究，从而推导出更精确的损伤定量方程方法。该方法只需要前几阶振型模态，不需要完备的测量信息。数值仿真的结果表明，该两步识别方法可以有效地识别出输电塔结构的损伤位置和程度。
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| 关 键 词： | 损伤检测 应变能 变化率 耗散率 输电塔 |
Quantitative analysis of damage extent of transmission tower by using strain energy method |
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| GUO Huiyong,XUE Xiaowu,LI Zhengliang and ZHU Hantang.Quantitative analysis of damage extent of transmission tower by using strain energy method[J].Journal of Chongqing University(Natural Science Edition),2012,35(12):94-99. |
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| Authors: | GUO Huiyong XUE Xiaowu LI Zhengliang and ZHU Hantang |
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| Institution: | College of Civil Engineering; Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education Chongqing University, Chongqing 400045, China;College of Civil Engineering; Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education Chongqing University, Chongqing 400045, China;College of Civil Engineering; Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education Chongqing University, Chongqing 400045, China;College of Civil Engineering; Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education Chongqing University, Chongqing 400045, China |
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| Abstract: | In order to solve the structural damage identification problem of transmission tower, a two-step identification method based on change rate and dissipation rate of modal strain energy is proposed. The damage location is identified by the change rate of modal strain energy method. Then, the modal strain energy dissipation rate theory is analyzed further by using the element stiffness matrix after injury. As a result, a more accurate damage quantification equation method is introduced. This method requires only several modals of vibration. The numerical simulation results show that this two-step method can find the damage location and damage degree of transmission towers effectively. |
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| Keywords: | damage detection strain energy change rates dissipation rates transmission tower |
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