| 基于挠度差值影响线的简支梁桥损伤识别研究 |
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| 引用本文： | 杜永峰,刘云帅,王晓琴.基于挠度差值影响线的简支梁桥损伤识别研究[J].甘肃科学学报,2009,21(4):89-92. |
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| 作者姓名： | 杜永峰 刘云帅 王晓琴 |
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| 作者单位： | 1. 西部土木工程防灾减灾教育部工程研究中心,甘肃,兰州,730050;兰州理工大学,土木工程学院,甘肃,兰州,730050
2. 西北民族大学,土木工程学院,甘肃,兰州,730000 |
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| 基金项目： | 国家自然科学基金，甘肃省建设科技攻关基金 |
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| 摘 要： | 推导了简支梁某一点的挠度随移动荷载位置变化的解析解,在理论上证明了挠度差值影响线对结构损伤识别的可行性.提出用损伤前后一点的挠度差值来识别损伤,为验证该方法的正确性,采用一个单跨简支梁进行有限元模拟.通过有限元计算表明该方法对单损伤简支梁的损伤位置和损伤程度具有准确的识别能力.
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| 关 键 词： | 结构损伤识别 结构健康监测 有限单元法 挠度影响线 简支梁桥 |
Study on Damage Identification of the Beam Bridge Based on the Difference of Deflection Influence Line |
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| DU Yong-feng,LIU Yun-shuai,WANG Xiao-qin.Study on Damage Identification of the Beam Bridge Based on the Difference of Deflection Influence Line[J].Journal of Gansu Sciences,2009,21(4):89-92. |
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| Authors: | DU Yong-feng LIU Yun-shuai WANG Xiao-qin |
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| Affiliation: | DU Yong-feng1,2,LIU Yun-shuai1,WANG Xiao-qin3(1.Northwest Center for Disaster Mitigation in Civil Engineering,Ministry of Education,Lanzhou 730050,China,2.School of Civil Engineering,Lanzhou University of Science and Technology,3.School of Civil Engineering,Northwest University for Nationalities,Lanzhou,730000,China) |
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| Abstract: | The analytical solution of one point's deflection changed with moving load location is derived at first.It verifies the feasibility of deflection difference influence line on the damage identification of structures.A method by using deflection difference before and after damage is used to identify structure damage.A simply-supported beam example is adopted to verify the proposed method.It is shown that the method is effective in identifying damage locations and degrees. |
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| Keywords: | structure damage identification structure health monitoring finite element method deflection influence line simply-supported beam bridge |
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