| 基于柔度矩阵法的钢栈桥损伤识别 |
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| 引用本文： | 杨开荣,周晶,冯新.基于柔度矩阵法的钢栈桥损伤识别[J].地震学刊,2011(6):642-647. |
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| 作者姓名： | 杨开荣 周晶 冯新 |
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| 作者单位： | 大连理工大学工程抗震研究所,辽宁大连116024 |
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| 摘 要： | 根据以往模态柔度损伤指标的研究成果,建立了模态柔度差曲率和模态柔度曲率差这2种结构损伤识别指标。通过对一个百米钢栈桥最容易发生损伤的下弦梁进行各种损伤工况下的数值模拟研究,比较分析了这2种结构损伤指标的损伤识别效果。并且在钢栈桥2根下弦梁都有损伤的情况下,对两者之间损伤识别效果的相互影响进行了研究。研究结果表明,本文提出的2种损伤识别指标,对空间复杂钢栈桥的易损下弦梁都有很好的损伤识别效果,2根下弦梁的损伤识别具有较好的独立性。
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| 关 键 词： | 钢栈桥 健康监测 损伤识别 模态分析 模态柔度 |
Damage Identification of Steel Trestle Based on Modal Flexibility Matrix |
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| YANG Kai-rong,ZHOU Jing,FENG Xin.Damage Identification of Steel Trestle Based on Modal Flexibility Matrix[J].Journal of Seismology,2011(6):642-647. |
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| Authors: | YANG Kai-rong ZHOU Jing FENG Xin |
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| Institution: | (Institute of Earthquake Engineering,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | According to the previous research achievement of modal flexibility damage indicators,two indicators, the Modal Flexibility Difference Curvature and the Modal Flexibility Curvature Difference,are constructed.The damage identification effect of the two indicators are compared by a numerical simulation of a 100 meter-long steel trestle when various damage cases are settled in different positions of the bottom chord beams of the steel trestle.In addition,the influence of damage identification effect on either bottom chord beam when the other one is also damaged,is taken into consideration in this paper.Results indicate that the two indicators are sensitive to the damage to both bottom chord beams which are the damageprone parts of the trestle,and the damage identification of either bottom chord beam is unrelated to the damage cases of the other one. |
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| Keywords: | steel trestle health monitoring damage identification modal analysis modal flexibility |
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