| 基于位移模态四阶导数的梁结构损伤识别 |
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| 引用本文： | 韩西,向丽,钟厉. 基于位移模态四阶导数的梁结构损伤识别[J]. 中南公路工程, 2012, 0(4): 47-49,113 |
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| 作者姓名： | 韩西 向丽 钟厉 |
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| 作者单位： | [1]重庆交通大学土木建筑学院,重庆400074 [2]重庆交通大学机电与汽车工程学院,重庆400074 |
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| 基金项目： | 重庆市交通委员会科技项目（701487）. |
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| 摘 要： | 结构损伤识别一直是工程界关注的热点问题，针对混凝土梁结构的动力损伤识别，提出了利用位移模态的4阶导数进行损伤识别的新方法。通过有限元建模和分析，对钢筋混凝土梁进行损伤识别和算例仿真，从而验证这种方法的敏感性和可行性。研究结果和分析算例表明：利用位移模态4阶导数分析，对结构单处损伤、多处损伤以及对不同的损伤程度都能有效识别，而且不需要结构损伤前的模态参数，显示了该指标检测损伤的优越性和有效性。
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| 关 键 词： | 位移模态 四阶导数 曲率模态 曲率模态差 损伤识别 |
Damage Identification of Beam Structures Based on Displacement Modal 4th Order Derivatives |
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| HAN Xi,XIANG Li,ZHONG Li. Damage Identification of Beam Structures Based on Displacement Modal 4th Order Derivatives[J]. Central South Highway Engineering, 2012, 0(4): 47-49,113 |
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| Authors: | HAN Xi XIANG Li ZHONG Li |
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| Affiliation: | 1. College of Civil Engineering ＆ Architecture, Chongqing Jiaotong University, Chongqing 400074, China; 2. College of Meehatronic and Automobile Engineering, Chongqing Jiaotong University, Chongqing 400074, China) |
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| Abstract: | Damage identification of structures is always the hot issue in engineering field, for the damage identification of concrete beams, a new method based on displacement modal 4th order derivatives is proposed in this paper. With damage identification and example simulation about reinforced concrete beams, the sensitivity and feasibility of the method are verified by using finite element modeling and analysis. The results show that this method can effectively identify the single damage, multiple damages or different extent of damage without modal parameters of undamaged structures, and it is verified that the index is predominant and effective. |
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| Keywords: | displacement mode 4th order derivatives mode curvature mode curvature difference damage identification |
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