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| Static damage identification method of random beam structure based on L1 regularization |
| Received:November 23, 2018 Revised:December 26, 2018 |
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| DOI：10.7511/jslx20181123002 |
| KeyWord:random beam structure damage identification measurement data L1 regularization damage probability |
| Author | Institution |
| 黄斌 |
武汉理工大学 土木工程与建筑学院, 武汉 |
| 鲁溢 |
武汉理工大学 土木工程与建筑学院, 武汉 |
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| Abstract: |
| This paper proposes a new static damage identification method of random beam structures based on a perturbation technique and L1 regularization method.Considering the impact of model uncertainty and measurement errors on damage identification,the control equations with respect to the random damage index of beam structures are established.Using the perturbation technique and L1 regularization,the solutions of the random control equations are determined.In this manner,the probability of structural damage can be achieved.From the test results,it is observed that the accuracy of the proposed method is higher than the least squares method to identify the locations and magnitudes of multiple local damages.The proposed method can be used in the damage detection of actual structures in the future. |