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| Structural damage assessment based on static residual force vector |
| Received:September 09, 2020 Revised:October 09, 2020 |
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| DOI：10.7511/jslx20200909001 |
| KeyWord:damage identification residual force vector static test model reduction displacement algebraic solutio |
| Author | Institution |
| 杨秋伟 |
绍兴文理学院 土木工程系, 绍兴 ;宁波工程学院 建筑与交通工程学院, 宁波 ;宁波工程学院 浙江省土木工程工业化建造工程技术研究中心, 宁波 |
| 周聪 |
绍兴文理学院 土木工程系, 绍兴 ;宁波工程学院 建筑与交通工程学院, 宁波 ;宁波工程学院 浙江省土木工程工业化建造工程技术研究中心, 宁波 |
| 李翠红 |
绍兴文理学院 土木工程系, 绍兴 |
| 罗帅 |
绍兴文理学院 土木工程系, 绍兴 |
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| Abstract: |
| The residual force vector method is a kind of commonly used damage identification method.The existing residual force vector method is based on the modal parameters of a dynamic test.Compared with the dynamic test data, the static test data often have higher accuracy and do not need complex operations such as modal analysis.In view of this, this paper presents a static residual force vector method for structural damage assessment.Based on the static displacement data and the stiffness matrix of structural finite element model, the static residual force vector is defined and the damage degrees of freedom are evaluated according to the non-zero elements in the vector.Then the position of the damage can be determined according to the relationship between the degrees of freedom and the elements.Moreover, an algebraic solution to the damage parameters is also proposed in this work.In addition, a static condensation residual force vector method is further developed to overcome the difficulty of measuring the angular degrees of freedom.The proposed method is verified by a truss structure and a beam structure model.The numerical results show that the proposed method is reasonable and effective. |
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