On prediction of stiffness variation of slender members using impact responses
| Autor: | Chi-Hung Chiang, Chia-Chi Cheng, Jiunnren Lai, Chih-Peng Yu |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Journal of the Chinese Institute of Engineers. 36:627-637 |
| ISSN: | 2158-7299 0253-3839 |
| DOI: | 10.1080/02533839.2012.736777 |
| Popis: | Vibration tests and elastic wave techniques have been applied to assess the integrity of slender members extensively. Impact tests incorporating simple calculation formulae have the ability to serve as front-line methods for quick diagnosis of structures with a large amount of potentially damaged members. This article proposes a methodology involving complex quotient of transfer functions, apparent segmental flexibility, and pseudo-profile of dynamic responses. The theoretical background is reviewed first, followed by a series of numerical simulations of impact tests. The accuracy of defect information extracted from each method is evaluated and compared. Procedures for recovering possible stiffness variations of slender members with these approaches are outlined and illustrated with examples of a simply supported beam. Results of these simulations have demonstrated that the proposed methodology is very promising in obtaining flexural stiffness and defect information on slender members. |
| Databáze: | OpenAIRE |
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