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논문 기본 정보

자료유형
학술저널
저자정보
Cho, Hyo-Nam (Department of Civil & Environmental Engineering, Hanyang University) Choi, Young-Min (Department of Civil & Environmental Engineering, Hanyang University) Lee, Sung-Chil (Department of Civil & Environmental Engineering, Hanyang University) Hur, Choon-Kun (Department of Civil & Environmental Engineering, Hanyang University)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제17권 제3호
발행연도
2004.1
수록면
483 - 492 (10page)

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This paper presents an efficient algorithm for the estimation of damage location and severity in bridge structures using Probabilistic Neural Network (PNN). Generally, the Back Propagation Neural Network (BPNN)-based damage detection methods need a lot of training patterns for neural network learning process and the optimum architecture of a BPNN is selected by trial and error. In this paper, the PNN instead of the conventional BPNN is used as a pattern classifier. The modal properties of damaged structure are somewhat different from those of undamaged one. The basic idea of proposed algorithm is that the PNN classifies a test pattern which consists of the modal characteristics from damaged structure, how close it is to each training pattern which is composed of the modal characteristics from various structural damage cases. In this algorithm, two PNNs are sequentially used. The first PNN estimates the damage location using mode shape and the results of the first PNN are put into the second PNN for the damage severity estimation using natural frequency. The proposed damage assessment algorithm using the PNN is applied to a cable-stayed bridge to verify its applicability.

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