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논문 기본 정보

자료유형
학술저널
저자정보
Mahmoud Bayat (Islamic Azad University) Hamid Reza Ahmadi (University of Maragheh) Navideh Mahdavi (Islamic Azad University)
저널정보
국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.71 No.1
발행연도
2019.1
수록면
57 - 63 (7page)

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초록· 키워드

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During the last two decades, much joint research regarding vibration based methods has been done, leading to developing various algorithms and techniques. These algorithms and techniques can be divided into modal methods and signal methods. Although modal methods have been widely used for health monitoring and damage detection, signal methods due to higher efficiency have received considerable attention in various fields, including aerospace, mechanical and civil engineering. Signal-based methods are derived directly from the recorded responses through signal processing algorithms to detect damage. According to different signal processing techniques, signal-based methods can be divided into three categories including time domain methods, frequency domain methods, and time-frequency domain methods. The frequency domain methods are well-known and interest in using them has increased in recent years. To determine dynamic behaviours, to identify systems and to detect damages of bridges, different methods and algorithms have been proposed by researchers. In this study, a new algorithm to detect seismic damage in the bridge’s piers is suggested. To evaluate the algorithm, an analytical model of a bridge with simple spans is used. Based on the algorithm, before and after damage, the bridge is excited by a sine force, and the piers’ responses are measured. The dynamic specifications of the bridge are extracted by Power Spectral Density function. In addition, the Least Square Method is used to detect damage in the bridge’s piers. The results indicate that the proposed algorithm can identify the seismic damage effectively. The algorithm is output-only method and measuring the excitation force is not needed. Moreover, the proposed approach does not need numerical models.
#moment-rotation #forecasting #extreme learning machine #precast beam-to-column connection #partly hidden corbel

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참고문헌 (51)

참고문헌 신청
Hamid Reza Ahmadi / 2018 / New damage index based on least squares distance for damage diagnosis in steel girder of bridge's deck / Structural Control and Health Monitoring 25(10):e2232 Crossref H. R. Ahmadi / 2015 / New damage indices and algorithm based on square time-frequency distribution for damage detection in concrete piers of railroad bridges / Structural Control and Health Monitoring 22(1):91~106 Crossref Aviram, A. / 2008 / Guidelines for nonlinear analysis of bridge structures in California / Pacific Earthquake Engineering Research Center google schola M. Bayat / 2015 / A novel proficient and sufficient intensity measure for probabilistic analysis of skewed highway bridges / Structural Engineering and Mechanics, An Int＇l Journal 55(6):1177~1202 google schola Dionisio Bernal / 2002 / Load Vectors for Damage Localization / Journal of Engineering Mechanics 128(1):7~14 Crossref

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