Experimental and analytical system identification of Eynel arch type steel highway bridge |
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| Affiliation: | 1. Karadeniz Technical University, Department of Civil Engineering, 61080, Trabzon, Turkey;2. Gümüşhane University, Department of Civil Engineering, 29000, Gümüşhane, Turkey;3. Prokon Engineering and Consultancy Inc., 29000, Ankara, Turkey;1. Politecnico di Milano, Department of Architecture, Built Environment and Construction Engineering, Italy;2. Université Paris-Est, IFSTTAR, France;3. ADVITAM, VINCI, France;4. NECS, France;5. LUNAM Université, IFSTTAR, France;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China;1. Dept. of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. Dept. of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, United States;1. INSIGNEO Institute for In-silico Medicine, The University of Sheffield, Department of Civil & Structural Engineering, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK;2. University of Exeter, College of Engineering, Mathematics and Physical Sciences, Vibration Engineering Section, North Park Road, Exeter EX4 4QF, UK;3. Politecnico di Milano, Department of Civil and Environmental Engineering, Piazza di Leonardo Da Vinci 32, Milano 20133, Italy;4. University of Warwick, School of Engineering, Coventry CV4 7AL, UK;1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China;2. Department of Civil & Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;3. CCCC Second Highway Consultants, Wuhan, Hubei 430056, PR China |
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| Abstract: | This paper describes a full scale arch type steel highway bridges, its finite element modelling and Operational Modal Analysis. Eynel Highway Bridge which has arch type structural system with a total length of 336 m and located in the Ayvacık county of Samsun, Turkey is selected as a case study. The bridge connects the villages which are separated with Suat Uğurlu Dam Lake. The three dimensional finite element model is constructed using project drawings and an analytical modal analysis is then performed to generate natural frequencies and mode shapes in the three-orthogonal directions. The ambient vibration tests on the bridge deck under natural excitation such as traffic, human walking and wind loads are conducted using Operational Modal Analysis. Sensitive seismic accelerometers are used to collect signals obtained from the experimental tests. To obtain experimental dynamic characteristics, two output-only system identification methods are employed namely, Enhanced Frequency Domain Decomposition method in the frequency domain and Stochastic Subspace Identification method in time domain. The correlation between the finite element model and experimental results is studied. Good agreement is found between dynamic characteristics in the all measurement test setups performed on the bridge deck. It is demonstrated that the ambient vibration measurements using Enhanced Frequency Domain Decomposition and Stochastic Subspace Identification methods are enough to identify the most significant modes of steel highway bridges. It is seen that there are some differences between analytical and experimental natural frequencies and experimental natural frequencies are generally bigger than the others. |
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