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자료유형
학술저널
저자정보
El-Borgi, S. (Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School) Choura, S. (Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School) Ventura, C. (Department of Civil Engineering, University of British Columbia) Baccouch, M. (Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School) Cherif, F. (Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제1권 제1호
발행연도
2005.1
수록면
83 - 101 (19page)

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This paper summarizes the application of a rational methodology for the structural assessment of older reinforced concrete Tunisian bridges. This methodology is based on ambient vibration measurement of the bridge, identification of the structure's modal signature and finite element model updating. The selected case study is the Boujnah bridge of the Tunis-Msaken Highway. This bridge is made of a continuous four-span simply supported reinforced concrete slab without girders resting on elastomeric bearings at each support. Ambient vibration tests were conducted on the bridge using a data acquisition system with nine force-balance accelerometers placed at selected locations of the bridge. The Enhanced Frequency Domain Decomposition technique was applied to extract the dynamic characteristics of the bridge. The finite element model was updated in order to obtain a reasonable correlation between experimental and numerical modal properties. For the model updating part of the study, the parameters selected for the updating process include the concrete modulus of elasticity, the elastic bearing stiffness and the foundation spring stiffnesses. The primary objective of the paper is to demonstrate the use of the Enhanced Frequency Domain Decomposition technique combined with model updating to provide data that could be used to assess the structural condition of the selected bridge. The application of the proposed methodology led to a relatively faithful linear elastic model of the bridge in its present condition.

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