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Risk, Disaster Management and Strategic Planning, Institute of Earthquake Engineering and Engineering Seismology, Saints Cyril and Methodius University of Skopje , Skopje , North Macedonia
GEOTECHNICS AND SPECIAL STRUCTURES, Institute of Earthquake Engineering and Engineering Seismology, Saints Cyril and Methodius University of Skopje , Skopje , North Macedonia
Saints Cyril and Methodius University of Skopje , Skopje , North Macedonia
ENGINEERING STRUCTURES AND SOFTWARE, INSTITUTE OF EARTHQUAKE ENGINEERING AND ENGINEERING SEISMOLOGY, Saints Cyril and Methodius University of Skopje , Skopje , North Macedonia
Saints Cyril and Methodius University of Skopje , Skopje , North Macedonia
GEOTECHNICS AND SPECIAL STRUCTURES, Institute of Earthquake Engineering and engineering seismology, Saints Cyril and Methodius University of Skopje , Skopje , North Macedonia
The effects of soil-structure interaction (SSI) are usually neglected in the current practice of seismic analysis and design of bridges. The objective of this research study is to assess the significance of SSI for the seismic response of multi span reinforced concrete girder bridges. The focus is on the behaviour of the integrated global bridge structural system. The study is based on the representation of a soil-bridge system. It has been found that SSI greatly affects the dynamic behaviour of bridge piers, leading to more flexible systems and larger total displacements. The soil medium has been analysed by applying different soil densities in order to consider the soil stiffness. The study has focused on soil structure interaction effects, and the results are analysed accordingly. The soil medium has been taken into consideration as a four-layered infill, as a dense and loose medium. The bridge structure is taken to be an RC structure. The boundaries of the soil medium are considered as infinite elements in order to absorb the radiating waves. Related comparisons are done with references and experimental results, in which considerably acceptable results are obtained. The newly proposed methodology efficiently models both the interaction of soil and bridge structures and simultaneously the far
field of the soil model in which the wave reflections are softened. The case study chosen in this work considers different strengths of soil models on which the bridge structural response is analysed in detail.
soil-structure interaction, frame structure, seismic evaluation, numerical modeling, Eurocode 8
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