University of Qom Civil Infrastructure Researches 2783-140X 5 1 2019 08 23 The Effects of Underground Structure on the Free Field Displacement Under Uniform and Non-Uniform Excitation The Effects of Underground Structure on the Free Field Displacement Under Uniform and Non-Uniform Excitation 61 75 1448 10.22091/cer.2019.4760.1167 FA Mohsen Isari PhD, Faculty of Civil Engineering, University of Tabriz, 29 Bahman Blvd. 5166616471, Tabriz, Iran. Reza Tarinejad Associate Professor, Faculty of Civil Engineering, University of Tabriz, 29 Bahman Blvd. 5166616471, Tabriz, Iran. Seyed Kazem Razavi PhD Candidate, Faculty of Civil Engineering, University of Tabriz, 29 Bahman Blvd. 5166616471, Tabriz, Iran. Journal Article 2019 08 26 In this study, the effects of a subway station on the surface ground motion subjected to uniform and the non-uniform propagating seismic wave is investigated. Numerical analysis is carried out by finite difference method using FLAC soft-ware. Seismic wave scattering considering and ignoring the effects of the underground station in the case of uniform and non-uniform excitation is performed, and corresponding am-plification factors on the fee field displacement are discussed. The major results of this study indicated that the possible large amplification factor on seismic waves considering the underground station is obtained. Therefore, it should be paid more attention to seismic design for surface structures. In this study, the effects of a subway station on the surface ground motion subjected to uniform and the non-uniform propagating seismic wave is investigated. Numerical analysis is carried out by finite difference method using FLAC soft-ware. Seismic wave scattering considering and ignoring the effects of the underground station in the case of uniform and non-uniform excitation is performed, and corresponding am-plification factors on the fee field displacement are discussed. The major results of this study indicated that the possible large amplification factor on seismic waves considering the underground station is obtained. Therefore, it should be paid more attention to seismic design for surface structures. Uniform Excitation Amplification Underground Structure Finite difference Non-Uniform Excitation https://cer.qom.ac.ir/article_1448_71c973abfc64c9bd357e58ccf59538aa.pdf