Shamekhi, ShimaAnsal, Mustafa AtillaKurtuluş, Aslı2023-09-152023-09-1520232366-2557http://hdl.handle.net/10679/8842https://doi.org/10.1007/978-3-031-20172-1_38The objective of the present work is to evaluate the necessity of 2D site response analysis based on the comparison among the peak ground and spectral accelerations recorded by Istanbul Rapid Response Network and Istanbul vertical array stations during the Mw = 6.5 24/5/2014 Gökçeada and Mw = 5.9 19/5/2011 Kütahya earthquakes with the calculated accelerations by 1D and 2D site response analyses. The shear wave velocity profiles determined based on in-situ geophysical and geotechnical measurements and laboratory tests within the Istanbul Microzonation Project are revaluated adopting a revision scheme to obtain the best fits between the recorded and calculated spectral accelerations by 1D site response analysis. These modified shear wave velocity profiles are later used for 1D and 2D site response analyses performed in North–South and East–West directions to model peak ground and spectral accelerations on the ground surface. Finally, by modelling different distances around boreholes the influence of variation of the soil profile in horizontal direction is investigated by 2D analyses.enginfo:eu-repo/semantics/restrictedAccessConference paper30539340100100651710003810.1007/978-3-031-20172-1_381D and 2D site response analysesEffect of site conditionsHorizontal heterogeneityIstanbul rapid response networkVertical strong motion arrays2-s2.0-85151050394