Investigation of Damping Acceleration Ratio and Site Effects on Seismic Ground Response in the Duzce Region, Turkey
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CEPPIS_2018_ost_97-110.pdf (546.8 KB)
Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
BGJ Consulting
Abstract
The city of Duzce in Western Black Sea Turkey has a experienced of a destructive earthquake with Mw=7.2 in 1999 Duzce earthquake and is situated on the highly active Eursasian plate. The North Anatolian Fault Zone (NAFZ) crosses through Turkey from east to West; earthquake occured on this fault on August17, 1999 (Kocaeli) and November 12, 1999 (Düzce). Regional geology and subsoil conditions can change the site charecteristics of ground motion. Thus, detecting the soil magnification at the time of occuring an earthquake, especiallyfor weak soils, is crucial subject for investigators. In this research, one dimensional ground response behavior analyses were exucuted for Gölyaka area utilizing the August 17, 1999 Duzce e record with arthquake strong ground motion with DEEP SOIL software. Soil charecterstics and depth to engineering bedrock at the Gölyaka sites are various and the observed level of the constructional hazard at Gölyaka region at the time of occuring the Duzce earthquake was different as well. Findings revealed that higher magnifications ratios occur at higher periods due to soil behaviour. Result of this research revealed that local geological conditions can magnify ground motion at some periods and, acording to the amplification, and obtained response spectra can exceed the suggested design spectra. As aresult, it is appearent that local site conditions should be taken into consideration for earthquake- resistant engineering designs on soft soils.