Bornova ovası ve çevresinin (İzmir Körfezi Doğusu/Batı Türkiye) zemin dinamik özelliklerinin araştırılması ve zemin-anakaya arayüzeylerinin modellenmesi

In order to control the possible damages that may occur during the earthquake, soil dynamic behaviour under the unique dynamic earthquake load to the study area should be defined accurately and reliably. For this purpose, studies of earthquake hazard analysis studies, determination of soil dynamic characteristics, soil-bedrock models used for soil deformation analysis and ground response analyzes are required for the study area. Within the scope of this thesis, earthquake hazard analysis was firstly carried out for İzmir and its surroundings. In the next stage, the soil dynamic characteristics of the Bornova Plain and its surroundings were investigated by using surface wave methods and previously geotechnical studies in the study area. In addition, NEHRP soil classification and soil-structure resonance maps were created. According to these studies, risk maps were prepared for the study area. At the final stage of the thesis, surface wave and microgravity methods were used together to model 2D and 3D soil-bedrock interfaces. As a result of seismic hazard analysis studies, it was determined that the b value changes from 0.6 to 1.05. The return period varies from 20 to 140 years for M= 6.0. The predominant period values are between 0.4-1.6 sec and Vs30 values were obtained between 100 m/sec and 1500 m/sec. There is resonance risk that the buildings which have periods varying from 1 to 1.6 sec within Bornova Plain. Gmax calculated up to 50 m depth and Gmax values range between 280 kg/cm2-100000 kg/cm2. According to the NEHRP, B-C and F soil classes have been spotted in the whole study area. According to soil-bedrock models, the soil thickness is in the range of 300-400 m in Bornova Plain. Focusing problems can be seen in Bornova Plain during an earthquake. The interfaces of soil-bedrock don't have the feature of horizontal and semi-infinite.