Ozan Subaşi

Istanbul Technical University · Department of Civil Engineering

As well known, local soil condition at a specific site affects the significant features of strong ground motion such as amplitude, frequency range and time duration. The effects of site condition depend on the properties of the motion characteristics, material properties, topography and geometry of the field. The bedrock slope at the basin sides al...

Özet: Depremler sırasında zemin tabakalarında oluşan deformasyon seviyeleri, yapı-zemin etkileşiminde önemli rol oynamaktadır. Kuvvetli yer hareketi kayıtları kullanılarak yapılan bir boyutlu (1D) dinamik analizlerle yüzeye yakın zemin tabakaları için hesaplanan kayma şekil değiştirmeleri; küçük genlikli titreşimler-mikrotremor verisi analiz sonuçl...

Depremlerin zemin tabakalarında neden olduğu kayma deformasyonu seviyeleri, yapısal hasarı etkileyen önemli faktörlerden biridir. Zemin tabakalarında depremler sırasında oluşacak şekil değiştirmeleri genelde kuvvetli yer hareketi kayıtları kullanılarak yapılan bir boyutlu (1D) dinamik analizler ile belirlenebilmektedir. Küçük genlikli titreşimler o...

Estimation of soil behavior under dynamic loading has great importance in reducing the damage that may occur in an earthquake. With this purpose, microtremor measurements were performed in a specific site to define dynamic behavior in terms of shear strain. The study area was divided into square shaped cells with 200mx200m dimensions in order to im...

ABSTRACT: Estimation of soil behavior under dynamic loading has great importance in re-ducing the damage that may occur in an earthquake. For this reason, microtremor measure-ments were performed in a specific site to define dynamic behavior in terms of shear strain. The study area was divided into square shaped cells with 200m'x'200m dimensions in...

Zusammenfassung Für die Planung und Auslegung von Bauwerken in Erdbebengebieten mit hohen Grundwasserständen ist das Verflüssigungspotenzial des Baugrunds zu untersuchen und zu bewerten. In DIN EN 1998-5:2010-12 (2010) sind die auf SPT-Schlagzahlen basierenden Diagramme für die Beurteilung der Verflüssigungsgefährdung angegeben. Im vorliegenden Bei...

One of the most important factors that increase the destructive effects of earthquakes and structural damages is the soil deformations during strong ground motion. The liquefaction occurs especially in saturated sandy soils as a result of the sudden increase in pore water pressure during the earthquakes and leads to large deformations in the soil l...

The present paper treats the estimation of liquefaction-induced, free-field settlements using two-dimensional, fully coupled, finite element (FE) analyses. The PM4Sand model is used to simulate the liquefaction behavior of a homogeneous sand layer with three different relative densities of 35%, 55%, 75% under eleven different strong ground motions....

The destructive effects of earthquakes negatively affect many people's lives and cause a large number of lives and property losses. One of the most crucial factors that increase the destructive effects and structural damages of earthquakes is the deformations in the soil layers during strong ground motion. Especially liquefaction due to sudden incr...