Yazarlar

• Cakir, Tufan(3)
• Araz, Onur(1)
• Bednarik, M(1)
• Dogangun, A.(1)
• Drusa, M(1)
• Ferrero, AM(1)
• Livaoglu, R.(1)
• Marschalko, M(1)
• Ozturk, Kasif Furkan(1)
• Segallini, A(1)
• Yilmaz, I(1)

• MakaleYalnız künye2022/r/gumushane/12685
  A comparative study to determine seismic response of the box culvert wing wall under influence of soil-structure interaction considering different ground motions

  Ozturk, Kasif Furkan; Cakir, Tufan; Araz, Onur

  The present study deals with evaluation of the effects of different ground motions, backfill-structure interaction (BSI) and soil-structure interaction (SSI) on dynamic response of a box culvert wing wall. In obtaining numerical results, five different earthquake records with different frequency contents, five different backfill types and four different subsoil types are taken into account. Firstly, a finite element model (FEM) and three analytical models are proposed for analysis of the wing wall-backfill system under fixed-base case, and these fixed-base models are compared with each other through both modal analysis and displacement time-history analysis under the assumption of linear-elasticity. After validating the ability of the FEM approach, by extending the fixed-base FEM to take account of elastoplastic behavior of soil and SSI, a three dimensional (3-D) model has been described, and 3-D nonlinear analyses have been carried out in time domain. The numerical results show that the seismic response of the wing walls are affected remarkably by the SSI, BSI and frequency content of the earthquake.

  İncele
• BildiriAçık Erişim2015/r/gumushane/16637
  Finite Element Based Investigation of Backfill Effects on Seismic Behavior of a Cantilever Wall

  Cakir, Tufan; Drusa, M; Marschalko, M; Yilmaz, I; Segallini, A; Ferrero, AM; Bednarik, M

  A series of finite element analyses were conducted to investigate the backfill effects on seismic behavior of a cantilever retaining wall incorporating backfill and subsoil interactions. Considering four different backfill soil conditions, the dynamic analyses of backfill-cantilever wall-soil/foundation system were carried out in time domain through ANSYS general purpose finite element computer program. The cohesionless soil was modelled as an elasto-plastic medium with viscous boundary applied on the artificial boundary of soil to simulate the wave energy absorption. Backfill-cantilever wall interface behavior was taken into account by using interface elements between the wall and soil to allow for de-bonding. The magnitudes of lateral displacements and stresses were determined. The obtained results show that the earthquake behavior of cantilever retaining walls can change considerably due to the backfill interaction. Thus, the backfill interaction should be considered in design criteria of cantilever walls. (C) 2015 The Authors. Published by Elsevier B.V.

  İncele
• MakaleYalnız künye2014/r/gumushane/15716
  Backfill and subsoil interaction effects on seismic behavior of a cantilever wall

  Cakir, Tufan

  The main focus of the current study is to evaluate the dynamic behavior of a cantilever retaining wall considering backfill and soil/foundation interaction effects. For this purpose, a three-dimensional finite element model (FEM) with viscous boundary is developed to investigate the seismic response of the cantilever wall. To demonstrate the validity of the FEM, analytical examinations are carried out by using modal analysis technique. The model verification is accomplished by comparing its predictions to results from analytical method with satisfactory agreement. The method is then employed to further investigate parametrically the effects of not only backfill but also soil/foundation interactions. By means of changing the soil properties, some comparisons are made on lateral displacements and stress responses. It is concluded that the lateral displacements and stresses in the wall are remarkably affected by backfill and subsoil interactions, and the dynamic behavior of the cantilever retaining wall is highly sensitive to mechanical properties of the soil material.

  İncele
• MakaleYalnız künye2007/r/gumushane/14930
  Effect of foundation embedment on seismic behavior of elevated tanks considering fluid-structure-soil interaction

  Livaoglu, R.; Dogangun, A.

  This paper investigates the effects of foundation embedment on the seismic behavior of fluid-elevated tank-foundation-soil system with a structural frame supporting the fluid containing tank. Six different soil types defined in the well-known seismic codes were considered. Both the sloshing effects of the fluid and soil-structure interaction of the elevated tanks located on these six different soils were included in the analyses. Fluid-elevated tank-foundation-soil systems were modeled with the finite element (FE) technique. The fluid-structure interaction was taken into account using Lagrangian fluid FE approximation implemented in the general purpose structural analysis computer program, ANSYS. FE model with viscous boundary was used to include elevated tank-foundation-soil interaction effects. The models were analyzed for the foundations with and without embedment. It was found that the tank roof displacements were affected significantly by the embedment in soft soil, however, this effect was smaller for stiff soil types. Except for soft soil types, embedment did not affect the other response parameters, such as sloshing displacement, of the systems considered in this study.

  İncele