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Your search keyword '"ÇELEBİ, Erkan"' showing total 3 results
Start Over Author "ÇELEBİ, Erkan" Topic soil structure
3 results on '"ÇELEBİ, Erkan"'

1. Seismic codes based equivalent nonlinear and stochastic soil structure interaction analysis.

Author

Guellil, Mohamed Elhebib, Harichane, Zamila, and Çelebi, Erkan

Subjects
SOIL structure, MODULUS of rigidity, MONTE Carlo method, SOIL-structure interaction, SHEARING force
Abstract

The aim of this study is to consider the effects of the variation of shear modulus ratio (G/G0) and damping ratio (ξ) of soil, obtained by a linear iterative method based on the design spectra of seismic codes, the soil environment in terms of uncertainties in shear modulus using Monte Carlo simulations and the foundation damping (ξf) of flexible base for analyses of the Soil-Structure Interaction (SSI) problems. A squat structure with circular shallow foundation resting on a soil layer over a homogeneous half-space is studied by using cone model and considering seismic zone effect on structural response. Firstly, after showing the effects of the correction of G and ξ on impedance functions and the responses of soil-foundation-structure system, a study is carried out to compare these effects to those of the modelling of uncertainties in shear modulus as random variations. Secondly, a comparative analysis on design response spectra and base shear forces was carried out for four seismic codes (Algerian Seismic Rules RPA99-2003, Eurocode 8–2004, International Building Code IBC-2015 and Indian Code IS-1893-2002) considering the three cases of SSI: SSI effects (initial G and ξ), nonlinear SSI (corrected G and ξ) and stochastic SSI (random G with COV = 20%) compared to the fixed base case. Results show that the correction of G and ξ, according to the equivalent nonlinear method in all the cases, leads to a remarkable decrease in peak responses but show a huge amount of reduction in the second study for IBC-2015 and IS-1893-2002 codes compared to the other codes. [ABSTRACT FROM AUTHOR]

Published
2021
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2. YÜKSEK HIZ TRENLERİNİN ÇEVRE BİNALARDAKİ TİTREŞİM ETKİLERİNİN AZALTILMASI.

Author

ÇELEBİ, Erkan, KIRTEL, Osman, and AKTAŞ, Muharrem

Subjects
*RAILROAD research, *VIBRATION (Aeronautics), *COMPUTER simulation, *THEORY of wave motion, *SOIL structure
Abstract

In this paper, the goal is to primarily deal with the modeling of the railway traffic induced vibrations by using discrete computer models for analyzing related wave propagation problems with soil-structure interaction effects and mitigation of building responses by installation of wave barriers. Comprehensive parametric studies including the effects of localization and backfill material of trench barrier on the screening performance have been executed. [ABSTRACT FROM AUTHOR]

Published
2013

3. Numerical and experimental study on scaled soil-structure model for small shaking table tests

Author

Fatih Göktepe, Ahmad Jawad Omid, Erkan Çelebi, Goktepe, F, Celebi, E, Omid, AJ, Sakarya Üniversitesi/Mühendislik Fakültesi/İnşaat Mühendisliği Bölümü, Göktepe, Fatih, and Çelebi, Erkan

Subjects
Scale (ratio), business.industry, 0211 other engineering and technologies, Soil Science, Geology, 020101 civil engineering, Laminar flow, 02 engineering and technology, Structural engineering, Geotechnical Engineering and Engineering Geology, Finite element method, 0201 civil engineering, Acceleration, Soil structure, Earthquake shaking table, business, Representation (mathematics), Scaling, 021101 geological & geomatics engineering, Civil and Structural Engineering
Abstract

The goal of this study is to determine an appropriate geometric scaling coefficient for small-capacity shaking table tests representing the full-scale field conditions rigorously for the soil-structure interaction (SSI) problem. SSI effects on the dynamic response of the mid-rise reinforced concrete structures placing on silty sand soil under different earthquake motions for both actual system and scaled test model were directly analyzed by using 2D finite element method under plane-strain condition. Three different earthquake acceleration records as Chi-Chi (1999), Loma Prieta (1989) and Kocaeli (1999) have been considered at the bedrock level of the soil-structure system for this study. In the first phase of this work, the representation capacity of the employed scaling factor of 1:45 are evaluated by comparing the structural lateral displacements obtained from the fixed-base and flexible base analysis for full-scale field conditions with those for scaled test model to be experimentally examined in the small-capacity shaking table. The scaled geotechnical model is composed of the undisturbed soil specimen taken from the real site and the laminar soil container designed to be formed of aluminum frames and rubber layers. Afterward, the obtained results from the scaled numerical model of the soil-structure coupled system have been validated and verified by those of employing experimental shaking table tests. According to the obtained numerical and laboratory test results, it is concluded that the carefully selected large geometric scale coefficients for the soil-structure model used in the small-scale shaking table experiments can capture the dynamic response of the full-scale soil-structure system with acceptable accuracy. It is clearly observed that the local soil properties have considerably amplified the earthquake response of the structures in comparison to the fixed base structure. Furthermore, the structural behavior is significantly affected by the frequency content of the earthquakes considered in the SSI problem.

Published
2019

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