Egeli, İsfendiyar
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Egeli, İ.
Egeli, Isfendiyar
Egeli, I
Egeli, I.
Egeli, İ
Egeli, Isfendiyar
Egeli, I
Egeli, I.
Egeli, İ
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03.03. Department of Civil Engineering
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Former Staff
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1NO POVERTY
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2ZERO HUNGER
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3GOOD HEALTH AND WELL-BEING
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4QUALITY EDUCATION
1
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5GENDER EQUALITY
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6CLEAN WATER AND SANITATION
2
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7AFFORDABLE AND CLEAN ENERGY
1
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8DECENT WORK AND ECONOMIC GROWTH
1
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
4
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10REDUCED INEQUALITIES
0
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11SUSTAINABLE CITIES AND COMMUNITIES
3
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
2
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13CLIMATE ACTION
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14LIFE BELOW WATER
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15LIFE ON LAND
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
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17PARTNERSHIPS FOR THE GOALS
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11
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83
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5
This researcher does not have a WoS ID.
Scholarly Output
11
Articles
7
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11973/3233
Supervised MSc Theses
3
Supervised PhD Theses
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WoS Citation Count
64
Scopus Citation Count
67
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0
WoS Citations per Publication
5.82
Scopus Citations per Publication
6.09
Open Access Source
7
Supervised Theses
3
| Journal | Count |
|---|---|
| 3rd International Conference on Road and Rail Infrastructure, CETRA 2014 | 1 |
| Arabian Journal for Science and Engineering | 1 |
| Bulletin of Engineering Geology and the Environment | 1 |
| Cement, Wapno, Beton | 1 |
| Revista de la Construccion | 1 |
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11 results
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Now showing 1 - 10 of 11
Article Citation - WoS: 4Citation - Scopus: 5Dynamic Analysis of an Immersed Tunnel in Izmir;(Pontificia Universidad Catolica de Chile, Escuela de Construccion Civil, 2018) Egeli,I.; Gurbuz,C.The original design of the planned Izmir Bay Immersed Tube Tunnel, considered it to be a continuous subsea tunnel for the whole length of about 7.6 km. But this was later changed into having 2 shorter tubes of 2.7 km long each connected thru’ a 2.2 km long artificial island created in the middle of the bay from the excess dredged material, a concept which also reduces costs and increases efficiency. This island will serve as a venue for the 2025 Expo Exhibition, which Izmir city will apply to organize in the future. Reason for the research study was to provide a preliminary design, using a dynamic analysis, during the current pre-feasibility stage, of the immersed tunnel to show whether it can be built across the Izmir Bay. This paper takes into account the new alignment and presents the results of a 2-D dynamic analysis conducted of the prefabricated 100m long tunnel elements, sitting within a backfilled dredged ditch, dug after the recommended ground improvement was carried out. Analyses considered staged construction and the results showed that: Tunnel units and its surrounding soils inside the dredged ditch act together to provide a better earthquake response with a damping effect of the earthquake force; Tunnel units do not float to the sea surface, but continued to stay inside the dredged ditch and applied positive stresses to the foundations during the design earthquakes. As there was no floating, there was no need for anchoring the tunnel to ditch bottom; Tunnel units and immersion joints (made of specified strong elastomer material) continued to stay in compression longitudinally and provided a superb water-tightness level; There were no risky (un-tolerable) ground deformations during, after striking of the design earthquakes. Total vertical and differential displacements of the tunnel units and in the surrounding soils were all at acceptable levels; Concrete surface crack widths occurring in the tunnel units, during striking of the design earthquakes were also found to be allowable. Study results show that the tunnel elements can withstand Mw=7 short duration (<10 sec) or Mw=6 long duration (>10 sec) earthquakes without major damages to their structure © 2018. Revista de la Construccion. All rights reserved.Conference Object Citation - WoS: 1Fem Analysis With Special Focus on Soil-Structure Interaction of Floating Slab-Track Infrastructure in High Speed Railway Embankments(University of Zagreb Faculty, 2014) Bakunowicz, Paulina; Demirci, Hasan Emre; Egeli, İsfendiyarUse of Floating Slab Track (FST) type infrastructure systems in high speed railway (HSR) embankments is becoming increasingly popular in the world today as well as a mean of vibration isolation and safe and fast rail travel. The main emphasis of this study is on the application of non-ballasted concepts for high-speed operation used in the design of Far Eastern HSR embankments and a manufactured floating slab track system. In this paper, finite element method (FEM) is used to model soil-structure interaction. Effects of soil stiffness (k(s)) are carefully investigated. Longitudinal settlements are obtained and checked against allowable values. The study has confirmed the quality and reliability of the FST systems, which continue to have huge use in high speed rail design-construction projects nowadays.Article Citation - WoS: 4Citation - Scopus: 3Designing High-Speed Train Railway Embankments Using Finite Element Analysis(Springer Verlag, 2012) Egeli, İsfendiyar; Usun, HandanDesign and construction of high-speed train railway (HSTR) infrastructure is different from that for normal trains, since high geometric standards and material properties are involved. For example, HSTR embankments are designed to limit total-differential settlements to minute amounts. In this study, a typical 'slab-track' type HSTR embankment was used to investigate the replaceability of one fill strata known as 'uncemented-prepared-subgrade layer' (U-PSL), constructed by using a locally obtained medium sand, as opposed to various 'cemented-prepared-subgrade layers' (C-PSL), whose mixes were prepared at two water-to-cement (w/c) ratios and three cement contents (c). Three size cylindrical samples were cast, 7-28 days water cured and were tested to obtain the unconfined compressive stresses, strains, elasticity moduli and Poisson's ratios at failure. Test results were then fed into the Plaxis-FEM program to find the maximum total settlements of individual layers and compared with the requirements. Only three C-PSL mixes having cement contents (c) of 20, 25, 30 % and water-to-cement (w/c) ratios of 0. 4 and 0. 5 met the strict settlement criteria. The study showed that the original (h = 2 m) thick U-PSL can be replaced with 0. 3h-m thick C-PSL at w/c = 0. 5 (i. e. h = 0. 6 m). Likewise, the original (h = 2 m) thick U-PSL can be replaced with 0. 2h-m thick C-PSL at w/c = 0. 4 (i. e. h = 0. 4 m). Also, the extra effort of doing in situ soil compaction and testing in layers is reduced or eliminated. This would give not only alternative ways to HSTR embankment designers/constructors, but also substantial savings in construction time and costs.Master Thesis An Experimental and Analytical Study of Various Soil Slopes in Laboratory Conditions(Izmir Institute of Technology, 2009) Pulat, Hasan Fırat; Egeli, İsfendiyarSlope stability is a significant subject of geotechnical engineering. Slope failures triggered by rainfall are causing considerable damage and loss of life every year throughout the world. Especially at dry seasons when the rainfall is scarce, the ground can develop considerable amount of suction and this improves the shear strength of the soil. In rainy season, when rainfall infiltrates into ground, suction decreases, while the shear strength also reduces, which may lead to slope instability. One of the principle objectives of this study is to represent the development of soil-water interaction modeling system (SWIMS) at IYTE. Using this system; effects of 3 different parameters, such as: initial water content, soil density, slope angle on modelling unsaturated slope stability were studied. Moreover, effects of infiltration on slope stability in shallow landslides, where it is assumed that the ground water tables are located at significant depths, were examined.In this thesis study, 12 main slope model experiments were completed in laboratory conditions, using Soil-Water Interaction Modelling System (SWIMS) by varying 3 different parameters. Result of studies shows that slope angle is the most important parameter affecting slope stability. Furthermore, parameters such as; soil density, degree of relative compaction of soil and initial water content affects slope stability, while these parameters also affect slope surface erosion and infiltration depths. In addition to experimental studies conducted in laboratory conditions with the 12 main slope model experiments, slope stability analyses to find FOS were performed by using Plaxis V9 (2D) finite element program (FEM), which uses shear strength reduction (SSR) technique and infiltration analyses using the Plaxflow module to model the rainwater infiltration into slope soil were performed. The FEM analyses show conforming results with the actual observations made using the tested soil model in laboratory conditions.Master Thesis Laboratory Tests To Study Stability Mechanism of Rainfall Infiltrated Unsaturated Fine-Grained Soil Slopes Developing Into Shallow Landslides and Their Hydraulic Properties(Izmir Institute of Technology, 2013) Şahin, Yavuz; Egeli, İsfendiyarThis study consists of two parts. In the first part, saturated soils wetting band infiltration theories and the most widely used in the world by Lumb, 1975 and Pradel and Raad, 1993 compares theoretical predictions were compared with observed results which gave poor correlations. Results showed that both theories grossly underestimated wetting-band thicknesses. Because above mentioned two theories result in constant values, instead of giving values changing as functions of time. These theories need corrections, which indicate need for further studies. In the second part, hydraulic properties were determined (water-retention, hydraulic-conductivity) of locally obtained 3 undisturbed soils near saturation with a new Hyprop testing technique using the evaporation method. As the Unified Soil Classification System (USCS) does not distinguish inorganic clay colloids by size (size <0,001 mm or 1000 nanometers), Lazer Diffraction Method was used. Results have shown that under zero overall stress; Matric suction does not stay constant, but increases with time up to a maximum point and then decreases, whereas time to reach maximum matric suction increases with decreasing plasticity index (PI) and colloid content (c). While maximum matric suction increases with PI and c, hydraulic conductivity and volumetric water content decreases with increasing matric suction. Also, hydraulic conductivity at maximum matric suction decreases with increasing PI and c.Article Citation - WoS: 1Artificial Neutral Networks To Predict Design Properties for Cemented Embankment Layers of High Speed Train Rail Ways(Foundation Cement, Lime, Concrete, 2013) Egeli, İsfendiyar; Tayfur, Gökmen; Yılmaz, E.; Uşun, HandanI. EGELI, G. TAYFUR, E. YILMAZ, H. USUN ARTIFICIAL NEURAL NETWORKS TO PREDICT DESIGN PROPERTIES FOR CEMENTED EMBANKMENT LAYERS OF HIGH SPEED TRAIN RAILWAYS Cement-Wapno-Beton, Vol. XVIII/LXXX, 2013, No 1, p. 10 High-speed train railway (HSTR) embankment is a complicated process, as it deals with high geometric design standards and material properties. In this study the replaceability of fill strata without cement prepared subgrade layer and with cement addition one is investigated. In the experiments the specimens composed of natural sand with different cement additions and two w/c ratios were used. The Plaxis-FEM (2D) program was employed to find the maximum expected total settlements of HSTR embankments with cemented subgrade layer. Furthermore, the artificial neural networks model was constructed to predict the failure stress, elasticity modulus and strains. The sensivity analysis has revealed that cement content was the most sensitive for stress and elasticity modulus predictions, while the curing age of specimens was for the strain forecast.Article Citation - WoS: 1Preliminary Design of an Immersed Tunnel in Izmir(Croatian Soc Civil Engineers-hsgi, 2012) Egeli, Isfendiyar; Kartaltepe, NisaPreliminary design of an immersed tunnel in Izmir Possibilities for building the Izmir Bay Immersed Tube Tunnel are analyzed in the paper. Study results show that the tunnel construction is feasible if a particular soil improvement is conducted properly. A minimum SPT-N value, compatible with concrete to be used in construction of the immersed tube, is defined so as to enable subsequent improvement of soil density. This procedure enables achievement of the minimum post-improvement soil-structure interaction stiffness level, as well as fulfilment of all other geotechnical criteria. This was demonstrated using the existing data about sub-sea soil in which the tunnel construction is planned.Master Thesis Laboratory Study for Determining Geotechnical Engineering Properties of Cement-Treated And-Untreared Backfill Soils Used in High Speed Railway Embankments(Izmir Institute of Technology, 2009) Uşun, Handan; Egeli, İsfendiyarFormation of high-speed train (HST) infrastructure is a rather new subject worldwide and in Turkey, as HST infrastructure is different than for normal train infrastructure (NTI). Existing NTI remains inadequate to meet high geometric and material properties required by HST. If strict criteria is not met, fatal accidents may occur. In this study; Taiwan HST Project.s design criteria and fill types were used to study replaceability of one fill strata called: Uncemented-Prepared Subgrade Layer (UPSL) with a cemented one (C-PSL) by conducting various laboratory tests to obtain soils. index properties and parameters, which were used to find the maximum total settlements by using Plaxis V8 (2D) Programme. For this purpose; 3 groups (totally 270 no.s with 90 no.s per group) of cylindirical concrete samples were obtained with various cement contents (10, 15, 20, 25, 30 % by weight of concrete) at 3 diameters (4, 8, 10 cm) and for 2 water-cement ratios (0.4, 0.5), then 7-28 day cured and tested at IYTEMAM to find elasticity modulus, stress, strain, force results. Using such results in the Plaxis Programme, maximum total settlements were calculated for different layers. C-CPSL mixes having 20-30% cement contents met the required strict settlement criteria as with the U-PSL mix currently used in Far-Eastern HST Projects. This showed that one of such C-PSL mixes can be used in place of U-PSL with an approximately 12.5 % reduction in the layer thickness, corresponding to 1.75m, instead of 2.0m thickness of the U-PSL currently used. Key Words: Transportation Embankments, High-Speed Train infrastructure, High-Speed Train Fill Properties.Article Citation - WoS: 9Citation - Scopus: 9The Effect of Soil Mineralogy and Pore Fluid Chemistry on the Suction and Swelling Behavior of Soils(Springer Verlag, 2014) Pulat, Hasan Fırat; Yükselen Aksoy, Yeliz; Egeli, İsfendiyarSoil suction is one of the most important parameters for describing the moisture condition and engineering behavior of unsaturated soils. Therefore, changes in suction behavior of soils in the presence of saline waters are important for engineered barriers. The aim of this study was to determine the change in suction and swelling behavior of soils, which were exposed to salt solutions (NaCl, CaCl2, natural seawater) with respect to distilled water. The three soil samples were gathered with different mineralogy and plasticity characteristics and tested for determining matric and total suction values and for obtaining free swelling characteristics in the presence of salt solutions. The bentonitic soil sample had the highest total suction value in the presence of seawater. Kaolinitic and zeolitic soil samples had the highest total suction values in the presence of NaCl solution. The highest modified free swell index value of the samples was obtained in the presence of NaCl solution for all the soil samples. No relationship was found between the total suction, matric suction and the modified free swell index value of the tested soils.Article Citation - WoS: 7Projektiranje Nasipa Zeljezničkih Pruga Primjenom Neuronskih Mreža(Croatian Soc Civil Engineers-hsgi, 2013) Tayfur, Gokmen; Egeli, IsfendiyarThe main requirement in the design of high-speed railway embankments are low values of total differential settlements. The use of cement stabilized layers in embankments, as compared to non-stabilized layers that are now most often in use, is analysed in the paper. Different cement proportions and different water/cement ratios for stabilized layers are considered. It was established that the use of cement stabilized layers in embankments can greatly reduce thickness of individual layers, while also reducing settlement. The research was conducted using the feed forward neural network.