Demiröz, Atila
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Demiroz, Atila
Demi̇röz, Atila
Demiröz, A.
Demiroz, A.
Demi̇röz, Atila
Demiröz, A.
Demiroz, A.
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ademiroz@ktun.edu.tr
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02.02. Department of Civil Engineering
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| Journal | Count |
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| Advanced Engineering Science | 2 |
| International Journal Of Geosynthetics And Ground Engineering | 2 |
| Selçuk-Teknik Dergisi | 2 |
| Selcuk University Journal of Engineering Sciences | 2 |
| Gazi Mühendislik Bilimleri Dergisi (GMBD) | 1 |
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Master Thesis Konya İli, Organize Sanayi Bölgesi Zeminlerin Dinamik Davranışının Eşdeğer ve Doğrusal Olmayan Analiz Yöntemleri ile İncelenmesi(Konya Teknik Üniversitesi, 2021) Yıldız, Fatih; Demiröz, AtilaSismik olarak aktif bölgelerde, dünyanın oluşumundan beri yerkabuğundaki kırılmalar neticesinde aniden meydana çıkan titreşim dalgaları ile depremler oluşmaktadır. Depremlerin etkisinde zeminlerin göstereceği davranışların önceden tahmin edilebilmesi ve belirlenmesi yapıların tasarımında büyük önem arz etmektedir. Bizim ülkemiz de depremler açısından aktif bir ülke olarak nitelendirilmektedir. Bilindiği üzere zeminler, üzerlerine etkiyen belli frekanslardaki sismik dalgaları sönümlendirerek etkisini azaltabilmekteyken bazı frekansları da büyütücü etkilere sahip olabilmektedir. Bundan kaynaklı olarak da zeminlerin dinamik davranışlarının mutlaka analizler ile belirlenmesi gerekmektedir. Tez çalışması kapsamında; Konya İli Organize Sanayi Bölgesinde yer alan farklı konumlardaki beş bölge belirlenmiş ve her bir bölge için 10'ar adet olmak üzere toplam 50 adet sondaj kuyusu seçilmiştir. Analizlerde kullanılacak olan veriler bölgeden temin edilmiş ve temsil edilmiş zemin profilleri oluşturulmuştur. Elde edilen zemin profilleri DEEPSOIL ve EERA (Equivalent-linear Earhquake site Response Analyses) programları kullanılarak eşdeğer lineer ve nonlineer olarak analiz edilmiştir. Beş bölgede yapılan analizler neticesinde elde edilen maksimum yüzey ivmeleri, spektral ivmeler, zemin büyütmeleri gibi değerler karşılaştırmalı olarak detaylıca irdelenmiştir.Master Thesis Demiryolu Altyapısının Derin Karıştırma ve Novocrete® Kullanılarak İyileştirilmesi(Konya Teknik Üniversitesi, 2019) Arık, Serdar; Demiröz, AtilaSon yıllarda Dünya'da ve ülkemizde gelişen teknoloji, değişen ihtiyaçlar, ekonomik büyüme, nüfus artışı ve iklim değişiklikleri gibi nedenlerle güvenli, hızlı ve konforlu ulaşım talepleri artmış ve ulaştırmada da demiryollarının önemi ve gelişimi ön plana çıkmıştır. Tez kapsamında, demiryollarında altyapı inşasının önemine değinilmiş ve yapılacak olan altyapı inşası esnasında güzergâhın geçtiği zemin özellikleri ve kriterlerin sağlanamadığı kesimlerde uygulanacak zemin iyileştirme yöntemlerine değinilmiştir. Bununla birlikte, tez kapsamında Adana-İncirlik-Toprakkale hat kesiminde mevcut hattın rehabilitasyonu ve 2. hat yapılması işleri kapsamında, arazinin araştırma öncesinde yapılan literatür çalışmasıyla jeolojik ve geoteknik bilgileri bir bütün halinde ele alınmıştır. Zemin üzerinde yapılan deney sonuçları değerlendirilmiş ve bu değerlendirmeler sonucunda söz konusu projede Novocrete® ve derin karıştırma yöntemi uygulanması suretiyle yapılan zemin iyileştirmelerine değinilmiş ve hesaplamalara yer verilmiştir.Article Investigation of the Strength of Reinforced Masonry Walls Under the Effect of Earthquake Using Geogrid(Springer India, 2025) Demiroz, Atila; Donduren, Mahmud Sami; Hamed, ElnourIn this study, the investigation focuses on enhancing the structural integrity of brick wall samples by incorporating geogrid materials of varying strengths. The collapse and shear strengths under horizontal loads were examined in planes, and the results were compared. A comparative analysis has been conducted to evaluate the use of both uniaxial and biaxial geogrid as confinement reinforcement on the surfaces of brick masonry specimens. To draw a comparison, unreinforced masonry walls, masonry walls completely reinforced with uniaxial geogrid material, and masonry wall samples fully reinforced with biaxial geogrid material were created. Moreover, 12 experiments have been carried out, in which the standard slip stress experiment technique recommended by ASTM 1391-81 for masonry wall samples was used. The observed behaviors in the experimental samples including formed cracks, horizontal load-displacement graphs, and energy absorption capacities were compared. The achieved result showed that the masonry wall reinforced with biaxial geogrid material showed a 10% higher load capacity than the unreinforced masonry wall.Master Thesis Mineral Katkı Malzemeleri ile Çimento Karışımların Jet Grout Kolonlarında Mekanik Özelliklerinin Araştırılması(Konya Teknik Üniversitesi, 2020) Çalı, Yasin; Demiröz, Atilaİnşaat sektörü son yıllarda ortaya çıkan inşaat teknikleri ile birlikte büyük değişimler yaşamıştır. Teknolojideki ilerlemeler inşaat piyasasında kullanılan yapı malzemelerinin de çeşitlenmesinde önemli bir etkendir. Zemin iyileştirmesinin yapıldığı, depreme, sıvılaşmaya ve farklı oturmalara karşı çok daha dayanıklı yapılar inşa edilmeye başlanmıştır. Doğal kaynakların azalması, hava ve çevre kirliliği endüstriyel atıkların kullanılmasına yönlendirmiştir. Uçucu Kül (UK), Silis Dumanı (SD) ve Yüksek Fırın Cürufu (YFC) puzolanik özelliklerinden dolayı çimento veya betonda kullanılan atık malzemelerin en etkili olanlarıdır. Jet Grout (JG) yöntemiyle zeminin iyileştirilmesi çağımızda kullanımı oldukça yaygındır. Bu çalışmada Katkısız Portland Çimentosu (CEM-I 42,5R) ve çimento ağırlığının %10 ve %20'si oranında Silis Dumanı (SD), %10 ve %20'si oranında F tipi Uçucu Kül (UK), %1 ve %2'si oranında Hiper Akışkanlaştırıcı (HA) bağlayıcı malzeme kullanılmış olup, bunların karışımlarından su/bağlayıcı oranı 0.8 olan 81 farklı enjeksiyon numunesi hazırlanmıştır. Hazırlanan numuneler 28 ve 56 gün nemi değişmeyecek şekilde bekletildikten sonra üzerinde serbest basınç ve yarmada çekme (brezilyan) dayanım deneyleri yapılmıştır. Ayrıca optimum sonuçlarda ve Jet groutta karışım yapılabilecek 16 tasarım belirlenmiş ve JG kolonu oluşturulmuştur. Oluşturulan 27 farklı numune ve 16 tasarım içerisinde 28 günde %10 SD, %1 HA içeren numunede en yüksek dayanım (Ort. 24,66 MPa) elde edilirken, 56 günde %20 SD, %10 UK, %2 HA içeren numunede en yüksek dayanım (Ort. 25,83 MPa), %10 SD, %10 UK, %1 HA içeren JG kolonda en yüksek dayanım (Ort. 26,72 MPa), kaydedilmiştir. Kısa vadede (28 gün) silis dumanı dayanımı hızlı artırırken, uzun vadede (56 gün) uçucu kül içeren numuneler ve JG kolonlar geç dayanım kazanmıştır.Article Seismic Response Analysis of Different Soil Types With Equivalent Linear Analysis Method(Konya Teknik University, 2025) Bozkurt, Raziye; Demiröz, AtilaIn this study; With DEEPSOIL v7 software, seismic behavior analyzes of a region were made with 1D, “Equivalent Linear Analysis Method”. The method that offers the closest solution to the reality in the solution of engineering problems is the nonlinear solution method. However, it is very difficult to obtain and analyze the necessary parameters. For this reason, this method was chosen, which is not difficult to solve and gives the closest results to the nonlinear solution. Analyzes were made in the direction of whether the soil profile will absorb the earthquake in the event of a possible earthquake or, on the contrary, will increase the earthquake effect and transmit it to the building foundation. As a result of the analysis, the peak acceleration values were calculated and defined with acceleration-time-depth graphs. In this study, in which the seismic responses of different types of soil structures were investigated, it was observed that the soil structure was non-linear, the shear wave velocity value was an important parameter in determining the dynamic behavior of the soil, and the damping ratio of the soil increased with the increase in the shear wave velocity value.Article Citation - WoS: 5Citation - Scopus: 6Enhancement of the Strength and Permeability Properties of an Expansive Soil Using Chopped Basalt Fibers and Silica Fume(Springer Int Publ Ag, 2023) Saran, Onur; Demiröz, AtilaClays are soils that display plastic behaviors, have substantially lowered strength at high water content values, and can show significant subsidence. To construct on these soils, the engineering properties of the ground need to be improved. The engineering properties of clayey soils can be improved using chemical additives such as cement, lime, silica fume, and fly ash. Additionally, in recent years, the number of studies on the use of fibers in soil improvement has been increasing. In this study, the effects of basalt fiber and silica fume additives on the strength and permeability properties of problematic soil were investigated. For this purpose, varying values of basalt fiber length (6-24 mm), basalt fiber content (0-1.5%), curing time (1-56 days), and silica fume content (0-15%) were selected. Experiments were conducted using the Taguchi method with an L-16 orthogonal array with 4 parameters and 4 levels. Specimens that were prepared at the optimum water content and maximum density values were subjected to unconfined compression, splitting tensile, and permeability tests. According to the results of the statistical analyses, the optimum parameters for the unconfined compressive strength and splitting tensile strength experiments were determined as a basalt fiber length of 18 mm, a basalt fiber content of 1%, a silica fume content of 10%, and a curing time of 56 days. As the length and content of basalt fibers increased, the permeability coefficient of the material also increased. On the other hand, the permeability coefficient of the material decreased when the silica fume content increased.Article Investigation of Soil Dynamic Behavior by Using Equivalental Linear Analysis Method: Example of Aksaray Doğantarla(2020) Demiröz, Atila; Bozkurt, RaziyeEarthquake is a natural disaster type that deeply affects life. Although it differs according to the geotechnical properties of the ground, it can cause serious loss of life and property in some cases depending on the intensity of the earthquake. The vibration waves that occur with sudden breaks in the earth’ s crust create an earthquake. The fact that the earthquake time and severity are not known in advance, the stratified and unknown structure of the ground makes the situation more complicated. For this reason, it is necessary to determine the earthquake properties correctly and take necessary measures in advance. Therefore, it is deemed appropriate to determine the dynamic behavior of the soil in case of an earthquake, by determining it with field and laboratory studies and making the necessary analyzes. For this purpose, many software programs have been developed. In the developed software programs, the required data can be entered into the system and the dynamic behavior of the ground can be analyzed seismically. In the light of this information, for the study of Aksaray Doğantarla, Turkey Building Seismic Code also suggested the equivalent dynamic behavior of the soil using linear analysis methods were investigated. Using the soundings and seismic studies in the region, the possible behavior of the soil at the time of the earthquake was interpreted.Article Citation - WoS: 2Citation - Scopus: 2Investigation of the Effects of Mixtures of Fly Ash and Cement Types on Jet-Grout Columns(Springer Int Publ Ag, 2023) Demiröz, Atila; Battal, HursitIn recent years, the jet-grout (JG) technique has been one of the most preferred soil improvement methods. The specimen column diameter-length, grouting pressure, rod linear-rotational speed, nozzle diameter-number, water/cement ratio, cement properties, and soil properties are the main factors affecting JG column performance. In this study, cement and cement mixture injections, cement particle size, fly ash, and water/binder (cement) ratio were investigated as factors affecting the performance of Jet-Grout columns formed in the laboratory at various water/cement ratios. The mixes made by mixing microfine cement, normal Portland cement (NPC), and fly ash (FA) in various water/cement ratios resulted in four different types of binders. The unconfined compressive strengths of core samples taken from formed Jet-Grout columns were examined. While fly ash had no positive impact in low water/cement ratio mixes, it did have an effect in high water/cement ratio mixes, where the water content and column diameters increased as the water/cement ratio increased.Article Investigation of Soil Dynamic Behavior by Using Equivalental Linear Analysis Method: Example of Aksaray Doğantarla(2020) Demiröz, Atila; Bozkurt, RaziyeEarthquake is a natural disaster type that deeply affects life. Although it differs according to the geotechnical properties of the ground, it can cause serious loss of life and property in some cases depending on the intensity of the earthquake. The vibration waves that occur with sudden breaks in the earth’ s crust create an earthquake. The fact that the earthquake time and severity are not known in advance, the stratified and unknown structure of the ground makes the situation more complicated. For this reason, it is necessary to determine the earthquake properties correctly and take necessary measures in advance. Therefore, it is deemed appropriate to determine the dynamic behavior of the soil in case of an earthquake, by determining it with field and laboratory studies and making the necessary analyzes. For this purpose, many software programs have been developed. In the developed software programs, the required data can be entered into the system and the dynamic behavior of the ground can be analyzed seismically. In the light of this information, for the study of Aksaray Doğantarla, Turkey Building Seismic Code also suggested the equivalent dynamic behavior of the soil using linear analysis methods were investigated. Using the soundings and seismic studies in the region, the possible behavior of the soil at the time of the earthquake was interpreted.Conference Object Microstructural Analysis on the Effect of Using Recycled Aggregate (ra) in Concrete on Its Internal Transition Zone (itz) Using Scanning Electron Microscopy (sem)(SETSCI, 2019) Kamanlı, Mehmet; Ghiloufi, Dhikra; Kekeç, Bilgehan; Demirbaş, Burak; Demiröz, Atila; Cengiz, SalihIn the past few decades, the construction industry has been marked by the emergence of Recycled Aggregate Concrete (RAC) as an environment-friendly substitute to conventional concrete to ensure sustainable development and minimize construction and demolition wastes (CDW). This paper investigates the effect of using concrete as recycled aggregate (RA) in Recycled Aggregate Concrete (RAC) on the microstructure of its Internal Transition Zone (ITZ) using Scanning Electron Microscopy (SEM). A concrete thin section using a representative sample from the demolished Ataturk stadium in Konya-Turkey that served for 68 years between 1950 and 2018 was firstly prepared. Then, a RAC thin section was prepared after size reduction, coning and quartering of the concrete from the above-mentioned source to obtain the concrete that served as RA in the new concrete mix. The SEM images of the obtained thin sections allowed conducting a microstructural analysis on the ITZ connecting the aggregates to the mortar matrix in the original concrete and to monitor its evolution in the recycled aggregate concrete marked by the development of a new ITZ between the recycled aggregates and the new mortar together with the old ITZ bonding the aggregates to the old mortar still attached to them.
