Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Book Part Influence of High Sustained Axial Stresses on the Seismic Behavior of Full-Scale Substandard Reinforced Concrete Columns(CRC Press, 2025) Gundogan, S.; Demir, U.; Turan, O.T.; Ilki, A.Reinforced concrete (RC) columns are critical structural components that play a decisive role in the seismic performance of buildings. However, the combined effects of long-term sustained axial loads and seismic loading on these columns remain a pressing concern. In particular, design and construction deficiencies, coupled with material deterioration, often result in substandard RC columns experiencing long term axial stresses that far exceed typical service levels. These elevated stress conditions can lead to significant structural vulnerabilities, manifesting as collapses under seismic actions or even under gravity loads alone. Within this context, this study aims to investigate the impact of such high sustained axial stresses on the response of substandard reinforced concrete columns prior to be subjected to reversed cyclic lateral loading simulating seismic actions. For this purpose, two full-scale columns were tested under the combined actions of axial load and reversed cyclic lateral displacements. One of two columns were tested after it was exposed to a sustained axial load of 825 kN, corresponding to 70% of axial load capacity (fbh) for a duration of six months, while the other column was tested as the reference specimen right after it was subjected to same level of axial load. Comprehensive instrumentation during testing and detailed creep analysis under long-term applied axial loads were conducted to evaluate the response of the columns. The findings highlight the significant impact of long-term high axial stress on the seismic performance of substandard RC columns. © 2025 selection and editorial matter, Alphose Zingoni; individual chapters, the contributors. All rights reserved.Book Part 25 Years of FRP Research at Istanbul Technical University(CRC Press, 2025) Ilki, A.; Sari, B.; Goksu, C.; Demir, C.; Demir, U.; Töre, E.The application of fiber-reinforced polymer (FRP) composites for structural strengthening and seismic retrofitting has significantly advanced in recent decades. This study presents a com-prehensive review of FRP research conducted at Istanbul Technical University (ITU) in the last 25 years, which has closely aligned with global developments in the field. The research at ITU has focused parti-cularly on addressing the substandard characteristics prevalent in Türkiye's building stock. Investigations have spanned a wide range of specimens, from small-scale concrete prisms to full-scale three-dimensional reinforced concrete (RC) buildings. Key focus areas have included FRP applications for ductility enhancement, flexural strengthening and seismic retrofitting of structural members. Various FRP mate-rials have been examined, including aramid, glass, carbon, basalt and PET fibers. Multiple application techniques have been explored, ranging from externally bonded reinforcement to textile reinforced sprayed mortar. The findings from these extensive studies have consistently demonstrated the efficacy of FRP composites in enhancing the structural performance and seismic resilience of substandard buildings. This body of research has made significant contributions to the development of practical retrofit solutions tailored to the specific challenges posed by Türkiye's existing building stock and has broader implications for seismic risk mitigation in countries with similar construction practices. © 2025 selection and editorial matter, Alphose Zingoni; individual chapters, the contributors. All rights reserved.Book Part Algal Biofilm and Phycoremediation(CRC Press, 2024) Güneş, K.; Kaplangı, B.B.; Özkan, A.; Kucuker, M.A.Various physical and chemical methods have been extensively studied and explored for the remediation of heavy metals, pesticides, and other contaminants present in wastewater. However, the chemicals used in these methods lead to a second treatment, causing problems such as high cost and application difficulties. To overcome this problem, the bioremediation method is an acceptable pollutant removal alternative. It is used as an efficient biological agent in bioremediation studies in microalgae and bacterial strains commonly used in treatment systems. Phycoremediation refers to microalgae-based pollutant removal. In recent studies with algal bioremediation, Chlorella sp., Scenedesmus sp., Spirulina platensis, and Chlamydomonas sp. have been used mostly to remove organic and inorganic pollutants from water streams. In this section, definitions regarding algal biofilm, including its formation mechanism and applications in remediation, will be provided. Subsequently, the suspended and attached algal growth systems commonly employed for pollutant removal will be studied. Furthermore, diverse methodologies utilized for the valorization of algal biomass will be examined. © 2025 selection and editorial matter, Maulin P. Shah and Günay Yıldız Töre.Book Part Citation - Scopus: 2Comparative Mapping(CRC Press, 2024) Frary, A.; Doganlar, S.; Ratnaparkhe, M.B.In the mid 1980s, restriction fragment length polymorphism (RFLP) analysis was first applied to plants for the purposes of creating genetic linkage maps. Using the maps developed for major crop species, the genes controlling qualitative and quantitative traits could be detected and then selected for (via closely linked molecular markers) in breeding programs. Advances in DNA marker technology not only allowed the rapid generation of high-resolution plant genetic maps, but also facilitated detailed comparisons among species. When complementary molecular markers are mapped across related species, it is then possible to align the chromosomes of those species to create comparative linkage maps. In this way, genomic similarities between species are revealed so that genetic information about one species may be extended to others and evolutionary inferences drawn. © 2008, CRC Press. All rights reserved.Book Part Fermentation of Soybeans – Technology, Nutritional Properties, and Effects(CRC Press, 2022) Mukherjee,R.; Chakraborty,R.; Dutta,A.Soybean, which is a native oilseed plant of Asia, is widely used worldwide as a source of oil. However, oil is the only product that is procured from soybean seeds. A large variety of other products and by-products are also obtained from the seeds either before or after oil is extracted. Interest in the composition of soy products has exponentially grown because numerous potential anticarcinogens and other therapeutic agents have been reported to be found in soybeans and related products. Soybean seeds are grown primarily to produce oil which has a unique fatty acid profile; it predominantly contains unsaturated fatty acids, including monounsaturated fatty acids and polyunsaturated fatty acids. Linoleic acid, and to a much lesser extent, a-linolenic acid, are the most abundant fatty acids of soybean oil. Fermentation is a traditional method that has been reported to not only improve nutritional content but also decrease undesirable compounds, thereby recreating a better product with improved nutritional value. © 2022 Taylor & Francis Group, LLC.Book Part Citation - Scopus: 5Scaling Problem of the Geothermal System in Turkey(CRC Press, 2014) Doğan,I.; Demir,M.M.; Baba,A.[No abstract available]Editorial Book Part Citation - Scopus: 1Rapid Development of Geothermal Power Generation in Turkey(CRC Press, 2014) Karadaş,M.; Akkurt,G.G.[No abstract available]Book Part Exergetic and Exergoeconomic Aspects of Ground-Source (geothermal) Heat Pumps in Turkey(CRC Press, 2014) Hepbasli,A.; Kuzgunkaya,E.H.[No abstract available]Book Part Citation - Scopus: 1Design of Adaptive Structures by Kinematic Synthesis of Mechanisms(CRC Press, 2013) Akgün,Y.; Maden,F.; Korkmaz,K.Parallel to the development of material science and computer technologies, adaptive structures and smart building components have become the demand of contemporary architecture. However, in order to design adaptive systems, basic knowledge on kinematic synthesis is needed. This paper introduces the fundamental principles of the kinematic synthesis of mechanisms and expresses the potential structural uses of common mechanisms. For this purpose, main concepts of the mechanisms are introduced and types of kinematic synthesis are explored by the help of innovative examples. In this context, firstly, type synthesis methods are explained. Second step covers the path generation rules, and the final step includes the design of multi-loop and chain mechanisms. During the explanation of the aforementioned principles, innovative adaptive structures which are designed by the authors are introduced as well. These structures are all derived from common planar and spatial mechanisms such as four-bar linkages, Watt mechanisms, scissor systems, Bennett linkages and different multi-loop mechanisms. © 2013 by Taylor & Francis Group, LLC.
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