İnşaat Mühendisliği Bölümü Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1943
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Article Deprem Yalıtımlı ve Geleneksel Binalarda Tesisatlar İçin Sismik Koruma Hesabı ve Gereksinimi(2023) Şadan, Bahadırİnşaat mühendisleri, olası büyük bir deprem senaryosu için, binanın taşıyıcı elemanlarını ve içinde yaşayan insanların can güvenliğini sağlamak için tasarım yapmaktadırlar. Halbu - ki, büyük bir deprem sonrası mali kayıp tabloları incelendiğinde, mali kayıpların en büyük bölümünü yapısal olmayan elemanlardaki hasarın oluşturduğunu görebiliriz. Dışarıdan bakıldığında hasarsız gözüken, taşıyıcı elemanlarında hasar olmayan bir binanın içerisine girildiğinde, sadece kendi ağırlığını taşımak için askılanmış ve doğru sismik koruma uygulan- mamış tesisatların, tavaların ve diğer tavana asılı ekipmanların, yüksek deprem ivmesi nedeni ile hasar gördüğü ve binanın kullanılamaz hale geldiği gözlemlenebilir. Bu durum özellikle deprem sonrası hemen hizmet vermesi gereken kritik binalar için (ör. hastaneler, ulaşım ve haberleşme yapıları vb.) daha büyük önem taşımaktadır. Sağlık Bakanlığı bu bağlamda, 2013 yılında yayınladığı bir genelge ile, 1. ve 2. derece deprem bölgesindeki, 100 ve üzeri yatak kapasiteli tüm devlet hastanelerinde sismik izolatörler ile deprem yalıtımını zorunlu hale getirmiştir. Deprem yalıtımı, binaya etkiyen deprem ivmelerini dolayısı ile deprem kuvvetlerini çok büyük oranda sönümleyerek, sadece bina taşıyıcı siste- minin değil aynı zamanda diğer muhteviyatın (tesisatlar, ivmeye hassas cihazlar vb.) deprem sırasında korunmasını sağlamaktadır. Fakat bu azaltma deprem etkilerini tamamen yok et- mediği için tesisatlarda sismik koruma yapılmasına gerek olmadığı anlamına gelmemektedir. Bu bildiride, 18 Mart 2018, 30364 sayılı Resmi Gazete’de yayınlanarak, 1 Ocak 2019 tarihi itibari ile resmi olarak yürürlüğe giren Türkiye Bina Deprem Yönetmeliği’ne (TBDY) göre elektrik ve mekanik tesisatların sismik koruma hesabı tariflenmektedir. Ayrıca yine TBDY’e göre deprem yalıtımlı binalarda sismik koruma hesabı gereksinimi irdelenmektedir.Conference Object Structural Assessment of the 13th Century Great Mosque and Hospital of Divrigi: a World Heritage Listed Structure(12th International Conference on Structural Analysis of Historical Constructions (SAHC 2021), 2021) İlki, Alper; Berlucchi, Nicola; Demir, Cem; Şanver, Ali Naki; Hurata, Ali; Cömert, Mustafa; Halıcı, Ömer Faruk; Kuran, FikretThe Great Mosque and Hospital of Divrigi is located in the central eastern partof Turkey, in Divrigi, Sivas. The historical facility consists of a monumental mosque anda two-story hospital, which are adjacent to each other. The structure dates back to13th century Mengujekids period and has been listed by the UNESCO as a World Heritagesince 1985. Great Mosque and Hospital of Divrigi is particularly notable for its monumentalstone portals that are decorated with three-dimensional ornaments carved fromstone. The structural system of the monument consists of multi-leaf stone masonrywalls and stone piers that support the roof structure which consists of stone and brickarches and vaults. The structure is located about 90 km away from the North AnatolianFault Line, that has been causing several destructive earthquakes. Consequently, thestructure is prone to destructive seismic activities. In this study, after a briefintroduction on the structural system and current condition of the structure, thestructural performance of the Great Mosque and Hospital of Divrigi is investigatedthrough site observations and structural analyses. For this purpose, linear and nonlinear 3Dfinite element models of the structure are developed and the structure is examined under theeffects of vertical loads and seismic actions. In the light of the analyses results,recommendations for potential interventions are outlined for further preservation of thestructure.Book Part Citation - Scopus: 27The Modified Post-Earthquake Damage Assessment Methodology for Tcip (tcip-Dam(Springer, 2021) Cömert, Mustafa; Ilki, Alper; Halıcı, Ömer Faruk; Demir, CemPost-Earthquake damage assessment has always been one of the major challenges that both engineers and authorities face after disastrous earthquakes all around the world. Considering the number of buildings in need of inspection and the insufficient number of qualified inspectors, the availability of a thorough, quantitative and rapidly applicable damage assessment methodology is vitally important after such events. At the beginning of the new millennia, an assessment system satisfying these needs was developed for the Turkish Catastrophe Insurance Pool (TCIP, known as DASK in Turkey) to evaluate the damages in reinforced concrete (RC) and masonry structures. Since its enforcement, this assessment method has been successfully used after several earthquakes that took place in Turkey, such as 2011 Van Earthquake, 2011 Kutahya Earthquake, 2019 Istanbul Earthquake and 2020 Elazig Earthquake to decide the future of damaged structures to be either ‘repaired’ or ‘demolished’.Article Citation - WoS: 30Citation - Scopus: 45Performance of High-Damping Rubber Bearings for Seismic Isolation of Residential Buildings in Turkey(Elsevier, 2021-04-01) Murota, N.; Tuzun, C.; Mori, T.; Şadan, Bahadır; Wakishima, K.; Suzuki, S.; Sutcu, F.; Erdik, M.The applicability of high-damping rubber bearings for seismic isolation of residential buildings in Turkey is studied using numerical and experimental approaches. Seismic isolation system composed of high-damping rubber bearings is designed according to the recently updated Turkish Building Seismic Code-2018 (TBSC2018). Three model buildings of different height at assumed seismically active area are chosen from an actual building database, on which, equivalent lateral force procedure, and time history analyses are carried out. The seismic responses of the buildings are evaluated and the seismic isolation system's efficiency is confirmed. It is pointed out that the requirements in the new code in terms of the maximum allowable shear strain of elastomeric isolators are excessively conservative for those isolators with much larger capacity which is verified by sufficient test data, and as a result, designed isolator size becomes larger than necessary from a practical aspect. In order to verify the isolator design without compliance of shear strain limitation in the code, full-scale prototypes of high-damping rubber bearings are specially designed, developed and are subjected to dynamic loading test under test protocol specified in the code. The specific values of test conditions, such as compressive force, shear displacement and frequency, are developed referring several projects in Turkey. The results are comprehensively discussed and the applicability of high-damping rubber bearing for seismic isolation of residential buildings in Turkey is concluded with numerical and experimental approaches and a possible modification of TBSC2018 regarding maximum shear strain is proposed.Book The New University Model : Flipped, Adaptive, Digital and Active Learning (fadal)(FL Global Publishing, 2019) Şahin, Muhammed; Kurban, Caroline Fell; Mazur, EricThis book is the academic version of The New University Model with an added focus on Adaptive, Digital and Active Learning (FADAL) and a future perspective on higher education. You can learn about flipping a lesson or class from many educators, but only a few people in the world have experienced flipping multiple university departments or an entire university. What could you learn from spending a few hours with the authors who have deep insight into the process of starting, managing, and scaling Flipped Learning in higher education? MEF University is the first fully flipped university in the world. The 2018 graduating class included students who earned their degrees through Flipped, Adaptive, Digital and Active Learning programs in: mathematics education, guidance and psychological counselling, law, computer engineering, electronics and electrical engineering, industrial engineering, civil engineering, mechanical engineering, economics, business administration, psychology, political science and international relations, architecture, and interior design. In this book, MEF’s rector and the director of the Center for Research and Best Practices in Learning and Teaching share invaluable insights that are not available anywhere else. Whether you are a professor considering flipping your class, a dean or a department head considering expanding your Flipped Learning program, or a rector, president or provost looking for a future perspective on higher education, this book will put you on a clear and proven fast track. The book also includes the framework and set of best practices recently developed by the Academy of Active Learning Arts and Sciences (AALAS) through a cohort of 100 experienced Flipped Learning practitioners in 49 countries. The framework will help you avoid the big mistakes as you embrace and scale Flipped, Adaptive, Digital and Active Learning in higher education. “The book is a must-read for any innovative educator or higher education administrator.” -- Dr. Eric Mazur, School of Engineering and Applied Sciences and School of Education, Harvard University.Book The New University Model : Scaling Flipped Learning in Higher Education(FL Global Publishing, 2019) Şahin, Muhammed; Kurban, Caroline Fell; Mazur, EricYou can learn about flipping a lesson or class from many educators, but only a few people in the world have experienced flipping multiple university departments or an entire university. What could you learn from spending a few hours with the authors who have deep insight into the process of starting, managing and scaling Flipped Learning in higher education? MEF University is the first fully flipped university in the world. The 2018 graduating class included students who earned their degrees through Flipped Learning programs in: mathematics education, guidance and psychological counselling, law, computer engineering, electronics and electrical engineering, industrial engineering, civil engineering, mechanical engineering, economics, business administration, psychology, political science and international relations, architecture, and interior design. In this book, MEF’s rector and the director of the Center for Research and Best Practices in Learning and Teaching share invaluable insights that are not available anywhere else. Whether you are a professor considering flipping your class, a dean or a department head considering expanding your Flipped Learning program, or a rector, president or provost considering expanding your Flipped Learning program, this book will put you on a clear and proven fast track. The book also includes the framework and set of best practices recently developed by the Academy of Active Learning Arts and Sciences (AALAS) through a cohort of 100 experienced Flipped Learning practitioners in 49 countries. The framework will help you avoid the big mistakes as you embrace and scale Flipped Learning in higher education. “The book is a must-read for any innovative educator or higher-education administrator.” -- Dr. Eric Mazur, School of Engineering and Applied Sciences and School of Education, Harvard University.Article Citation - WoS: 4Citation - Scopus: 5Time - Cost Relationships for Superstructure Projects in Turkey(TMMOB İnşaat Mühendisleri Odası, 2020-03-01) Dikmen, Seyyit Ümit; Akbıyıklı, Rıfat; Sönmez, MuratThe concept of time-cost relationship in construction projects was first introduced by Bromilow. Bromilow used the data of the superstructure projects completed in Australia in the creation of the proposed time-cost model (BTC model). The aim of this study is to determine the time-cost relationship of superstructure projects in Turkey. Time and cost data of superstructure projects completed between the years of 1999-2018 was used in the study. Data was grouped primarily on the basis of the intended use of buildings (individual buildings, educational buildings, hospitals, industrial buildings and social housing), and then time-cost relationships were separately determined for each group. In addition, the effects of the parameters such as exchange rates and the number of non-working days on the time-cost relationship were investigated statistically.Article Contribution of Gravity Frames To Seismic Performance of Steel Moment Resisting Frames(2018-12-31) Zorlu, Mustafa; Şeker, Onur; Akbaş, Bülent; Shen, Jay; Boz, MehmetTraditionally, lateral stiffness and strength of the gravity frames in steel buildings are neglected in structural analysis. During the past earthquakes, such as Northridge, USA, 1994 and Kobe, Japan, 1995, unexpected failures were detected at beam-to-column connections of steel moment resisting frames (MRFs). In the aftermath of these earthquakes, extensive research has been carried out to reveal the causes of these failures. Based on the detailed observations, it is likely that the reserve capacity provided by the gravity frames prevented the highly damaged steel buildings from collapsing, since majority of the moment-resisting connections failed prematurely during the Northridge earthquake (1994). Even though the influence of gravity frames (GFs) on structural behavior can be substantial, little attention is paid to evaluate its impact on structural response. With this paper, the contribution of interior GFs in seismic performance of special moment resisting steel frames (SMRFs) is evaluated. For this purpose, 4- and 9-story SMRFs were designed in accordance with the requirements of Draft Turkish Seismic Code (2016). The frames are, then, subjected to incremental dynamic analysis. To evaluate the contribution of the interior GFs on the overall seismic performance of structural system, inelastic behavior of shear tab (simple) connections at beam-to-gravity-only columns were idealized as semi-rigid joints. A general purpose structural analysis software, ETABS, is utilized for the analyses. The results of the study are presented in terms of story drifts, base shear vs. roof displacement.Conference Object Citation - WoS: 7Citation - Scopus: 42D Modeling Temperature Development of Mass Concrete Structures at Early Age(fib. The International Federation for Structural Concrete, 2017-08-06) Yikici T.A.; Chen R.H.L.; Chen, Roger H. L.; Yikici, Tahsin AlperIn this paper, a 2D finite volume analysis methodology was used to predict temperature development within three different bridge pier caps. MATLAB® was employed to generate a program that solves the governing heat transfer equation where development of thermo-physical concrete properties was defined as a function of degree of hydration. The rate of heat generation was obtained experimentally via adiabatic calorimetry and the activation energy was determined following the ASTM C 1074 procedure to implement equivalent age concept. 2D finite volume analysis results were presented in comparison with the recorded concrete temperatures from the field. Accordingly, temperature time histories at the center and the side surface of the bridge pier caps were predicted reasonably well using the concrete mixture information and the measured concrete hydration properties. © Springer International Publishing AG 2018.Article Lessons From the Rector of the First Fully Flipped Learning University(FLR The Flipped Learning 3.0 Magazine, 2018) Şahin, MuhammedSahin: MEF Educational Institutions was founded in the 1970s by İbrahim Arıkan, an educator and businessman. In 1996, he founded MEF national and international K-12 schools in Istanbul and Izmir. In 2013, he founded MEF University. As both educator and entrepreneur, Arıkan was in a unique position to establish a university. He was aware the educational system was not well suited to the current needs of students and society and envisioned a totally new educational approach for MEF University. To find this approach, he brought me on board as founding rector. Having been rector of Istanbul Technical University from 2008 to 2012, I had a strong background in innovations in education. During our first meeting, Arıkan made it clear that if he was going to establish a university, it needed to be unique and take a different mentality to the educational needs of today’s students. I vividly remember Ibrahim emphatically declaring that if he could not make a change to higher education, he would call a halt to his aspirations for opening a university.