İnşaat Mühendisliği Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1943

Browse

Now showing 1 - 20 of 21

Comparison of the Observed and Numerical Performance of a Seismic Isolated Hospital
(International Association for Earthquake Engineering, 2024) Şadan, B.; Sahin, B.; Tüzün, C.; Demircioglu-Tumsa, M.B.; Erdik, M.
The southeastern region of Turkiye was struck by powerful earthquakes on February 6, 2023, with magnitudes measuring M7.7 and M7.6. These earthquakes resulted in significant damage, destruction, and loss of life, affecting both TÃ¼rkiye and extending into northern Syria. Among the approximately 100 isolated buildings in Turkiye, 11 isolated hospitals were located in the impacted region. This paper presents a comprehensive assessment of the seismic performance of the seismically isolated Osmaniye State Hospital during the Kahramanmaras earthquakes. The evaluation comprises site observations and numerical analysis utilizing ground motion records obtained from the nearest accelerometers. Site observations involved monitoring the movements of the isolators located at the moats around the perimeter of the hospital. Using a borescope allowed for detailed internal inspection of the isolation bearings, facilitating close-up examination of the isolators and enabling the identification of movement scuff marks on the sliding surfaces. These observations were used to estimate the maximum isolation bearing movement and determine the residual displacement offset of the bearings. The observed displacements of the isolation system were compared with the design values to assess the performance of the seismically isolated structure. Discrepancies between the observed and designed displacements provide valuable insights into the actual behavior of the isolation system. A nonlinear time history analysis was conducted using ground motion records obtained from the nearest accelerometers to further analyze the seismic response. This numerical analysis allowed for the simulation of earthquake excitations and the evaluation of the dynamic behavior of the seismically isolated Osmaniye State Hospital. The combination of site observations and numerical analysis yielded important findings regarding the seismic performance of the seismically isolated Osmaniye State Hospital during the Kahramanmaras earthquakes. The comparison between observed and design displacements provided insights into the efficacy of the isolation system, while the numerical analysis further validated the structural response. These findings contribute to improving the design and implementation of seismically isolated structures. © 2024, International Association for Earthquake Engineering. All rights reserved.
Creating the Flipped Educators of the Future: Leading by Example in the Faculty of Education
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Cultural Aspects Inherent in Flipped Learning
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Citation - WoS: 1
Differentiating Flipped Learning Approaches for the Diverse Needs of the Faculty of Economics, Administrative, and Social Sciences
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Disaster Life Cycle in Turkey: Planning, Policy and Regulation Changes Chapter 14
(2016) Ural, Derin Nur
...
Engaging Students in a Flipped Language Learning Environment: Stories From the English Language Preparatory Program
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Fipped Learning Through the Eyes of the Students: Tales and Anecdotes
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Flipped Leadership: Transparency, Vision, Accountability, and Resources
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
As a founding rector of a new institution establishing itself as a fully Flipped university, both the university and I found ourselves in a unique position. Instead of a challenging, change-management process whereby buy in was needed from each stakeholder, all the staff, instructors, and students that started at MEF had come knowing that the education would be Flipped and had agreed to be a part of this approach. From a leadership point of view, this was indeed a privileged position to be in. However, it does not mean that there were not some teething problems along the way. Three main issues arose during the first year including; instructors’ expectations and the clarity of the MEF vision; issues related to the physical infrastructure; as well as questions about assessment.
Flipped Learning Theory, Policies, and Practices
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Flipping Language, Literature, and Digital Literacies: Stories From the School of Foreign Languages
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
From Current Practice To Future Practice: Making the Decision To Flip
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
How the Faculty of Engineering Is Developing Its Flipped Approach
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Citation - WoS: 10
Citation - Scopus: 12
Implications of Site Specific Response Analysis
(Springer, 2018) Tönük, Gökçe; Kurtuluş, Aslı; Ansal, Atilla
Definition of design earthquake characteristics, more specifically uniform hazard acceleration response spectrum, on the ground surface is the primary component for performance based design of structures and assessment of seismic vulnerabilities in urban environments. The adopted approach for this purpose requires a probabilistic local seismic hazard assessment, definition of representative site profiles down to the engineering bedrock, and 1D or 2D quivalent or nonlinear, total or effective stress site response analyses depending on the complexity and importance of the structures to be built. Thus, a site-specific response analysis starts with the probabilistic estimation of regional seismicity and earthquake source characteristics, soil stratification, engineering properties of encountered soil layers in the soil profile. The local seismic hazard analysis would yield probabilistic uniform hazard acceleration response spectrum on the bedrock outcrop. Thus, site specific response analyses also need to produce a probabilistic uniform hazard acceleration response spectrum on the ground surface. A general review will be presented based on the previous studies conducted by the author and his co-workers in comparison to major observations and methodologies to demonstrate the implications of site-specific response analysis.
Japanese and Turkish Joint Detailed Survey of RC Buildings Damaged by the 2023 Turkey Earthquake
(International Association for Earthquake Engineering, 2024) Tajiri, S.; Yazgan, U.; Maeda, M.; Liu, H.; Shegay, A.; Monical, J.; Andirir, G.
The Architectural Institute of Japan formed an investigation team to survey the damage to buildings damaged by the February 2023 Turkey earthquakes. The investigation team was dispatched to the affected area from March 28 to April 4, 2023 and conducted field surveys jointly with a Turkish expert group. As part of this investigation, the authors conducted detailed surveys of damaged reinforced concrete buildings. The survey area covers five provinces where extensive building damage was confirmed: Gaziantep, Hatay, Kahramanmaras, Adiyaman, and Malatya. The buildings surveyed were those that are useful for comparative analysis, and ones that allowed for relative ease of an on-site inspection. As a result, a total of 25 buildings were investigated, many of which were constructed after 2000, and the damage level ranged from slightly to severely damaged. In each building, the arrangement, dimensions, and damage grades of columns and walls on the floors that suffered the most damage were recorded, and their damage level was evaluated based on the Japanese and the Turkish post-earthquake damage assessment guidelines. In this paper, an overview of the results of this survey is reported. Based on the survey results, we report the results of an analysis of the structural features and seismic performance of the surveyed Turkish buildings compared to typical Japanese buildings. In addition, the causes of commonly observed damage characteristics in the surveyed buildings and the damage level determined by the Japanese and Turkish guidelines are discussed. © 2024, International Association for Earthquake Engineering. All rights reserved.
Kocaeli 1999 Earthquake, Lessons Learned, Encyclopedia of Earthquake Engineering
(2015) Ural, Derin Nur
...
Milestones for Success
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Modifications on Seismic Damage Assessment System of TCIP Based on Reparability
(International Association for Earthquake Engineering, 2021) Ilki, A.; Halici, O.F.; Kupcu, E.; Cömert, M.; Demir, C.
Evaluating the damage state of buildings has always been one of the major challenges that both engineers and authorities face after catastrophic earthquakes in seismic regions. After such events, considering the number of buildings in need of inspection and the insufficient number of qualified inspectors, the availability of a thorough but rapidly applicable damage assessment method is vitally important. An assessment system serving this purpose was developed for the Turkish Catastrophe Insurance Pool (TCIP, known as DASK in Turkey) at the beginning of the new millennia to evaluate the damages in reinforced concrete (RC) and masonry structures. The assessment system assigns a damage state (related with a damage modifier for the capacity loss) to each vertical structural member (columns and shear walls) based on the observed residual damages, such as crack width, concrete crushing, cover spalling and buckling of reinforcement. Beam damages are also taken into account in a similar way. After that, the weighted damage percentage (WDP) is calculated by taking into account the damage state and the cross-sectional area of each vertical member and the number of heavily damaged horizontal members. Since its development, this assessment method has been used by TCIP to decide the indemnities (and somehow future) of damaged structures to be either ‘repaired’ (partial indemnity) or ‘demolished’ (full indemnity) after earthquakes that took place in Turkey. In recent years, the number of scientific studies in regard to the concept of reparability of damaged structures, which is a determining parameter in buildings’ future decisions after seismic events, is increased. Consequently, TCIP initiated a research project to adjust the damage assessment method with the conclusions of up-to-date state-of-the-art scientific research. This paper presents the followed methodology and brief results of different phases of the project. In order to propose modifications for the current method, firstly, an experimental database was established focusing on the performance of damaged structural members. The database was used to validate/revise the member damage modifier parameters. Secondly, in order to define a reparability limit in terms of the building WDP value, a literature survey investigating the fundamental mechanical characteristics (such as stiffness, strength and ductility) that can be used to define the seismic behavior of damaged, and damaged-and-repaired structural members was performed. These mechanical characteristics were then used in a series of nonlinear structural analyses on typical buildings representing the common typologies of buildings in Turkey. The analyses covered the undamaged, damaged and damaged-and-repaired cases in order to determine the damage state/level where the cost of the repair applications become unfeasible or the seismic performance of the repaired structure deviates considerably from that of its undamaged state. Finally, by comparing the seismic performances of undamaged, and damaged-and-repaired cases together with the repair costs, new threshold values were proposed for WDP for different damage levels (and indemnity decisions). © The 17th World Conference on Earthquake Engineering.
Numerical Analysis of Buildings in Golbasi During the 2023 Turkey-Syria Earthquake
(International Association for Earthquake Engineering, 2024) Tobita, T.; Kunisawa, M.; Sendir Torisu, S.; Kiyota, T.; Tönük, G.; Çinicioğlu, O.; Shiga, M.
On February 6, 2023, earthquakes of Mw 7.8 and Mw 7.5 occurred in south-eastern Turkey. In Golbasi, located on the East Anatolian Fault, severe damages such as building subsidence and tilting due to liquefaction were observed. In this study, settlement and tilting behavior due to liquefaction of relatively large structures in Golbasi, when adjacent to each other, were reproduced using effective stress analysis. The research results demonstrates that the differential subsidence behavior of adjacent buildings can be replicated. Furthermore, the interference of stresses within the soil beneath adjacent structures resulted in behaviors such as inward collapsing or conversely an outward leaning differential subsidence. This study also discusses the subsidence trends associated with varying distances between structures and varying in the embedment depth of shallow foundations. © 2024, International Association for Earthquake Engineering. All rights reserved.
Citation - WoS: 1
Organizational Design and Transformation
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…
Supporting Flipped Learning: Digital Pedagogy, Training, and Resources
(Emerald Group Publishing Ltd., 2016) Kurban, Caroline Fell; Şahin, Muhammed
…

Browse

Browsing İnşaat Mühendisliği Bölümü Koleksiyonu by Publication Category "Kitap Bölümü - Uluslararası"