Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Book Part Investigation of Stone Masonry Construction Techniques and Material Properties in Hatay and Osmaniye After the 2023 Turkey Earthquake Sequence(International Association for Earthquake Engineering, 2024) Bozyigit, B.; Ozdemir, A.; Dönmez, K.; Dalgic, K.D.; Durgut, E.; Yesilyurt, C.; Acikgoz, S.The eleven Turkish provinces affected by the 2023 Turkey earthquake sequence featured historic cities which are home to numerous stone masonry structures. Scientific evaluations of the earthquake response of these structures requires knowledge of the construction techniques as well as the mechanical properties of the constituent masonry materials (stone and mortar). However, limited research has been conducted on these aspects to date. To address this research gap, a post-earthquake field study was conducted on monumental structures located in two of the affected provinces (Hatay and Osmaniye). The paper first provides a survey of damage observations from the field; these highlight the significant role of masonry disaggregation in collapse mechanisms. To understand the reasons for disaggregation failures, construction techniques are investigated systematically using the Masonry Quality Index (MQI). The use of Ultrasonic Pulse Velocity, Schmidt Rebound Hammer and Mortar Penetrometer devices to quantify mechanical properties of stone and mortar is then presented. Examples are provided to demonstrate how the construction technique and material property data informs our understanding of damage mechanisms. © 2024, International Association for Earthquake Engineering. All rights reserved.Conference Object Strengthening of Reinforced Concrete Columns Using Recycled Polyethylene Terephthalate Fibers: A Preliminary Numerical Study(fib. The International Federation for Structural Concrete, 2025) Dalgic, K.D.; Gozun, U.; Simsek, B.; Sencar, I.; Ispir, M.; Ilki, A.Strengthening of reinforced concrete (RC) columns, which have inadequate capacities of deformation and axial/lateral load, using carbon fiber reinforced polymers (CFRP) has become widespread. However, concerns about cost, energy sustainability and environmental impact have led to increased interest in alternative fibers, such as recycled polyethylene terephthalate (PET) fibers, instead of high-tech, carbon-intensive materials. This study presents preliminary numerical analyses on the use of PET fibers recycled from tire industry waste in Türkiye to strengthen substandard RC columns. The numerical analyses of the column models were performed under axial and horizontal loads. The results show that even small amounts of PET-FRP fibers can significantly improve both lateral load and deformation capacities of RC column, indicating the development of strengthening strategies for upcoming column tests. Based on the results of numerical studies, an experimental program for quasistatic testing of substandard RC columns has been planned. © 2025 Elsevier B.V., All rights reserved.