Person: SAĞIROĞLU, SERKAN
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SAĞIROĞLU
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SERKAN
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Publication Experimental and numerical investigation of the bond behavior of smooth and sand-coated rebar in concrete by flexural bond test method(Gazi Univ, 2023-01-29) Sakçalı, Gökhan Barış; Yüksel, İsa; Sağıroğlu, Serkan; SAĞIROĞLU, SERKAN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/İnşaat Mühendisliği Bölümü.; 0000-0002-5176-9990Reinforced concrete behavior can be exhibited by the acting of steel rebar and concrete together. This situation produces full adherence acceptance of the steel rebars and concrete interface for use in simple empirical calculations. However, the bond-slip model may be important in more realistic and comprehensive models. This situation causes other factors that create adherence to come to the fore, due to the lack of mechanical clamping in smooth surfaced bars. For this reason, it is important to define the bond-slip models accurately to the numerical models when constructing the numerical model of this type of rebars. In this study, two flexural bond experimental test specimens reinforced with smooth surface steel bar and reinforced with sand coated steel bar were prepared. These two samples were tested comparatively in terms of load bearing capacity, vertical displacement capacity, slip and collapse mechanism. As a result of the investigations, boundary values have been proposed for the BPE model, which is also recommended by the CEB-FIP (2010) model, to be used in both smooth surface and sand-coated surface. In addition to these, numerical models with different embedment lengths were created in the light of experiments and proposed BPE models. It was concluded that the embedment length significantly affects the maximum load capacity in the numerical models created.Publication Seismicity of east anatolian of Turkey and failures of infill walls induced by major earthquakes(World Scientific Publ Co Pte Ltd, 2021-03-13) Doğangün, Adem; Yön, Burak; Onat, Onur; Emin Öncü, Mehmet; Sağıroğlu, Serkan; DOĞANGÜN, ADEM; SAĞIROĞLU, SERKAN; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/İnşaat Mühendisliği Bölümü; 0000-0002-1867-7103; AAH-8862-2021; AAR-6126-2020There are three major fault zones in Turkey scattered around the country known as East Anatolian Fault (EAF), North Anatolian Fault (NAF) and Anatolian-Aegean Subduction Zone (AASZ). Last two decades, EAF has been rather quiescent compared with NAF. However, this quiescence was broken in the beginning of the millennium. The strong shaking was started in 2003 with Bingol earthquake (Mw = 6.3) and the last earthquake on the EAF is the Sivrice-Elazig (Mw = 6.8) on January 24, 2020. Strong seismicity of these faults damaged the structures severely and caused death of the habitants. This study aims to present, seismotectonic of the region, general characteristics of the earthquakes and more specifically to report structural damage of infill walls of the structure's damages caused by these earthquakes. Damage evaluation and identification of the observed infill wall damages due to 2003 Bingol, 2011 Van earthquakes and January 24, 2020 Sivrice-Elazig earthquake occurred Turkey's Eastern region, were presented, and possible solutions were suggested. Moreover, the effects of the infill walls on the behavior of structures under static and dynamic load cases are discussed that experienced in these earthquakes. Damages are classified according to formations such as in-plane or out-of-plane, evaluations and the results obtained from the discussions are presented for each category.Publication Experimental setup for beams with adjustable rotational stiffness: An educational perspective(Wiley, 2021-11-17) Türker, Hakan Tacattin; Sağıroğlu, Serkan; Deliktaş, Babür; TÜRKER, HAKAN TACATTİN; SAĞIROĞLU, SERKAN; DELİKTAŞ, BABÜR; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/İnşaat Mühendisliği Bölümü,; 0000-0001-5820-0257; 0000-0002-4035-4642; A-4984-2018; AAH-8687-2021; AAH-8862-2021In structural analysis, the rotations of beams' supports are considered either completely fixed or completely free. Therefore, supports are idealized as fixed, pinned (hinged), or roller. In real structures, regarding rotation, the support behavior is neither fully rigid nor completely free and shows a semi-rigid behavior in most cases. In this study, an educational test setup was created for a beam with semi-rigid supports to examine the effect of semi-rigid support on structural behavior. In this experimental setup, support conditions with different rotational stiffness can be obtained from pinned support to fixed support, which can be easily changed between the pinned and the fixed support. The physical equivalent of the rotational stiffness concept is shown in an easy and understandable way with the theoretical equations. A simulation tool based on the derived analytical equation is also developed using Mathematica Software. The simulation tool provides the users with a way to visualize the deformation of the system. The results of beam tests with different support conditions were compared with the results of the simulation, and the effects of semi-rigid support on the beam behavior were shown. The results revealed that the semi-rigid supported beam assembly created can also be used to examine the behavior of frame beams under vertical load. These simple novel experimental setup and simulation tools provided are convenient and useful approaches to demonstrate the structural concepts, including the semi-rigid support and behavior of beams in a frame structure.