Browsing by Author "Harirchian, Ehsan"

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Citation - WoS: 13
Citation - Scopus: 13
Performance-Based Assessment of Rc Building With Short Columns Due To the Different Design Principles
(MDPI, 2023) Işık, Ercan; Ulutaş, Hakan; Harirchian, Ehsan; Avcil, Fatih; Aksoylu, Ceyhun; Arslan, Musa Hakan
Many factors affect the earthquake vulnerability of reinforced concrete (RC) structures, constituting a large part of the existing building stock. Short column in RC structures is one of the reasons for earthquake damage. Significant damages may occur due to brittle fractures in structural elements when the shear resistances are exceeded under the effect of high shear stress in short columns formed due to architectural and topographic reasons. This study created structural models for three situations: the hill slope effect, band-type window and mezzanine floor, which may cause short column formation. The structural analyses by SAP2000 were compared with the reference building model with no short columns. Structural analyses were performed separately according to strength-based and deformation-based design approaches in the updated Turkiye Building Earthquake Code (TBEC-2018). Short column formation; the effects on soft-storey irregularity, the relative storey drifts, column shear force, plastic rotation in columns, roof displacement, base shear force and column damage levels were investigated. As a result of the analysis, it was determined that the relative drifts from the first floor of the building decreased significantly due to the band-type window and slope effect, which caused the second storey to fall into the soft-storey status. In addition, short-column formation caused a significant increase in both plastic rotation demand and shear force in short columns.
Citation - WoS: 69
Citation - Scopus: 82
Structural Damages in Masonry Buildings in Adiyaman During the Kahramanmaras, (turkiye) Earthquakes (mw 7.7 and Mw 7.6) on 06 February 2023
(Pergamon-Elsevier Science Ltd, 2023) Isika, Ercan; Avcil, Fatih; Buyuksarac, Aydin; Izol, Rabia; Arslan, Musa Hakan; Aksoylu, Ceyhun; Harirchian, Ehsan
The 06 February 2023 Kahramanmaras, Earthquakes, which were the disaster of the century for Turkiye and in which more than 50,000 people lost their lives, caused many buildings to collapse or receive significant structural damages. Adiyaman is one of the provinces that caused the most destruction by earthquakes affecting 11 different provinces, which occupy approximately 14% of the country's surface area. The masonry buildings have been severely damaged by earthquakes, which constitute a significant part of the building stock in the province's rural areas. In this study, the region's seismicity and the spectral acceleration values of the last earthquakes were analyzed, and the distribution of building damages was given statistically. The main goal of this study is to determine the collapse and failure mechanisms of existing unreinforced masonry buildings in detail. The study also includes reconstruction strategies or retrofitting procedures to prevent damage to masonry structures in the region. Non-compliance with seismic design codes is the leading cause of damage in masonry buildings constructed by local craftsmen using low-strength wall and joint building materials. The usage of heavy earthen roofs, insufficient wall-wall, and wall-roof connections, lack of vertical and horizontal beams, poor workmanship, and insufficient interlocking between layers are the causes of structural damages observed in the field. At the end of the study, critical clauses in the current earthquake code were emphasized, and the precautions to be taken for existing and new design masonry buildings were also mentioned.