Moment-Curvature and Effective Section Stiffness of Reinforced Concrete Beams

Authors : Saeid FOROUGHİ, Bahadır YÜKSEL

Pages : 169-177

Doi:10.2339/politeknik.945426

View : 82 | Download : 14

Publication Date : 2023-03-27

Article Type : Research Paper

Abstract :In determining the seismic performance of reinforced concrete insert ignore into journalissuearticles values(RC); structures in national and international earthquake regulations, it is desired to use effective section stiffness of the cracked section in RC structural elements during the design phase. Although the effective section stiffness of the cracked section is not constant, it depends on parameters such as the concrete strength and reinforcement ratio. In this study, RC beam models with different concrete strength, tensile and compression reinforcement ratios were designed to investigate nonlinear moment-curvature relationships and effective stiffness coefficients. Analytically investigated parameters were calculated from TBEC insert ignore into journalissuearticles values(2018);, ACI318 insert ignore into journalissuearticles values(2014);, ASCE/SEI41 insert ignore into journalissuearticles values(2017);, Eurocode2 insert ignore into journalissuearticles values(2004); and Eurocode8 insert ignore into journalissuearticles values(2004, 2005); regulations and moment-curvature relationships. The effective section stiffness coefficient obtained from the analyses were compared with the effective section stiffness coefficient given for RC members in different regulations. The results obtained at the end were examined by comparing them according to different parameters and models. For constant concrete strength and tensile reinforcement ratio in RC beams, with increasing compression reinforcement ratio, effective stiffness coefficient values increase. In RC beams with constant compression and tensile strength ratio, effective stiffness coefficient values increase with increasing concrete strength. The compression reinforcement ratio has been proved to be effective on the maximum moment bearing capacity of the RC beams, effective flexural stiffness and effective stiffness coefficient and ductility of the sections.
Keywords : Sismik performans, etkin rijitlik, moment eğrilik, yapı elemanları, betonarme kiriş

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