Ultimate strain-stress behavior and durability of reinforced concrete beams
A. A. Shkurupiy, D. N. Lazaryev, Ye. N. Lazaryeva
Poltava National Technical University named after Yuri Kondratyuk
Abstract: The article deals with analysis of methods of determination of the strainstress behavior (SSB), durability and ultimate deformation of the compressed concrete ( cu1 ε ) of reinforced concrete beams which work on a bend, on the basis of deformation models (DM) of Eurocode 2, ДБН В.2.6-98:2009 and DM with the extreme strength criterion (ESC). Application of DM in the theory of reinforced concrete is a significant step forward, as this theory uses a full set of equations of mechanics of deformed solid state (MDSS): physical equations (for concrete and reinforcement), geometrical and equilibrium equations. As a result DM allows finding more precisely the borders of reinforcement modification, strength, characteristics of SSB of reinforced concrete structures (RCS) and their elements (RCE), to take into account the character of complete diagrams of concrete and reinforcement behavior. The existing DМ, except for DM with ESC, need experimental determination of maximum deformation of the compressed concrete cu1 ε for the design of parameters of SSB in the ultimate behavior. Significantly, that cu1 ε is determined by the redistribution of stresses on the height of the heterogeneously tense compressed area of normal section of RCE in the ultimate behavior. The comparison of design of durability of reinforced concrete beams and them SSB in the ultimate behavior upon DМ indicated higher with experimental data at the different classes of concrete (up to f МПа ck cube 120 , = and anymore) and percents of reinforcement describes in this paper. It is proved that the results of design of durability and parameters of SSB in the ultimate behavior on the basis of DM with ESC more exactly coincide with experimental data as compared to DМ of Eurocode 2 and ДБН В.2.6-98:2009.
Keywords: concrete, reinforcement, durability, strain-stress behavior, reinforced concrete structure, beam, reinforced concrete element, ultimate deformation of the compressed concrete, deformation model, extreme criterion.
Pages: 15-21.
Link for citation: Shkurupiy, A. A.; Lazaryev, D. N.; Lazaryeva, Ye. N. Ultimate strain-stress behavior and durability of reinforced concrete beams. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2013. – Vol. 9, N 1. – Р. 15-21. – URL: https://donnasa.ru/publish_house/journals/spgs/2013-1/02_schkurupij_lazarev_lazareva.pdf (date of access: 18.10.2024). (in Russian)
Vol. 9, N 1 (2013)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture