The influence of simultaneous action of the aggressive environment and loading on strength of RC beams

Abstract

The article is devoted to an experimental research of the strength of reinforced concrete beams, and its dependence on a simultaneous influence of a corrosion environment and a loading factor. The tests have been carried out upon reinforced concrete specimens of 2100×200×100 mm size, with a regular reinforcement. The beams are of a span equaling to 1,9m with different reinforcing ratio of beams. The acid environment, namely 10 % H2SO4, was taken as a model of an aggressive environment. Reinforced concrete beams have been tested with and without the co-action of the aggressive environment and loading factor. Beams, which underwent a simultaneous action of the corrosive environment and loading, were loaded to a level 0.7 of its load-carrying capacity. The load-carrying capacity in aggressive environment in all the beams of all the series was achieved in 46-60 days. The influence of the simultaneous action of the aggressive environment and loading on the strength of reinforced-concrete beams has been described in the following work. It is necessary to note that the design code of Ukraine does not allow determining load carrying capacity of the beams affected by corrosion with simultaneous influence of loading with adequate accuracy. The analysis of experimental data has been done and the main directions of the design code's correction have been formulated.

Comparison Crack Resistance of RC Beams with and without Transverse Reinforcement after Shear Testing

“…During long-term operation, buildings and constructions were gotten difference type of damages [Selejdak J. et al 2018. ] and defects [Orešković M. et al 2018].…”

Development of the procedure for the estimation of reliability of reinforced concrete beams, strengthened by building up the stretched reinforcing bars under load

“…To date, there is a number of scientific studies carried out on issues of assessment of reliability of the non-strengthened structures [17,18] or analysis of deflected mode of damaged [19][20][21] reinforced concrete structures of various types. Despite the novelty of the obtained results, authors of works [17,18] took into consideration strength variable parameters of the reserve of bearing capacity of structures only when calculating the reliability of columns and beams.…”

“…Despite the novelty of the obtained results, authors of works [17,18] took into consideration strength variable parameters of the reserve of bearing capacity of structures only when calculating the reliability of columns and beams. In turn, papers [19][20][21] studied the actual deflected mode of damaged pillars, beams, and pipeswithout assessment of reliability of elements under consideration. It is possible to use the obtained results in the studies for determination of the actual bearing capacity of structures.…”

Bearing capacity of RC beams reinforced with high strength rebars and steel plate

“…The concentrated location of band reinforcement on the external facets of the structural intersections allows to reduce their mass, decrease the size of the cross-section compared to the reinforced concrete or to reduce the use of steel at the same height of the cross-section. However, there is a danger of corrosive effects [5], therefore, it is necessary to provide for a qualitative protection against the influence of the environment [6,7].…”