New design concepts for strengthening of continuous reinforced-concrete beams

Abstract

The present article is concerned with basic methods of reinforcement of continuous reinforced-concrete beam constructions. The main disadvantages and difficulties in strengthening such load carrying structures have been identified in this academic paper. There has been offered the method of reinforcement of continuous reinforced-concrete beam constructions. Besides, the authors have established the procedure of designing effective continuous reinforced-concrete beams in case of the reinforcement. The basic principle of enforcement of continuous reinforced-concrete beams is proposed in this exploratory development. This principle lies in the fact that it is necessary to find the desired span stiffness of continuous reinforced-concrete beam constructions, which would provide sufficient reinforcement in the reference section of the beams. In this case, there is no need to strengthen reference sections, which is practically impossible to do in most instances without dismantlement of the existing concrete floor slabs. For reinforcement systems designing, it is proposed to use the method of design resistance of reinforced concrete, which uses theoretically, and experimentally confirmed prerequisites and hypotheses. The calculations are made by the iteration method. There has been provided a calculation example of enforcement of continuous reinforced-concrete beam constructions using the proposed method.

Influence of the percentage of reinforcement by unstressed rebar on the deformability of pre-stressed RC beams

“…Reinforced concrete unstressed and prestressed constructions are widely used in construction and studied by scientists (Azizov et al, 2019;Karpiuk et al, 2019;Kovalchuk et al, 2021). Research is also performed using mathematical models and approximate engineering calculations (Blikharskyy et al, 2021;Kotes et al, 2020;Kos et al, 2019;Pavlikov et al, 2019).…”

Experimental Results of Damaged Rc Beams

“…Reinforced concrete structures are among the most common all over the world (Azizov et al, 2019, Algburi et al, 2019, Pavlikov et al, 2018, Kramarchuk et al, 2020. However, under the influence of time, the environment, low-quality materials, their performance properties were determinate.…”

Stress-strain state of damaged reinforced concrete bended elements at operational load level

“…Taking into consideration the prevalence of reinforced concrete structures in construction, the study of their load-bearing capacity changes during operation is the topical issue (Azizov et al, 2019;Karpiuk et al, 2019;Vatulia, 2018). The main issue in this area is the determination of bearing capacity, taking into account the damages` occurrence (Blikharskyy et al, 2021;Klymenko et al, 2020;Kotes et al, 2018).…”