PRACTICAL METHOD OF STRENGTHENING REINFORCED CONCRETE ELEMENTS CALCULATION
DOI:
https://doi.org/10.31713/budres.v0i37.299Abstract
Industrial and civil construction is characterized by widespread use of reinforced concrete structures, which are one of the main supporting elements of buildings and structures. Reinforced concrete bending elements (beams, slabs, frames, etc.) have been widely used in building structures in the past.
For today, taking into account earlier theoretical and experimental studies, normative documents have been issued in Ukraine for calculating reinforced concrete elements reinforced with composite materials and for calculating and designing dispersed reinforced fibrous concrete structures.
Strengthening of reinforced concrete structures is carried out only when all other possibilities of ensuring their reliable exploitation are exhausted. For today, the simultaneous strengthening of the compressed and stretched zones is not sufficiently investigated. Therefore, further research of reinforced concrete elements reinforced by modern and highly effective materials, namely steel-fiber reinforced concrete and composite materials based on carbon fibers, have an important theoretical and practical significance. The use of modern carbon-plastic materials and steel-fiber reinforced concrete is an effective way to strengthen bending reinforced concrete elements.
The article presents the theoretical bases and method of calculation of bending reinforced concrete elements according to the new design standards of reinforced concrete structures DBN V.2.-6-98: 2009 “Concrete and reinforced concrete constructions. Basic provisions” and B V.2.6-156 ISO: 2010 “Concrete and reinforced concrete construction with heavy concrete. Design rules”, which are based on the modern deformation model and fully harmonized with European standards (Eurocode 2). Reinforced concrete beams simultaneous strengthening under load research is resulted by the glued on compos as carbon fibres in the stretched area, аnd steelfiberconcrete with metallic fibеr in the compressed zones.
