COMPARATIVE ANALYSIS OF BEARING CAPACITY OF REFERENCE AND DAMAGED CONCRETE BEAMS WITH BASALTOPLASTIC REINFORCEMENT REINFORCED WITH CARBON FIBER SHEET

Authors

  • I.A Karpiuk Odessa State Academy Civil Engineering and Architecture, Odessa
  • R.V. Hlibotskyi Odessa State Academy Civil Engineering and Architecture, Odessa
  • V.M Karpiuk Odessa State Academy Civil Engineering and Architecture, Odessa
  • А.S. Tselikova Odessa State Academy Civil Engineering and Architecture, Odessa
  • А.І. Kostyuk Odessa State Academy Civil Engineering and Architecture, Odessa

DOI:

https://doi.org/10.31713/budres.v0i41.033

Abstract

Energy-efficient, environmentallyfriendlyandeconomicalconcretestructureswith non-metalliccompositereinforcementarenotonlynegativelyaffectedbytheenvironment, butalsosignificantlydamagedintheformofsignificantforcecracks, chips, potholesduringoperationandhostilities. Therefore, thestudyoftheeffectivereinforcementofthesestructuresbroughttothe ULS limitisanimportantandurgenttask.

Thearticlepresentstheresultsofstudiesofbearingcapacityofordinary(reference) concretebeamswith basalt-plastic reinforcementundertheactionof low-cyclegraduallyincreasingload, aswellasreinforcedwithcarbonfiberinthelowerstretchedzoneandatsupportsitesundersimilarload. Comparisonoftheobtainedresearchresultsconfirmedtheexpediencyandeffectivenessoftheadoptedmethodofreinforcingdamagedbeams. Their load-bearingcapacitywashigherthanthereferencebeams, onaverage, 1.35 times.

Reinforcementofdamagedreferencebeamswith FRP external fiber-reinforcedplastic (CFRP) alsosignificantlychangedthenatureofthedestructionofthetestspecimens. Ifinthereferencebeamsthefailureoccurredonlyatthesupportsectionsoninclinedsectionsduetoshearordisplacementofconcreteofthecompressedzoneabovethetopofthedangerousinclinedcrackduetoimbalanceoftheirnormalsections (ρfl>ρfb), theninreinforcedareasincreasedtotwiceandintense - thedeformedstateofnormalsectionsbecamealmostbalanced. As a resultofthedestructionofreinforcedspecimens - beamswithlarge (a/d = 3) andmedium (a/d = 2) shearspansoccurredinnormalsections. Itbeganwiththeruptureofthelowerstretchedcarbonfiberreinforcementlayer.

Foreaseofcomparison, themainparametersofbearingcapacityofreferenceandreinforcedconcretebeamswith BFRP arepresentedintheformofexperimentalandstatisticaldependences, whichcanbeusedtoassesstheinfluenceofresearchfactorsbothinparticularandininteractionwitheachother. Theperformedresearchesallowedtodevelopphysicalandcomputationalmodelsofbearingcapacityofdamaged (ULS) concretestructureswith FRP, reinforcedwithexternal fiber-reinforcedplastics.

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Published

2023-11-28

Issue

No. 41 (2022)

Section

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