STUDY OF CREEPY OF CONCRETE UNDER LONG-LASTING SMALL CYCLE SIGNIFICANT VARIABLE COMPRESSION – TENSILE AND TENSILE – COMPRESSIVE STRESSES OF DIFFERENT INTENSITIES
DOI:
https://doi.org/10.31713/budres.v0i41.017Abstract
As a resultofresearchesitisestablishedthatlong-termmolocyclicalternatingloadingofdifferentintensitycausesincreaseofdeformationsofcreepinhalf-cyclesofcompressionapproximatelytwice, andinhalf-cyclesoftensionfivetimes, incomparisonwithcorrespondingdeformationsoflongcreepundertheactionofunambiguousconstantcompressiveandtensileloading. sameintensityandlongevity
Inthiscase, theincreaseinthetotalcreepdeformationsbothintheregimesamplesof PRSC prismsandintheregimesamplesof PRSC prismsdoesnotdependonthefirstloadcycle, ieeitherthefirstcompressionhalf-cycleorthefirsttensilehalf-cycle.
Sincethecreepdeformationsofconcreteundertheactionoflow-cyclealternatingstressesdiffersignificantlyfromthecreepdeformationsundertheactionofunambiguousstaticloads, theiranalysiswasperformedonthebasisofstatisticalprocessingofcorrelationandexperimentalvalues of "pure" creepdeformationsandtotallongcreepdeformations. As a result, theparametersofcorrelationandexperimentalvalues, whichhavehighreliability, weredetermined.
Processingofexperimentaldataofotherresearchersbymethodsofmathematicalstatisticsshowedsatisfactoryconvergenceoftheirresultsandresultsofauthorsofwork. Althoughotherresearchershaveusedconcretesofothercompositions, differentlevels, loadregimesandtheirduration, butthecoefficientsofthetotalforcedeformationsofconcreteundertheactionofcycliccompressiveloadsandforcedeformationsofunambiguousconstantcompressionoftheintensityandduration almostidentical. The same can be said for the coefficients of creep deformation ratios
