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Abstract
The behaviour of fibre reinforced polymer (FRP)‐confined concrete in circular columns has been extensively studied, but much less is known about concrete in FRP‐confined square columns, in which the concrete is non‐uniformly confined and the effectiveness of confinement is much reduced. The present paper deals with the analysis of experimental results in terms of load‐carrying capacity and strains, obtained from tests on square prismatic concrete column, strengthened with external glass fibre composite. The parameters considered are the number of composite layers and the corner radius for a square shape. A total of twenty‐one prisms of size 100 × 100 × 300 mm were tested under strain control rate of loading.
Santrauka
Pluoštu armuotu polimeru sustiprintu apskritu betoniniu kolonu elgsena yra išsamiai išnagrineta. Daug mažiau žinoma apie polimero pluoštu sustiprintu kvadratiniu betoniniu kolonu elgsena. Tokiuose elementuose betono deformacijos suvaržomos nevienodai. Del to mažeja sustiprinimo efektyvumas. Straipsnyje pateikiami išoriniais stiklo pluošto lakštais sustiprintu kvadratiniu betoniniu kolonu laikomosios galios, deformaciju eksperimentiniu tyrimu rezultatai ir ju analize. Eksperimentiniuose tyrimuose nagrineta kompozitiniu pluoštu sluoksniu skaičiaus, skerspjūvio kampo spindulio itaka sustiprintu kolonu elgsenai. Iš viso išbandytos dvidešimt viena lOOxlOOx 300 mm matmenu prizmes. Bandymai atlikti kontroliuojant apkrovimo greiti pagal deformacijas.