In order to study the flexural capacity of recycled concrete beams with GFRP(Glass Fiber Reinforced Polymer)bars(GFRP-RAC),the flexural tests of five recycled concrete beams with GFRP bars,one recycled concrete beams with BFRP bars and one recycled concrete beams with steel bars were carried out,and the effects of different recycled aggregate replacement rate,longitudinal reinforcement type and longitudinal reinforcement ratio on the cracking load and ultimate bearing capacity of each test beam were analyzed.The results show that the recycled aggregate replacement rate has a great influence on the cracking load,while the longitudinal reinforcement type and longitudinal reinforcement ratio have no obvious influence on the cracking load.When the recycled aggregate replacement rate increases from 0 to 50%and 100%,the cracking load of the test beam decreases by 7.9%and 17.3%,respectively.The ultimate bearing capacity is less affected by the recycled aggregate replacement rate than by longitudinal reinforcement ratio.When the longitudinal reinforcement ratio of GFRP-RAC beam increases from 0.38%to 0.6%and 1.17%,the ultimate bearing capacity increases by 17.9%and 52.5%,respectively.In addition,the flexural capacity of GFRP-RAC beams ware compared and analyzed according to the domestic and foreign codes,and the cracking load correction factor αcr was obtained by regression analysis based on the test data and related test results.The calculated values corrected for cracking loads are in good agreement with test values.
GFRP barrecycled concreteflexural capacityrecycled aggregate replacement ratelongitudinal reinforcement ratio
NETL
NSTL
万方数据
