FRP STRENGTHING BASED ON STRUT-AND-TIE MODELLING
Corbels,deep beams,beams with openings and the like are structural members comprising discontinuous regions for which conventional flexural theory does not apply.A rational approach based on strut-and-tie models(STMs)is appropriate for the strengthening of such members using fibre-reinforced polymer(FRP)systems.To verify the approach,the ultimate load behavior of reinforced concrete corbels,strengthened with epoxy bonded(EB)carbon FRP sheets and near surface mounted(NSM)carbon FRP rods,were experimentally investigated.Test variables included shear span to depth ratio,concrete strength,and main reinforcement ratio.In total,fourteen reinforced concrete corbel specimens,without hoop reinforcement,were tested to failure.Test results revealed that the loss in ultimate load-carrying capacity of RC corbels due to low concrete strength or low reinforcement ratio could be restored by FRP strengthening systems based on strut-and-tie modelling.For the same FRP reinforcement index,a combination of EB-FRP sheets and NSM-CFRP rods was more effective than using EB-FRP sheets alone.
corbels fibre-reinforced polymer strengthening strut-and-tie modelling
Kiang Hwee Tan Yujie Zhao
Department of Civil & Environmental Engineering,National University of Singapore,Block E1A,1 Engineering Drive 2,＃07-03,Singapore 117576
国际会议
新加坡
英文
1-4
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）