AGING OF SOME GFRP-CONCRETE JOINTS UNDER EXTERNAL PRESSURE
Compressive stresses created by lateral external pressure on laminates are an important factor on success of the use of mechanical anchorage of externally bonded reinforcement(EBR).A program of double shear tests with imposed normal stresses on GFRP plates bonded to a concrete surface and a bond-slip model are described.Results generated numerically are summarized and used as reference values against those obtained after accelerated aging by freeze-thaw cycles,and temperature cycles of the same amplitude but range closer to the glass vitreous temperature.Numerical modelling showed that the bonded length is fully stressed prior to failure.Increasing lateral pressure led to a larger maximum bond stress and strength at the interface.Cohesion,fracture energy and internal friction angle changes are calculated and used to analyze the effects of the aforementioned cycles on the expected behaviour of the GFRP-concrete joints,namely at the interface.
GFRP concrete strengthening interfacial stresses aging lateral pressure
Manuel A G Silva Hugo Biscaia Carlos Chastre Rodrigues
Faculdade de Ciências e Tecnologia,Universidade Nova de Lisboa,2829516 Caparica,Portugal FSE,UNIDEMI,Faculdade de Ciências e Tecnologia,Universidade Nova de Lisboa,Portugal ICIST,CERIS,Faculdade de Ciências e Tecnologia,Universidade Nova de Lisboa,Portugal
国际会议
新加坡
英文
1-5
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）