Bond behavior of the reinforcement bar in glass fiber-reinforced polymer connector

This paper presents the bond stress - slip behavior of a newly developed grouted splice connection fabricated by glass fiber-reinforced polymer (GFRP). A total of twenty seven specimens were tested under increasing axial tension load. Results from the test specimens were adapted to model a bond stress - slip law to be compared with the requirements provided by design codes and provisions. The results show that by reducing mid-length diameter, higher bond strength and load capacity are generated in the tapered splice sleeves.Original Abstract: U ovom se radu prikazuje ispitivanje prianjajna i proklizavanja armaturne sipke u novorazvijenoj injektiranoj spojnici sa staklenim vlaknima (eng. glass fiber-reinforced polymer - GFRP). Ukupno dvadeset sedam uzoraka ispitano je postupnim povecavanjem osnog vlacnog opterecenja. Rezultati dobiveni ispitivanjem uzoraka usvojeni su za modeliranje ovisnosti naprezanje prianjanja - proklizavanje, sto je usporedeno sa zahtjevima iz normi i odredbi. Rezultati pokazuju da se u konusnim spojnicama razvija veca cvrstoca prianjanja i otpornost na opterecenje usporedo sa smanjenjem promjera u srednjem dijelu.