Load bearing ability testing of mechanical rebar couplers

Abstract

Different systems for mechanical rebar splicing, as a contemporary method which in certain situations may have advantage over usual rebar splicing by overlapping or welding, is presented in this paper. Relevant international standards for testing and quality confirmation of mechanical rebar splicing systems are considered. Also, laboratory testing results of Lenton couplers, performed in the Laboratory for materials at the Faculty of Civil engineering in Belgrade in order to prove the load bearing ability of these couplers, are presented. Intensive development in production and application of mechanical rebar splicing systems, the scope of research in this area, as well as the publication of international standards prescribing requirements and procedures for quality confirmation, represent a very good base for development of the corresponding technical regulation in Serbia.

U radu su prikazani različiti sistemi mehaničkog nastavljanja armature, kao savremenog postupka koji u određenim situacijama ima prednost u odnosu na klasično nastavljanje armature preklapanjem ili zavarivanjem. Razmatrani su i aktuelni standardi za ispitivanje i dokaz kvaliteta sistema za mehaničko nastavljanje armature. Takođe, prikazani su i rezultati laboratorijskog ispitivanja spojnica sistema Lenton, obavljenog u okviru Laboratorije za materijale Građevinskog fakulteta u Beogradu, u cilju provere nosivosti predmetnih spojnica. Intenzivan razvoj proizvodnje i primene mehaničkog nastavljanja armature u svetu, obim istraživanja u ovoj oblasti, kao i internacionalni standardi koji propisuju zahteve vezane za kvalitet i procedure dokaza kvaliteta, predstavljaju veoma dobru osnovu za razvoj odgovarajuće tehničke regulative u ovoj oblasti i u Srbiji.