Mechanical rebar splicing

Abstract

Different mechanical rebar splicing systems are presented, and design situations where mechanical splicing has advantage over reinforcement splicing by overlapping and welding are defined in this paper. New international standards for testing and proof of systems for mechanical rebar splicing quality are considered. Mechanical splicing system for rebar and bolt connection, usable in steel and reinforced concrete structural elements connections, is presented in this paper. There are only few examples of mechanical rebar splicing in our country. The most significant one - the pylon and beam connection at Ada Bridge in Belgrade is presented in the paper. Intensive development of production and use of mechanical rebar splicing systems, research in this area, as well as the publication of international standards prescribing requirements for quality and procedures for proof of quality, represent very good base for development of the corresponding technical norms in Serbia. The legislation in this area would quicken proof of quality procedures, attest and approval issuing for individual products, leading to wider use of this system in all situations where it is in advantage over the classical reinforcement splicing.

U radu su prikazani različiti sistemi mehaničkog nastavljanja armature i definisane neke od situacija kada mehaničko nastavljanje ima prednost u odnosu na nastavljanje armature preklapanjem i zavarivanjem. Razmatrani su novi internacionalni standardi za ispitivanje i dokaz kvaliteta sistema za mehaničko nastavljanje armature. U radu je prikazan i sistem mehaničkih spojnica za povezivanje zavrtnja i armaturnog ankera, koji se može koristiti za vezu čeličnog i armiranobetonskog elementa. Malobrojni su primeri primene mehaničkog nastavljanja armature u našoj zemlji. Jedan od značajnijih - veza pilona i grede Mosta na Adi u Beogradu - prikazan je u radu. Intenzivan razvoj proizvodnje i primene mehaničkog nastavljanja armature u svetu, istraživanja u ovoj oblasti, kao i internacionalni standardi koji propisuju zahteve u vezi s kvalitetom i procedurom dokaza kvaliteta, predstavljaju osnovu za razvoj odgovarajuće tehničke regulative u ovoj oblasti i u Srbiji, čime bi se proširila primena ovih sistema u svim situacijama kada oni predstavljaju bolje rešenje u odnosu na klasične načine nastavljanja armature. .