AN EXPERIMENTAL STUDY ON JOINT STRENGTH OF SPLICED BARS USING SPIRAL SHEATHS FOR PRECAST CONCRETE STRUCTURES

Abstract

An experimental investigation was carried out to study the joint strength of lapping splices using spiral sheaths for precast concrete members. Two series of pullout tests were carried out. The influence of the height of sheath lug, thickness of cover concrete, lateral reinforcement ratio, lapping length, and loading history on the joint strength of the lapping joints in the first series as well as the influence of the lapping splice type, position of bar inside the sheath and the number of lapping bars on the joint strength hi the second series were investigated and discussed using the existing strength equations for lapping splices.