Design and Analyze the performance of Mechanical Rebar Coupler in the concrete structure Alternative to Lap Splices

Abstract

In construction practices, the buildings of concrete structure have focused on the use of steel reinforcement for transfer of tension and shear forces. In general construction purposes two types of steel are used including the mild and deformed steel bars. The mild steel bars which are used in reinforced cement concrete works are plain in surface and round in cross-section. Lap splicing is the conventional method of connecting steel reinforcement bars. Lapping is the method in that reinforcement bar is connected with each other. Purpose of lapping is to give continuity of reinforced structure like beam, column, slab etc. The splicing of bars by lapping may also have various imperfections such as that the low quality weld, inadequate length of lap and increase in the construction cost. But the lapping may also reduce the time and increase the structural reliability of the concrete structure. The practice of the use of coupler in the construction industry may overcome the problems of the construction time and simplify the design and construction of reinforced concrete and reduce the amount of reinforcement required. The present paper is to analyze the design and the performance of the coupler in the concrete structure. Couplers not only provide strength to joints but also prove as an economic mean for connections of two bars. The objective of this research study is that to investigate the new design of the coupler which reduces the consumption of reinforcement steel and construction time in concrete structure.