Detailed process for welding of column reinforcement

This video is recorded on a construction jobsite. This construction video is based on welding of column reinforcement and Rebar Lap Splice Detailing.

Concrete elements retain high compression loads efficiently, when tensile loads are miserably tolerated. In order to create the design of Reinforced Concrete Structure, various reinforcing steel bars with different standard sizes and lengths are utilized.

To sustain the stability of the reinforcement and recover the restricted length of the reinforcing bars, splicing is essential. If it is required to expand the length of reinforcement bar in reinforced concrete structural member, splicing is utilized to link two reinforcement bars to disperse the force from one bar to the joining bar.

The forces are transmitted from one bar to the other via bonds in concrete. Lap welded splices of reinforcing steel bars cause eccentricity issues and apparent collapsing of the adjoining concrete because of the kinematic behaviour of the end connections. As the anti-earthquake regulations and seismic design are modified regularly, the acceptability and trustworthiness of the design and application of such splices are significantly affected.

The video will focus on a numerical simulation to evaluate the trustworthiness and behaviour of lap welded steel splices, for loads up to the yield point region of the reinforcing steel.

Various processes like lapping of bars, mechanical joint and welded joints are applied for splicing of reinforcement bars.

Video Courtesy: Dr. Chirag N. Patel