Assessment of Locally Produced Mechanical Coupler and Traditional Reinforcement Splice System in Building Construction
No Thumbnail Available
Date
2019-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
High compression loads are well sustained by concrete elements, while tensile loads are poorly
tolerated. Therefore, reinforcing steel bars of various standard sizes and lengths are used for the
design of reinforced concrete structures. Manufacturing, fabrication, and transportation limitations
make it impossible to provide full length continuous bars in some reinforced concrete structures.
For this reason, it is often more convenient to work with shorter bar lengths, it is frequently
necessary to splice bars in the field. Lap splices cause congestion at the splice locations, sometimes
making their use impossible; rebar congestion making it difficult to concrete to pass through; the
industry has also used mechanical coupler splice generate rebar splices. There are many types of
mechanical splicing products available in the world, in Ethiopia threaded coupler use some
construction project at Addis Ababa. The objective of this research is to study the speed of
installation procedure among splice type, cost of splice type, the splice to be used, load-deflection
and crack behavior of reinforcement concrete beams under static point load configuration of
different reinforcement splice type. The methodology is experimental program, and it has been
performed to investigate the research tested in point load configuration with cube test of concrete
and tensile test of reinforcement splice bar type. Each beam was designed to include two bars in
tension, spliced at the center of the span. A total of twelve beam specimens, specimens were
grouped into four groups to investigate influences of splice type with respect to control beam, weld
splice beam, lap splice beam and mechanical coupler splice beam. Each series was involved three
beams tested to investigate the performance of reinforcement bar splice type. The findings of an
experimental investigation, cost comparison and installation for reinforcement splice type stated
under the objective with short summary. Recommendations are presented at the end.
Description
Keywords
continuous, splice, couple, bond