Anchorage and lap splicing detailing of slabs, columns. Behaviour of contact and noncontact lap compression. This popular publication is the definitive source for information on. Abstract the key factors that govern development anchorage and splice performance of reinforcing bars in tension are described. An experimental study of welded splices of reinforcing bars.
The results indicate that strutandtie modeling can be successfully applied to understand the behavior of noncontact lap splices and is necessary in determining the anchorage length of lapped bars. The effects of the presence of lap splices, splice length 60 bar diameters. In the presence of a simulated crack in the plane of the reinforcing bars, the three specimens with lapspliced no. Engineering, earthquake engineering research institute, anchorage, ak, 2014. Includes extensive tables of development and lap splice lengths for grade 60 reinforcing bars with 3,000 to 10,000 psi concrete compressive strengths, and development and lap splice tables for epoxycoated reinforcing bars, including development. Mechanical properties for splices of welded reinforcing steel bars article pdf available. Recommendations for mechanical splices of reinforcing bars. Designdetailing supplements, key publications this popular publication is the definitive source for information on development and splicing of reinforcing bars. Hence details, development, and splices of reinforcementthe topics of this chapterare a crucial aspect of the design process. Get your kindle here, or download a free kindle reading app. When bundled bars are to be spliced by lapping, one reinforcement bar at a time is to be spliced and the splicing should be staggered. Recommendations for spacers, chairs and tying of steel reinforcement reliability considerations for hydraulic variables.
What are the types of mechanical splices for rebars. The bars met the requirements of astm a 615, with the exception that some of the experimental bars did not have bar markings. Mechanical splices are selected for various reasons. Because mechanical splices do not rely on the surrounding concrete to transfer the force between bars, splitting failures are not a concern, and the strength of the splice is not sensitive to the compressive strength of the concrete or the amount of cover. An experimental study of welded splices of reinforcing bars article in building and environment 4110. Splices low voltage 0600v 3 splices glossary of splicing terms pg. Methods of splicing reinforced bars the constructor. Observations of cracking behavior, strain measurements of reinforcement, and strength are reported. The concrete strains in the section at midheight of the column. Lenton spliced bars behave as continuous lengths of reinforcing steel bars by providing full strength in tension. When noncontact lap splices are used, the bars must be spaced no farther. Bullet connectors, blade and pin terminals, wire joints, quick splices, and a choice of matching quality crimping tools. Splice definition of splice by the free dictionary. Tension development length and lap splice design for reinforced.
Although welded splices can gave continuity of the bars, while there is still some serious question. Updated edition of reinforcing bars publication available. For tension splices where the area of the bars is twice that re q u i r ed by stru c t u r al analysis, the splices can be designed for less than 125 percent fy of the bar. Crsis reinforcement anchorage and splices includes tables of required lap splice lengths based on these variables.
Includes extensive tables of development and lap splice lengths for grade 60 uncoated and epoxycoated reinforcing bars with 3,000 to 10,000 psi concrete compressive strengths. Crsi reinforcement, anchorages and splices, 5th edition. Thaddeus hyatt, in his beam tests of 1876 and 1877, used anchorages. Top bars and other bars lap splices msucog civilenvironmental 7 jan 08 20. In the field, reinforcing bars are cast in concrete with the flanged coupler attached to the form face. The definitive source for information on development and splicing of reinforcing bars. These are designed based on codes of standard practice. This research aimed to experimentally study the anchorage behavior of headed reinforcement in lap splices. The use of reinforcing bar couplers or mechanical splices in reinforced concrete construction is on the increase. Powell electronics 200 commodore drive swedesboro, nj 08085 toll free. Anchorages and splices 6th edition 2017 crsi on amazon.
The influence of bond properties, lapsplice, beam anchorage reinforcing bars details, load type, slab participation, and bentup bars in the beam, are. Features technical data on mechanical splices including load tests for type 1 and type 2 splices, grades 40 to 80. Preformed line products plp serves the communications, energy, special industries and solar markets with connections you can count on. For comparison purpose an incremental tensile load tests were carried out on welded splices as shown in figure 4 a and coupler splices and or mechanical splice as shown in figure 4 b. Properly designed splices of individual reinforcing bars are a key element in transmitting forces through the structure and creating a load path. Reinforcement, anchorages and splices, 5th edition 2008 now available. Mechanical rebar splices are devices used to connect steel bars in reinforced concrete. Splices for reinforcing bars concrete construction magazine. Cyclic response of rc beamcolumn joints reinforced with plain bars. Tekla, revit and autocad components available to download on. If the general rules regarding laps cannot be obeyed in a construction, special welded splices or mechanical connections should be provided cl.
Also, it meant that cables could henceforth be made longer, with fewer sleeves and splices. Splices and erection of reinforcing bars using the development and lap splice length. Introduction to steel reinforcing bar splices crsi. After the formwork is removed, straight or bent splice bars are installed into the coupler to extend the reinforcing bar. Although there is a small amount of test data on anchorage.
Features technical data on mechanical splices including load tests for type 1 and type 2 splices. Sb centerline spacing between lapped headed bars, inches. Product line covers all standard components rings, forks, locking forks, butt splices and disconnects. Fax 8002450329 3 splices glossary of splicing terms glossary of splicing terms splice a splice may be considered as two or more conductors joined with a suitable connectorreinsulated, reshielded. Taper threaded splices lenton mechanical splices from erico, are a taperthreaded splicing system that assures a positive locking connection, providing continuity and structural integrity to reinforced concrete construction. A lap splice is the predominant method used for splicing reinforcing bars. The purpose of this technical note is to offer an introduction to steel reinforcing bar splices and is intended primarily to readers with limited experience with this subject. Of the ten more important items of information that must be included in the design drawings, typical details, or project specifications, two of the items cover development and splices of reinforcement sections 1. The concrete reinforcing steel institute has released an updated version of reinforcing bars. Mechanical rebar splices for rebars in concrete construction is an effective method of joining reinforcing bars. Prequalification of mechanical splices for reinforcing.
The length of lap should be increased 20 percent for a 3bar bundle and 33 percent for a 4bar bundle. Mechanical splices in reinforced concrete construction should meet the building code requirements for. Splices definition of splices by the free dictionary. Buy reinforcement anchorages in splices da 2 on free shipping on qualified orders. Seven conventional bars and five experimental bars were evaluated. Now in its sixth edition, the book features data on mechanical splices including load tests for. Lap splices are usually the most economical method, but if they cause excessive congestion, problems in placing concrete, or problems of design or detailing, some other kind of splice must be used.
This publication is a source for information on development and splicing of reinforcing bars. Observations of headed bar anchorage have shown that the final anchorage capacity consists of peak head bearing and reduced bond. Behaviour of beam lap splices under seismic loading. Lap splices of bundled bars should be based on the lap splice length recommended for individual bars of the same size, and individual splices within the bundle should not overlap each other. Headed bars of grade 600 mpa were used and main variables include splice length, spacing between bars, bar diameter, concrete strength, and confinement. Now in its sixth edition, the book features data on mechanical splices including load tests for type 1 and type 2 splices, grades 4080. It is interesting to note that they were a feature of the earliest designs. These bars were close to the corners diagonally opposite of the columns, as shown in figure 4a.
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