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Thursday, May 14, 2020 | History

4 edition of theory of bond applied to overlapped tensile reinforcement splices for deformed bars. found in the catalog.

theory of bond applied to overlapped tensile reinforcement splices for deformed bars.

Ralejs Tepfers

theory of bond applied to overlapped tensile reinforcement splices for deformed bars.

by Ralejs Tepfers

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Published by Chalmers Tekniska Högskola, Bygg-och miljöteknik, Konstruktionsteknik, Betongbyggnad in Göteborg .
Written in English


Edition Notes

SeriesPublication -- 73:2.
The Physical Object
Pagination328 s
Number of Pages328
ID Numbers
Open LibraryOL20374555M

BOND OF EPOXY-COATED REINFORCEMENT TO CONCRETE: SPLICES ABSTRACT The effects of epoxy coating and transverse reinforcement on the splice strength of reinfor­ cing bars in concrete are described. Tests included 65 beam and slab splice specimens for mem­ bers containing No. 6 and No. 8 bars. The average coating thickness ranged from 6 to 11 mis. Bond is an important factor that transfers stresses in rebars. The strength of lap splices also depends on whether the spliced bars are in contact or separated. For improved performance, rebars should be spliced or lapped over a minimum distance L' or L d. However, .

[21] Tepfer, R, “ A theory of bond applied to overlapped tensile reinforcement splices of deformed bars” Report , Chalmers University of Technology, Goteborg, IJSER. Pull-out and tensile reinforcement splice tests using FRP C-BARs Ralejs Tepfers, Mats Karlsson Third International Symposium on Non-metallic (FRP) Reinforcement for Concrete Structures, Sapporo October , p.

  In this study, normal concrete (NC) and four types of self-compacting concrete (SCC), in which cement was partially replaced by 5%, 10%, 15%, and 20% of silica fume (SF), were used to evaluate the effect of SF content on the bond strength of tension lap-spliced bars embedded in NC and SCC specimens. Bonded reinforcement must be added where computed tensile stresses in the span exceed 2 (√ f’ c) [ √ f’ c], The minimum area of bonded reinforcement is: A s =N c /(*f y) () In order to limit crack widths, the value used for f y cannot be more t psi ( MPa). N c is the force of the tensile stress block over.


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Theory of bond applied to overlapped tensile reinforcement splices for deformed bars by Ralejs Tepfers Download PDF EPUB FB2

A Theory of Bond Applied to Overlapped Tensile Reinforcement Splices for Deformed Bars. Publ Division of Concrete Structures, Chalmers University of Technology, Göteborg, Mayp.

Author: Ralejs Tepfers. Theory of bond applied to overlapped tensile reinforcement splices for deformed bars. (OCoLC) Material Type: Document, Thesis/dissertation, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: Ralejs.

A theory of bond applied to overlapped tensile reinforcement splices for deformed bars Doctoral thesis, A bond theory for deformed reinforcing bars in concrete is elaborated taking into account different stages in development of final rupture occurring as splitting or by:   R.

Tepfers, A Theory of Bond Applied to Overlapped Tensile Reinforcement Splices for Deformed Bars, Doctoral Thesis, Work No. Publ.Division of Concrete Structures, Chalmers University of Technology, Göteborg (May, ).

Google ScholarCited by: Bond strength of reinforcement in splices in beams and splitting cracks along the overlapped bars. Since large-sized beam specimen, which can loaded tested to investigate the bond strength of deformed bars. The details of test beams are given in Table 1 and Fig.

In all the experiments, the variable used was the reinforcing bar by: 7. This paper reports the effect of transverse reinforcement on tensile reinforcement splice strength of epoxy coated reinforcing bars. Thirty six (36) full size beams of varying lengths and. The bond between reinforcement and concrete matrix results in hoop stress around the bar and longitudinal cracks occur subsequently.

Anchorages of reinforcement in structural concrete were tested in bond tests with short bond lengths or lapped splices by many authors. Recently, Darwin et al. reported tests on 49 tensile splices of bars with high relative rib area six of these specimens contained transverse reinforcement and 13 specimens did not.

For splices not confined by transverse reinforcement, the value of test/calculated bond strength, using Eq.(8), does not seem to be influenced by the value of R.

reinforcement and concrete. Tensile forces in the area of separating cracks and bending cracks are carried by the reinforcement and transferred into concrete by bond action. Crack widths and crack spacing are therefore significantly dependent on the bond properties of the applied reinforcement.

Thus, stiffness and deformation. A Theory of Bond Applied to Overlapped Tensile Reinforcement Splices for Deformed Bars, Ph.D. Thesis, Chalmers University of Technology, Gothenburg, Sweden. Google Scholar View Abstract. Tepfers R () A theory of bond applied to overlapped tensile reinforcement splices for deformed bars, Chalmers University of Technology, Goteborg J Mater Sci () – You've reached the end of your free preview.

Studiehandbok by Chalmers tekniska högskola A theory of bond applied to overlapped tensile reinforcement splices for deformed bars by Ralejs Tepfers () 2 editions published. Tensile and bond stresses were measured along reinforcing bars by a new technique which does not disturb bond stresses.

Curves for representative beam and pull-out specimens show tensile force distribution, bond stress distribution, applied moment versus measured bar tension, comparison of beam and pull-out tensile force distribution, and. When the length of reinforcement bar has to be extended in reinforced concrete structural member splicing is used to join two reinforcement bars to transfer the force from one bar to the joining bar.

The forces are transferred from one bar to the. Effects of epoxy coating and transverse reinforcement on the splice length of reinforcing bars in concrete are described. A total of 65 beam and slab splice specimens containing No.

6 and No. 8 bars were tested. The average coating thickness ranged from 6 to 11 mils. page CIVL Development Length Chapter BOND AND ANCHORAGE Reading Assignment Chapter 5 of text ACI Chapter Introduction Reinforcement for concrete to develop the strength of a section in tension depends on the.

Reinforcing steel bars of sizes (8mmØ, 10mmØ, 12mmØ, 16mmØ and 20mmØ) were obtained from commercially available super ductile hot rolled SD TMT deformed bars conforming to BIS (Bureau Of Indian Standards).The minimum reported values of yield strength, ultimate strength, and elongation at failure are given in Table 1 while the surface characteristics are given in Table 2.

Bond of Epoxy-Coated Reinforcement: Splices by Cynthia J. Hester, Shahin Salamizavaregh, David Darwin, and Steven L. McCabe The effects of epoxy coating and transverse reinforcement on the splice strength of reinforcing bars in concrete are described.

A total of 65 beam and slab splice specimens containing No. 6 and No. 8 bars were tested. Most of the reinforced concrete structures won’t be provided with full length reinforced bars. The manufacture and transportation of long bars are The method used to join the reinforcement bars, so that the force is transferred effectively from one bar to the other is called as splicing.

The integrity of the concrete structure is dependent on proper splicing of the reinforcement bars. Figure 3: Bond stress vs. slip behavior of deformed bars 3 BOND-SLIP TESTS ON LARGE-DIAMETER BARS As part of the study reported here, pull-out tests were conducted on large-diameter rein-forcing bars embedded in well-confined concrete to obtain their local bond-slip behavior.

the tensile strength is increasing at a slower rate, the result is that tensile failure before crushing occurs if the concrete Table 1—Lap splice lengths of deformed bars and deformed wires in tension (ACI ) A sprov/A sreqd * over length of splice Maximum percent of A s spliced within required lap length Splice type ℓ st ≥ Lapped splices in tensile reinforcement are generally not used for bars of size larger than a) 18 mm diameter b) 24 mm diameter c) 30 mm diameter d) 36 mm diameter.

Lapped splices in tensile reinforcement are generally not used for bars of size larger than a) 18 mm diameter b) 24 mm diameter c) 30 mm diameter d) 36 mm diameter.By Eric Carleton, P.E. Many factors play a part to ensure the bond strength between reinforcement and concrete is strong.

W hen you hear the word bond, you may think of agent James Bond, who was made famous by Ian Fleming’s novels and corresponding hit movies. However, those who work in the concrete industry likely think of the interaction between concrete and reinforcement.