Bond Behavior of Tension Bar at Lap Splice of SCC Beam

Wu, Chung Hao; Chen, Ming Yuan; Chen, How Ji

doi:10.4028/www.scientific.net/kem.789.126

Cited by 8 publications

(6 citation statements)

References 4 publications

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“…Data on normal concrete bond strength were obtained from the research of Kazim Turk, A. Benli, Calayir [9], MH. Wolfe [10], Looney, M.Arezoumandi, J.Volz, J.Myers [11], M. Arezoumandi, Wolfe, Volz [12], Kazim Turk, Yildirim [13], Harajli, Abouniaj [14], Karatas, Turk, Ulucan [15], Chung-Hao Wu, Chen [16], Azizinamini, Hamad, and Harajli [17]. The study was conducted on concrete beam specimens with a lap splice.…”

Section: Methodsmentioning

confidence: 99%

“…The bond strength data of SCC can be summarized in table 2. The data on bond strength was obtained from the experimental research of Turk, Benli, Calayir [9], Looney, Arezoumandi, Myers [11], Karatas, Turk, Ulucan [15], Chung-Hao Wu and Chen [16], Ghasabeh and Canbay [18], Turk, Karatas, and Ulucan [19], and Pandurungan and Sreedaran [20]. Bond strength data of HVFA-SCC are obtained from Alghazali and Myers [22] and shown in table 4.…”

Section: Methodsmentioning

confidence: 99%

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Reinforcement to concrete bond strength: a comparison between normal concrete and various types of concrete

Rohman

Kristiawan

Saifullah

et al. 2022

J. Phys.: Conf. Ser.

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This paper describes the bond strength comparison between concrete and reinforcement with several types of concrete. The types of concrete studied were normal concrete (NC), Self-Compacting Concrete (SCC), High-Volume Fly Ash Concrete (HVFAC), and High-Volume Fly Ash Self-Compacting Concrete (HVFA-SCC). Research data were obtained from previous studies. The data of concrete bond strength were obtained by testing the reinforced concrete beam with a lap splice in the tensile moment area. Bond strength values were normalized by dividing with the square root of concrete grade. Then use normalized data to formulate the relationship between the length of lap splice to diameter ratio (ls/db) and the normalized bond strength concrete for both normal concrete and SCC. From the obtained relationship, we can compare the bond strength between NC and SCC. The SCC bond strength is higher than NC. Bond strength of HFVAC and HVFA-SCC is also higher than NC and SCC, so that the use of HVFA-SCC can reduce the need for lap splice.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Reinforcement to concrete bond strength: a comparison between normal concrete and various types of concrete

Rohman

Kristiawan

Saifullah

et al. 2022

J. Phys.: Conf. Ser.

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“…In addition, it was found that using a larger number of steel bars with smaller bar diameter increased both the beam ultimate capacity and ductility (El-Azab et al, 2014). Wu et al (Wu et al, 2018) investigated the lap splice bond strength in tension in NVC and SCC beams. Six beam specimens were cast and subjected to bending.…”

Section: Literature Reviewmentioning

confidence: 99%

“…They stated that the SCC and NVC beams presented similar bond strengths. In addition, both SCC and NVC beams with transverse stirrups had ductile flexural behaviour in the area of tension laps (Wu et al, 2018). They observed minor spalling between reinforcing steel and concrete under service loading (Wu et al, 2018).…”

Section: Literature Reviewmentioning

confidence: 99%

Steel Reinforced Self-Compacting Concrete (SCC) Cantilever Beams: Bond Behaviour in Poor Condition Zones

Montaser

Shaaban

Rizzuto

et al. 2023

Int J Concr Struct Mater

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Previous investigations carried out on reinforced self-compacted concrete (SCC) beams have reported contradictory results on reinforcement bond behaviour occurring in the zones defined for good bond conditions according to Eurocode2. Cantilevered SCC beams’ critical upper tension reinforcement bond behaviour has previously had limited reporting. In this study, the bond behaviour in normally vibrated concrete (NVC) and self-compacted concrete (SCC) in poor conditions zones are compared and the differences are highlighted. The effect of four parameters, including (i) concrete type (SCC and NVC), (ii) characteristic strength of SCC, (iii) lap splice length, and (iv) depth of concrete cover for the reinforcement is investigated. It was found that for the studied beams, increasing splice length improved the energy absorption and changed the failure mode to a more ductile manner even at the poor bond conditions zones. The maximum measured steel strains in SCC beams in the lap splice zones, were higher than those for NVC specimens. The mean bond stress values, for SCC beams with 25–50% lap splice lengths, were higher than those of NVC beams, with the same lap splice lengths, by 16–13%, respectively. The results of the current study showed that the empirical equations from the literature overestimated the bond strength of the splice lap length for cantilever upper steel in SCC beams with long splices which agrees with the state of the art as these equations were developed originally for short anchorage lengths.

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“…In addition, splice length data of special type of concretes (HVFA, SCC, HVFA-SCC) are included for this comparison. The following literatures provide the useful data: [23,33,39] for HVFA; [31,32,36,37,40]- [42] for SCC; and [43] for HVFA-SCC. The collected data is presented in Fig.…”

Section: Comparison To Other Concretementioning

confidence: 99%

Flexural performance of reinforced HS-HVFA-SCC beam with spliced plain bar

2022

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This research presents the use of flexural performance criteria for determining the required spliced length of tensile plain bar embedded in unconfined high strength-high volume fly ash-self compacting concrete (HS-HVFA-SCC) beam. Subsequently, the obtained splice length is compared with the splice length database of other concrete types. For the purpose of the investigation, five beams are designed with various spliced bars within the pure bending area. In addition, a beam with continuous bar is prepared as a reference beam. The beams are tested by a four-point loading scheme. The results show that splice lengths within a 342–570 mm (34.2db–57db) range provide sufficient development of strength in the reinforcements to sustain a higher flexural load than the reference beam. However, in term of stiffness and ductility, only beams with a splice length of at least 380 mm (38db) are superior compared to the reference beam. Based on the above consideration, the minimum splice length of tensile plain reinforcement for the investigated beams is 380 mm (38db). Comparison of the result with other concrete types suggests that the required splice length of tensile plain bar embedded in HS-HVFA-SCC follows the equations for estimating splice length of general concrete and self-compacting concrete (SCC) even though the equations are derived for deformed bars. This finding implies that an efficient splice length in HS-HVFA-SCC beam can be expected. Article Highlights HS-HVFA-SCC beam with a lap-spliced plain bar of 38db gives an equal flexural performance to the beam with continuous bar. The required splice length of plain bar in HS-HVFA-SCC beam is comparable to that of deformed bar in other concrete types. An expected efficiency of splice length can encourage the use of HS-HVFA-SCC for a variety of structural applications.

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Bond Behavior of Tension Bar at Lap Splice of SCC Beam

Cited by 8 publications

References 4 publications

Reinforcement to concrete bond strength: a comparison between normal concrete and various types of concrete

Reinforcement to concrete bond strength: a comparison between normal concrete and various types of concrete

Steel Reinforced Self-Compacting Concrete (SCC) Cantilever Beams: Bond Behaviour in Poor Condition Zones

Flexural performance of reinforced HS-HVFA-SCC beam with spliced plain bar

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