A multi-index synthetical evaluation of pull-out behaviors of hooked-end steel fiber embedded in mortars

Ding, Xinxin; Zhao, Minglei; Li, Changyong; Li, Jie; Zhao, Xusheng

doi:10.1016/j.conbuildmat.2020.122219

Cited by 23 publications

(19 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many studies based on the pullout test of single or multi aligned fibers have been performed in order to understand the bond behaviors of steel fibers in concrete or mortar. Except for the geometry of steel fiber, rough surface of steel fiber [ 13 ] and high-performance cementitious matrix [ 10 , 14 , 15 ] benefit to the bond performance. By purposefully reinforcing the strength or the toughness of cementitious matrix, or both simultaneously, different deformed steel fibers can be selected with different bond behaviors [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…The pullout performances of different deformed steel fibers with hook-end, crimped, indentation, milled and large-end in the mortars with different strengths and aggregates have been systematically studied in previous works [ 14 , 16 ]. A multi-index synthetical evaluation method was built based on the key points of the characteristic pullout load-slip ( PL-S ) curve to quantitatively evaluate the bond strengths, energy dissipation abilities and toughness of steel fiber, which corresponded to the loading cases of cracking resistance, normal serviceability and ultimate bearing capacity of SFRC, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…One series were tested with the number of aligned fibers of 1, 2, 9, 16 and 25. Subsequently, several important pullout parameters [ 14 , 16 ], including the debonding strength, bond strength, residual bond strength and the debonding work, slipping work and pullout work, as well as the debonding energy ratio, slipping energy ratio and pullout energy ratio, were analyzed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bond Behaviors of Steel Fiber in Mortar Affected by Inclination Angle and Fiber Spacing

Ding

Zhao

et al. 2022

Materials

Self Cite

View full text Add to dashboard Cite

Considering the random orientation and distribution of steel fibers in concrete, the synergistic reinforcement of steel fibers on concrete is much complex than the bond of single fiber. It is meaningful to study the bond behavior of steel fiber during many actions. With the inclination angle of steel fiber to pullout direction and the fiber spacing as main factors, this paper carried out fifteen groups of pullout tests for hook-end steel fiber embedded in manufactured sand mortar. The inclination angle ranged from 0 to 60°, and the fiber spacing ranged from 3.5 mm to 21.2 mm. The characteristic pullout load-slip (PL-S) curve of steel fibers are given out after treating the original complete curves of each group test. The values of key points featured the debonding, peak and residual pullout loads and slips are determined from the characteristic PL-S curves. Based on a multi-index synthetical evaluation method, the nominal debonding strength, bond strength, residual bond strength and the debonding work, slipping work, and pullout work, as well as the debonding energy ratio, slipping energy ratio, and pullout energy ratio are analyzed. Results indicate that the bond performance represented by above indexes changes with the inclination angle and spacing of steel fibers. Except for the bond mechanism performing the same as aligned steel fibers by pullout test, the bond is dominated by the resistance of mortar to peeling off near pullout surface and scraping along pullout direction. When the inclination angle is over 15° or 30°, the bond performance is generally decreased, due to the peeling off of mortar on surface of transversal section with a certain depth. When the fiber spacing is over than 5 mm, the bond performance becomes worst due to the scraping out of mortar along with the slip of steel fibers.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bond Behaviors of Steel Fiber in Mortar Affected by Inclination Angle and Fiber Spacing

Ding

Zhao

et al. 2022

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The addition of steel fiber greatly increases the properties of RPC, especially the ductility and energy dissipation [14][15][16][17]. The cracks in the concrete reinforced with steel fiber can be restrained due to the bridging effect at the crack locations [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…The cracks in the concrete reinforced with steel fiber can be restrained due to the bridging effect at the crack locations [18,19]. Therefore, the residual bond strength of concrete is improved via the addition of steel fibers [16]. Furthermore, the steel fibers can restrain shear cracks and delay or even prevent shear failure [17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fiber Shape and Volume Content on the Performance of Reactive Powder Concrete (RPC)

2021

View full text Add to dashboard Cite

This research studied the influence of three types of open (short-straight, long-straight, semicircular) and three different shapes of closed steel fibers (triangular, rectangular, circular) with different fiber contents by volume (0, 0.5%, 1%, 1.5%, and 2%) on the working and mechanical performance of reactive powder concrete (RPC). The results indicated that (1) the number of steel fibers and the enclosed area formed by closed steel fibers would remarkably impact the performance of RPC; (2) the semicircular fiber improves RPC’s strength the most among the three open shapes; (3) the short-straight fiber works more effectively than the closed steel fibers; (4) the circular fiber works the most efficiently in improving RPC’s mechanical performance while the triangular ones have the least effect among the three closed steel fibers; (5) both the closed and open steel fibers improve their compressive strength more than their flexural strength; (6) the closed steel fiber works more efficiently in improving the flexural strength but less efficiently in improving the compressive strength; (7) the open steel fibers enhance the mechanical performance of RPC via their anchoring performance while the closed steel fibers work by confining the concrete; (8) the hybrid utilization of steel fibers improves RPC’s mechanical performance to a higher level via combing the advantages of open and closed steel fibers.

show abstract

Analysis and prediction of the compressive and splitting tensile performances for the novel multiple hooked‐end steel fiber reinforced concrete

Guo

Pang

Chen

et al. 2023

Structural Concrete

View full text Add to dashboard Cite

In recent years, the application of the novel multiple hooked-end steel fiber has gradually become a hot spot in the engineering due to its several excellent properties. In this study, the splitting tensile and compressive properties of the SFRC with 3D single hooked-end and 4D/5D multiple hooked-end steel fibers were studied. The variables of the experimental investigation included the concrete matrix strength, steel fiber content, and aspect ratio. The results showed that the compressive strength of steel fiber reinforced concrete (SFRC) increased first and then decreased with the increasing steel fiber content. The concrete matrix, aspect ratio, and end hook number of steel fiber had the significant effect on the optimal steel fiber content. In addition, increasing the content of steel fiber was the most effective way to improve the splitting tensile strength of SFRC, and the splitting tensile strength increased with the increase of the aspect ratio and end hook number of steel fiber. Finally, the splitting tensile strength prediction model of SFRC with novel multiple hooked-end steel fiber was proposed by introducing the steel fiber number in the SFRC section, and the accuracy of the model was verified by comparison with experimental data.

show abstract

A multi-index synthetical evaluation of pull-out behaviors of hooked-end steel fiber embedded in mortars

Cited by 23 publications

References 27 publications

Bond Behaviors of Steel Fiber in Mortar Affected by Inclination Angle and Fiber Spacing

Bond Behaviors of Steel Fiber in Mortar Affected by Inclination Angle and Fiber Spacing

Influence of Fiber Shape and Volume Content on the Performance of Reactive Powder Concrete (RPC)

Analysis and prediction of the compressive and splitting tensile performances for the novel multiple hooked‐end steel fiber reinforced concrete

Contact Info

Product

Resources

About