Ability of steel fibers to enhance the shear and flexural behavior of high-strength concrete beams subjected to blast loads

Algassem, Omar; Li, Yang; Aoude, Hassan

doi:10.1016/j.engstruct.2019.109611

Cited by 29 publications

(9 citation statements)

References 44 publications

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“…They help to predict beam failure under shear. Algassem et al [ 102 ] tested 125 × 250 × 2440 mm RC beams containing different types and volumes of steel fibers (including various combinations of stirrups) under blast and static loading using a shock tube and four-point loading test, respectively. The fibers acted as an alternative to stirrups during blast loading, resisting shear and providing better outcomes at a 1% volume proportion.…”

Section: Application Of Steel Fibers In Structural Elementsmentioning

confidence: 99%

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

et al. 2022

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In recent years, concrete technology has advanced, prompting engineers and researchers to adopt advanced materials to improve strength and durability. Steel-fiber-reinforced concrete (SFRC) represents the substantial modification of concrete materials to improve their structural properties, particularly their flexural and tensile strength. Whether SFRC is stronger than conventional concrete depends on a variety of variables, including the volume, size, percentage, shape, and distribution of fibers. This article provides a comprehensive discussion of the properties of SFRC, such as durability, fire resistance, and impact resistance or blast loading, as well as the application of SFRC in structural members including beams, columns, slabs, and walls. The application of steel fibers in various types of concrete, including pre-stressed, pre-cast, self-compacting, and geopolymer concrete, was also examined in this comparative analysis review, and recommendations for the future scope of SFRC were identified.

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Section: Application Of Steel Fibers In Structural Elementsmentioning

confidence: 99%

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

et al. 2022

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“…Moreover, different fracture toughness of various concrete will result in different failure modes [ 27 ]. At present, HSFRC was mainly used in special protection structures and structure-strengthening engineering [ 28 , 29 ]. However, there was hardly research on steel-HSFRC composite beams.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Static Performance of Stud Connectors in Steel-HSFRC Composite Beams

Tang

Xue

et al. 2021

Materials

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In this research, high strength fiber reinforced concrete (HSFRC) was used to replace the normal strength concrete (NSC) in steel-concrete composite beams to improve their working performance, which might change the static performance of stud connectors. Firstly, push-out tests were conducted to investigation on the static performance of stud connectors in steel-HSFRC composite beams and compared with steel-NSC composite beams. Studs of 8 sizes, 13 mm, 16 mm, 19 mm and 22 mm in diameter and 80 mm and 120 mm in height were adopted to study the influence of stud dimension. The test phenomenon shown that the crack resistance of HSFRC was better than that of NSC, and there were some splitting cracks on NSC slabs whereas no visible cracks on HSFRC slabs when specimens failed. Next, the load-slip curves of studs were analyzed and a typical load-slip curve was proposed which was divided into four stages. In addition, the effects of test parameters were analyzed according to the characteristic points of load-slip curve. Compared with NSC slab, HSFRC slab could provide greater restraining force to the studs, which improved the shear capacity and stiffness of studs while suppressed the ductility of studs. The shear capacity, stiffness and ductility of studs would significantly increase with the increasement of stud diameter and the studs with large diameter were more suitable for steel-HSFRC composite beams. The stud height had no obvious influence on the static performance of studs. Finally, based on the test results, the empirical formulas for load-slip curve and shear capacity of stud connectors embedded in HSFRC were developed which considered the influence factors more comprehensively and had better accuracy and applicability than previous formulas.

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“…Steel fibers are not considered as a replacement of longitudinal reinforcement in structural elements [9–11]. Researchers showed that steel fibers can be used to enhance the structural performance of different concrete elements, such as the shear behavior of high‐strength concrete beams subjected to blast loading [12], seismic performance of high‐strength concrete composite shear walls [13], and punching shear strength of concrete slabs [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of steel fiber on the shear behavior of reinforced recycled aggregate concrete beams

Ibrahim

Fawzy

Farouk

2021

Structural Concrete

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In this research, the influence of using steel fibers on the shear action of reinforced concrete beams, made of recycled concrete aggregate (RCA), was investigated through experiment and finite element analysis (FEA). First, 12 reinforced concrete beams were tested with varying amounts of steel fibers. These beams contained normal concrete aggregate (NCA) as reference beams besides RCA beams. All beam models had the same 150 mm x 250 mm cross‐section and 2000 mm length. The beams had three bars of 16 mm reinforcement and two bars of 12 mm reinforcement at its bottom and top, respectively. Three replacement ratios of recycled aggregate (RA) were considered; 0%, 30%, and 70%. Moreover, steel fibers were introduced in the beams at 0%, 0.5%, 1%, and 1.5% content by volume. The beams were evaluated under a four‐point bending test while the load‐deflection diagram and failure load for all beams were considered as the criteria for comparing the shear response of different beams. A thorough FEA was carried out using ANSYS to model these beams. The FEA results were compared with the outcomes of the experimental tests, and a clear agreement was obtained. The results showed that using steel fibers improved the shear strength of the beams by 2.94%, 15.88%, and 34.71% for NAC beams, 1.39%, 11.11%, and 16.67% for 30% RCA beams, and 24.53%, 40.57%, and 59.44% for 70% RCA beams, respectively by using steel fibers with ratios of 0.5%, 1%, and 1.5%, respectively.

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Ability of steel fibers to enhance the shear and flexural behavior of high-strength concrete beams subjected to blast loads

Cited by 29 publications

References 44 publications

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

A Comprehensive Analysis of the Use of SFRC in Structures and Its Current State of Development in the Construction Industry

Experimental Investigation on the Static Performance of Stud Connectors in Steel-HSFRC Composite Beams

Effect of steel fiber on the shear behavior of reinforced recycled aggregate concrete beams

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