Experimental evaluation of tensile behaviour of single cast-in-place anchor bolts in plain and steel fibre-reinforced normal- and high-strength concrete

Nilforoush, Rasoul; Nilsson, Martin; Elfgren, Lennart

doi:10.1016/j.engstruct.2017.05.062

Cited by 74 publications

(42 citation statements)

References 3 publications

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“…Compared to the measured concrete cone capacity in normal plain concrete, the increase of concrete cone capacity in SFRC (30 kg/m 3 and 50 kg/m 3 ) was 22% to 37% under quasi-static loading. The results fit well with the findings of Reference [20]. Based on the results, it seems reasonable to introduce a modification factor that accounts for the beneficial effect of the presence of steel fibers in the concrete and which is proportional to the amount of steel fibers dispersed into the concrete.…”

Section: Discussionsupporting

confidence: 88%

“…The concrete cone capacity of the single fasteners loaded in tension was improved by adding steel fibers to the basic mix and by increasing the loading rate. The observed increase fits well to the tendency reported by Nilforoush et al in Reference [20]. The increase due to fiber addition can be attributed to the fact that the fibers intercepted by the fracture surface provide additional resistance and contribute to the load-bearing capacity.…”

Section: Influence Of Steel Fiber Reinforcementsupporting

confidence: 90%

“…There is extensive research available in the field of SFRC for structural and non-structural applications, which confirms the beneficial effects including higher fracture energy, limited crack widths, higher impact and abrasion resistance, and increased durability compared to plain concrete [12][13][14][15][16]. However, there is only little research available on the load-bearing behavior of fasteners, which are installed in base materials other than plain concrete such as SFRC [17][18][19][20][21][22]. The evaluation of results from the literature shows that with the right choice of installation parameter combinations, the fiber content has a positive effect on the load-displacement behavior of the anchorages, in general, and a better utilization of fastening systems can be attained due to the more ductile behavior and due to the crack bridging mechanism of the SFRC (Figure 2).…”

Section: Introductionmentioning

confidence: 71%

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Fasteners in Steel Fiber Reinforced Concrete Subjected to Increased Loading Rates

Bokor

Tóth

Sharma

2018

Fibers

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Increased loading rates on fasteners may be caused by high ground accelerations as a consequence of e.g., nuclear explosions, earthquakes or car collisions. It was concluded by Hoehler et al. (2006) that fasteners under rapid loading rates show an increased ultimate resistance in the concrete dominant failure modes or the ultimate resistance is at least as large as under quasi-static loading. Due to the increased demand on using fasteners in steel fiber reinforced concrete (SFRC), it is intended to show how the ultimate concrete cone capacity of fasteners changes under higher than quasi-static loading rate in normal plain concrete (PC) and in SFRC. This paper presents the results of an extensive experimental program carried out on single fasteners loaded in tension in normal plain concrete and in SFRC. The test series were conducted using a servo-hydraulic loading cylinder. The tests were performed in displacement control with a programmed ramp speed of 1, 100, 1000, and 3500 mm/min. This corresponded to calculated initial loading rates ranging between 0.4 and 1600 kN/s. The results of the tension tests clearly show that the rate-dependent behavior of fasteners in SFRC with 30 and 50 kg/m3 hooked-end-type fibers fits well to the previously reported rate-dependent concrete cone behavior in normal plain concrete. Additionally, a positive influence of the fibers on the concrete cone capacity is clearly visible.

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Section: Discussionsupporting

confidence: 88%

Section: Influence Of Steel Fiber Reinforcementsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 71%

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Fasteners in Steel Fiber Reinforced Concrete Subjected to Increased Loading Rates

Bokor

Tóth

Sharma

2018

Fibers

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“…Concrete is a universal construction material which is widely used due to its excellent strength, low cost and durability . However, over decades, attempt has been made to enhance its deflection capacity, tensile strength and toughness (Nilforoush et al 2017). To reduce the brittleness of plain concrete, fibers are added in concrete to improve its mechanical properties especially post cracking behaviour and tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Influence of CaCO3 whiskers, steel fibers and basalt fibers hybridization on flexural toughness of concrete

Khan¹,

Cao²,

Ali³

2019

Sustainable Construction Materials and Technologies (SCMT)

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Nowadays, hybrid fiber reinforced concrete is developed with the combination of CaCO3 whiskers, steel and basalt fibers due to their enhanced mechanical properties of structural applications. In this study, the effect of different basalt fiber contents on flexural strength of hybrid fiber reinforced concrete (HyFRC) is investigated. In addition to this, the energy absorbed (E), toughness indices (TI) up to specified point and residual strength factor (RSF) are also calculated according to the ASTM C1018. The steel fibers and CaCO3 whiskers having contents of 5% each, by cement mass, are added. To prepare HyFRC, HyFRC1, HyFRC2, and HyFRC3, different basalt fiber content of 0%, 2.5%, 5% and 7.5%, respectively, are added. The increment in flexural strength of HyFRC up to 16% is observed. Future recommendations are to optimize basalt fiber length and content for mechanical properties of HyFRC.

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“…Steel fibers are used to decrease the thickness, obtaining higher strength properties, and it is applied in road construction, pre-cast concrete, tunnels, airports, and the building industry. Over recent years, extensive studies have been done on steel fiber reinforced concrete to increase mechanical properties and durability [10][11][12][13][14][15]. Steel fibers have various benefits, but it leads to steel corrosion and cracks in certain environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Mechanical Properties and Post-Cracking Behavior of Polyolefin Fiber Reinforced Concrete

Adhikary

Rudžionis

Balakrishnan

et al. 2019

Fibers

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This paper deals with the behavior of concrete’s self-compatibility in a fresh state and its compressive and flexural strength in a hardened state with the addition of polyolefin macro fibers. Four different amounts (3 kg/m3, 4.5 kg/m3, 6 kg/m3, and 9 kg/m3) of polyolefin macro fibers were mixed into the concrete mixture to observe the differences in workability and strength properties between the concrete specimens. As a partial replacement of cement, class C type of fly ash was added to make up 25% of the total cement mass. The water-binder ratio (W/B) of the concrete mix was 0.36. Superplasticizer was added to the concrete mixture to achieve self-compacting properties. The slump test was carried out in the fresh state for determining the flowability. On the 7th and 28th days of the curing process, compression strength tests were performed, and on the 28th day, flexural strength tests and crack mouth opening displacement (CMOD) analyses were carried out to determine the strength properties and post-cracking behavior of the concrete samples. Bending strength and post-cracking behavior of the samples were improved by the addition of fibers. The fiber concentration in the concrete mixture greatly influenced the slump flow and self-compaction properties.

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Experimental evaluation of tensile behaviour of single cast-in-place anchor bolts in plain and steel fibre-reinforced normal- and high-strength concrete

Cited by 74 publications

References 3 publications

Fasteners in Steel Fiber Reinforced Concrete Subjected to Increased Loading Rates

Fasteners in Steel Fiber Reinforced Concrete Subjected to Increased Loading Rates

Influence of CaCO3 whiskers, steel fibers and basalt fibers hybridization on flexural toughness of concrete

Investigation on the Mechanical Properties and Post-Cracking Behavior of Polyolefin Fiber Reinforced Concrete

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