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Behaviour of single bonded anchors in non-cracked and cracked steel fiber reinforced concrete under short-time tensile loading
Highlights Experimental investigations on bonded anchors in cracked/uncracked SFRC. Disruption of stresses cause reduction in strength and stiffness of anchors in crack. Reduction due to crack in SFRC similar to the reduction in normal concrete. An approach to consider cracked concrete for design of anchorages in SFRC is proposed. The new approach follows the current principles of design of anchorages.
Abstract Due to notch effect of the holes, the anchors installed in concrete are highly likely to be intercepted by cracks that may form due to thermal and/or mechanical loads on the structure. The presence of cracks, alters the behaviour of anchors by reducing their stiffness and load carrying capacity. The behaviour of anchors in steel fiber reinforced concrete (SFRC) is one of the prime focuses in anchor technology today. However, the current research lacks the knowledge on the behaviour of anchors in SFRC intercepted by a crack. This paper investigates the behaviour of single bonded anchors intercepted by a crack (cracked concrete) in SFRC undergoing concrete cone breakout failure. Experimental investigations are carried out on bonded anchors installed in SFRC with different concrete grades and different fiber content. The tests are performed on the anchors in uncracked concrete and corresponding tests in cracked concrete show that the enhancement of performance of the anchors due to SFRC in uncracked concrete and cracked concrete is rather similar and the relative reduction in stiffness and strength of the anchors in cracked compared to uncracked concrete is equivalent in SFRC and in normal concrete. Based on the tests, a new proposal for the concrete cone capacity of anchors in cracked SFRC is proposed.
Behaviour of single bonded anchors in non-cracked and cracked steel fiber reinforced concrete under short-time tensile loading
Highlights Experimental investigations on bonded anchors in cracked/uncracked SFRC. Disruption of stresses cause reduction in strength and stiffness of anchors in crack. Reduction due to crack in SFRC similar to the reduction in normal concrete. An approach to consider cracked concrete for design of anchorages in SFRC is proposed. The new approach follows the current principles of design of anchorages.
Abstract Due to notch effect of the holes, the anchors installed in concrete are highly likely to be intercepted by cracks that may form due to thermal and/or mechanical loads on the structure. The presence of cracks, alters the behaviour of anchors by reducing their stiffness and load carrying capacity. The behaviour of anchors in steel fiber reinforced concrete (SFRC) is one of the prime focuses in anchor technology today. However, the current research lacks the knowledge on the behaviour of anchors in SFRC intercepted by a crack. This paper investigates the behaviour of single bonded anchors intercepted by a crack (cracked concrete) in SFRC undergoing concrete cone breakout failure. Experimental investigations are carried out on bonded anchors installed in SFRC with different concrete grades and different fiber content. The tests are performed on the anchors in uncracked concrete and corresponding tests in cracked concrete show that the enhancement of performance of the anchors due to SFRC in uncracked concrete and cracked concrete is rather similar and the relative reduction in stiffness and strength of the anchors in cracked compared to uncracked concrete is equivalent in SFRC and in normal concrete. Based on the tests, a new proposal for the concrete cone capacity of anchors in cracked SFRC is proposed.
Behaviour of single bonded anchors in non-cracked and cracked steel fiber reinforced concrete under short-time tensile loading
Vita, Norbert (author) / Sharma, Akanshu (author)
Engineering Structures ; 245
2021-07-21
Article (Journal)
Electronic Resource
English
CREEP OF CRACKED POLYMER FIBER REINFORCED CONCRETE UNDER SUSTAINED TENSILE LOADING
| BASE | 2016