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Role of fiber reinforcement on lap splices behavior

Authors: Giovanni Plizzari; Giovanni Metelli;

Role of fiber reinforcement on lap splices behavior

Abstract

Bond behavior involves the formation of radial transversal pressure as a result of the wedge action of the crushed concrete between the bar ribs. The latter may cause the onset of longitudinally split- ting cracks when the tensile strength is reached in the concrete cover. The propagation of splitting cracks, and thus the brittle failure of the anchorage or a splice, can be efficiently counteracted by the confinement action provided by stirrups and/or by the post-cracking residual strength of fiber reinforced concrete (FRC), which allows a more uniform distribution of bond stress along a splice. Several full-scale beams reinforced with rebars of different diameters were tested with different percentages of longitudinal reinforcement lapped at mid-span. A traditional volume fraction of hooked steel fibers (equal to 0.5%) was adopted for FRC. Experimental results show that the toughness of FRC can enhance the behavior of the weak joint with only lapped bars. The capability of FRC to control the flexural and splitting crack opening and propagation can increase the strength of staggered lapped splices, thus allowing a reduction of lap length.

Country
Italy
Related Organizations
Keywords

Bond, tests, lap splices, FRC

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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