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Asian Journal of Applied Sciences
  Year: 2012 | Volume: 5 | Issue: 7 | Page No.: 485-496
DOI: 10.3923/ajaps.2012.485.496
Breakout Capacity of Headed Anchors in Steel Fibre Normal and High Strength Concrete
Saad Ali AlTaan, AbdulKader Ali Mohammed and Alaa AbdulRahman Al-Jaffal

Abstract:
This research studied the breakout capacity of cast-in-place single short-headed anchor bolts embedded in both normal and high strength steel fibrous reinforced concrete. Concrete strength ranged from 27.4 to 58 MPa, four volume fractions of steel fibres (0.4, 0.8, 1.2 and 1.6%), two aspect ratios (19.63, 36.36), three anchor diameters (8, 10 and 12 mm) and four embedment depths (25, 37.5, 50 and 62.5 mm) were used. The majority of the specimens were failed by concrete cone failure and the cone breaks into pieces in some cases (concrete failure), while the other specimens were failed by yielding or fracture of the bolts (steel failure). The tests results showed that the concrete angle cone is increasing with the embedment depth, the fibre reinforcing index and decreasing with the concrete strength. The breakout capacity of the anchors were increased by the addition of steel fibres to concrete and the size of the cones failure in fibrous concrete were smaller than the cones in plain concrete specimens. Based on the experimental results, an expression is proposed to estimate a variable concrete cone angle which is then used to predict the breakout capacity of single headed anchors embedded in normal and high strength fibrous concrete and showed good agreement with the test results. A regression equation based on the observed breakout capacities is also proposed to predict the breakout capacity and both methods showed the same degree of accuracy.
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How to cite this article:

Saad Ali AlTaan, AbdulKader Ali Mohammed and Alaa AbdulRahman Al-Jaffal, 2012. Breakout Capacity of Headed Anchors in Steel Fibre Normal and High Strength Concrete. Asian Journal of Applied Sciences, 5: 485-496.

DOI: 10.3923/ajaps.2012.485.496

URL: https://scialert.net/abstract/?doi=ajaps.2012.485.496

 
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