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Influence of Polymer Fibre Reinforcement on Concrete Anchor Breakout Failure Capacity
Julia Spyra1,2, Nikolaos Mellios1, Michael Borttscheller3
1Faculty of Architecture and Civil Engineering, TU Dortmund University, 44227 Dortmund, Germany.
Polymers
|August 10, 2024
Summary
Polymer fibre reinforcement enhances concrete anchoring systems, increasing load resistance by 15-20% and ductility. This study provides new models for designing anchors in fibre-reinforced concrete, addressing a gap in current standards.
Area of Science:
- Civil Engineering
- Materials Science
- Structural Engineering
Background:
- Current anchoring system design standards do not cover fibre-reinforced concrete.
- Steel fibre reinforcement in concrete anchoring is gaining traction, but polymer fibre reinforcement is under-researched.
- Fastening technology in fibre-reinforced concrete is a growing area of scientific interest.
Purpose of the Study:
- To investigate the effects of polymer fibre reinforcement on concrete anchoring systems.
- To develop alternative models for assessing concrete breakout resistance in polymer fibre-reinforced concrete.
- To evaluate the load-bearing behavior of anchoring systems in polymer fibre-reinforced concrete under tensile loading.
Main Methods:
- Experimental evaluation of system load-bearing behavior under tensile loading, focusing on concrete breakout failure.
- Determining material properties of polymer fibre-reinforced concrete.
- Mathematical interpretation of material properties to propose new assessment models.
Main Results:
- Polymer fibres significantly enhance concrete's load-bearing capacity and ductility under tensile loads.
- The addition of polymer fibres resulted in a 15-20% increase in anchor load resistance.
- Failure displacements were observed to double, indicating significantly improved ductility.
Conclusions:
- Polymer fibre reinforcement transforms concrete's quasi-brittle response to a more ductile behavior.
- The findings support the development of standardized design procedures for anchoring systems in polymer fibre-reinforced concrete.
- This research provides a basis for improved safety and performance in structures utilizing fibre-reinforced concrete anchoring.
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