Abstract
The axial and flexure combined loading performance of a slender partially-composite concrete insulated wall design constructed using basalt fiber-reinforced polymer (BFRP) shear connectors and longitudinal BFRP reinforcement is investigated. The load-bearing wall panel sections, 600 mm wide and 2,700 mm long, were first subjected to axial loads ranging from 0 to 900 kN applied to the structural wythe only. The panels were then loaded to failure in four-point bending to develop the axial load-bending moment interaction diagram of the partially-composite system, which was compared to theoretical fully-composite and noncomposite curves. As axial load increased, failure under transverse loading changed from shear-compression of the structural wythe to diagonal splitting of insulation foam and rupture of BFRP connectors, then to crushing of the structural wythe. Composite action by the strength criterion reduced from 47 to 3% as axial load increased from 150 to 900 kN; while that by the stiffness criterion was much lower, 8–2.5%. Relative to a similar steel-reinforced wall panel with the same reinforcement ratio, the tested walls were 60–89% the strength; and the percentage increased with axial load. A method is introduced to estimate the effective centroid of the partially-composite wall in order to calculate the moment from the eccentric axial load applied to this load-bearing system.
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Acknowledgments
The authors are grateful for the support of Anchor Concrete Products, the Mitacs Accelerate Program, and the technical staff at the Civil Engineering Department at Queen’s University.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 20 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 24, 2015
Accepted: Jun 29, 2015
Published online: Sep 29, 2015
Discussion open until: Feb 29, 2016
Published in print: Jun 1, 2016
ASCE Technical Topics:
- Architectural engineering
- Axial loads
- Building insulation
- Building systems
- Concrete
- Engineering materials (by type)
- Engineering mechanics
- Fiber reinforced concrete
- Fiber reinforced polymer
- Geology
- Geotechnical engineering
- Longitudinal loads
- Materials engineering
- Polymer
- Precast concrete
- Rocks
- Static loads
- Statics (mechanics)
- Structural engineering
- Structural members
- Structural systems
- Synthetic materials
- Volcanic deposits
- Walls
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