Experimental Evaluation of Post-Tensioned Precast Concrete Coupling Beams
Publication: Structures Congress 2009: Don't Mess with Structural Engineers: Expanding Our Role
Abstract
This paper presents the results from eight half-scale experiments of unbonded post-tensioned precast concrete coupling beams under reversed-cyclic lateral loading. Each test specimen includes a coupling beam and the adjacent concrete wall pier regions at a floor level. Under lateral loads, the nonlinear displacements of unbonded post-tensioned coupling beams are governed by the opening of gaps at the beam ends. Steel top and seat angles are used at the beam-to-wall joints to yield and provide energy dissipation. The test parameters include the beam post-tensioning tendon area and initial stress, initial beam concrete axial stress, angle strength, and beam depth. The results demonstrate the lateral stiffness, strength, and ductility of the test specimens under cyclic loading, with considerable energy dissipation concentrated in the angles. It is shown that the residual displacements upon unloading of the specimens are small due to the restoring effect of the post-tensioning force.
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Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Axial forces
- Beams
- Concrete
- Concrete beams
- Continuum mechanics
- Coupling
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering materials (by type)
- Engineering mechanics
- Forces (type)
- Lateral loads
- Material mechanics
- Material properties
- Materials engineering
- Mechanical properties
- Post-tensioned concrete
- Precast concrete
- Prestressed concrete
- Solid mechanics
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Tension
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