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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Load-Deformation Relationships for High Strength Concrete Beams Reinforced With Prestressed Prisms as Main Reinforcement
Author(s): B. Chen and E. G. Nawy
Publication: Special Publication
Appears on pages(s): 127-148
Keywords: beams (supports); cracking (fracturing); high-strength concretes; deflection; moment-curvature relationship; prestressed concrete; prisms; strains; Structural Research
Abstract:Use of prestressed prisms as main reinforcement has been demonstrated to be effective in limiting cracks and reducing deflections in high-strength, high performance concrete beams. To further understand the load-deformation history of such type of structural members, computer-simulated analysis has been conducted. A nonlinear analytical model based on strain compatibility was established. Theoretical predictions are compared with the experimental data obtained by the authors. Comprehensive computer-simulated flexural tests were also performed on a theoretical member section to further identify the variables which may affect the structural behavior. Parametric study suggests that the section ductility is mainly controlled by the reinforcing index. The influences of the effective prestress and concrete strength on ductility is found to be insignificant. Fiber optic Bragg-grating sensor technology was developed and used to internally and externally measure the deformations and cracking in the specimens.
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