We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Shear Strength and Behavior of High-Strength Concrete Prestressed Beams.
- Authors
Villamizar, Sandra; Ramirez, Julio A.; Aguilar, Gerardo
- Abstract
Current design provisions for shear strength in AASHTO LRFD 2012 and ACI 318-14 have a limit on the compressive concrete strength of 10,000 psi (69 MPa) based on empirical evidence. In this paper, the requirements for minimum transverse reinforcement and maximum shear strength were evaluated for high-strength concrete. Four AASHTO Type I prestressed beams with concrete compressive strengths from 10,000 to 15,000 psi (69 to 105 MPa), and shear reinforcement ratios ?vfyv near the minimum (326 psi [2.3 MPa]) and maximum (1305 psi [9.0 MPa]) limits were tested. The key findings in this paper supported the adequacy of the prescribed minimum amount of shear reinforcement in both design documents with regard to reserve strength after first inclined cracking and adequate crack control for service loads. However, an upper limit for the nominal shear strength of 12√fc' is recommended for members with concrete compressive strengths up to 15,000 psi (105 MPa).
- Subjects
PRESTRESSED concrete beams; SHEAR strength; HIGH strength concrete; CRACKS in reinforced concrete; MECHANICAL loads
- Publication
ACI Structural Journal, 2017, Vol 114, Issue 1, p277
- ISSN
0889-3241
- Publication type
Article
- DOI
10.14359/51689458