Abstract
Tests of 19 beams made with high-strength concrete showed that use of the current ACl rectangular stress block was conservative for semicircular compression zones, but slightly unconservative for triangular compression zones. Concrete strengths f c ' were 9630, 12,800, and 14,830 psi (66.4, 88.2, and 102.2 MPa). Eight beams were constructed with a semicircular cross section to model the compression zone found in a circular column under combined axial load and bending, while eleven were constructed with a triangular cross section to model rectangular columns under bioxial bending. The amount of reinforcing was varied to influence the size of the compression zone and location of neutral axis. Each beam was gaged to measure strain in both the concrete and steel. The rectangular stress block may be used to predict the moment strength of sections with nonrectangulor compression zones made with high-strength concrete, although ir is slightly unconservative for triangular compression zones
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
