Title:
Compressive Strength of Concrete in Nonprismatic Elements
Author(s):
Santiago Pujol, Jeffrey M. Rautenberg, and Mete A. Sozen
Publication:
Concrete International
Volume:
33
Issue:
9
Appears on pages(s):
42-49
Keywords:
strut-and-tie, nonprismatic strut, “bottle-shaped” strut, compression, strength
DOI:
Date:
9/1/2011
Abstract:
Appendix A of “Building Code Requirements for Structural Concrete (ACI 318-2011) and Commentary” provides requirements for design using strut-and-tie models, including provisions for the effective capacities of prismatic and nonprismatic (bottle-shaped) struts. The authors examine whether an increase in the width of a strut results in a reduction of its unit bearing strength. Based on their test results, the authors conclude that attributing a reduction in allowable compressive strength to the shape of a strut is an unnecessary rationalization.