Abstract
This paper attempts to determine the strength of compressed struts to be used in strut-and-tie modeling. The strength of the struts were evaluated for safety and accuracy as provided by the American Concrete Institute (ACI) and the American Association of State Highway and Transportation Officials (AASHTO) provision guidelines. In the experiment, 26 concrete panels were tested to failure. The investigation examined various effects, including: reinforcement crossing strut axis, angle between reinforcing steel and strut axis, specimen width, specimen thickness, three-dimensional stress state, bundled versus distributed reinforcement, compression reinforcement and boundary conditions on tests. It appears that the ACI’s specifications demonstrated erratic, but conservative results when compared with the test data, while the AASHTO’s standards were less conservative and more consistent.
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