Accession Number:

AD0658293

Title:

INFLUENCE OF REINFORCING DETAILS ON YIELD LINE PATTERN AND ULTIMATE LOAD-CARRYING OF REINFORCED CONCRETE SLABS,

Descriptive Note:

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s):

Report Date:

1967-08-01

Pagination or Media Count:

101.0

Abstract:

The objectives of this study were to determine the influence of reinforcing details i.e. of geometry and number of bent or stopped-off bars, of corner reinforcement, of column strips, ets. on the yield line pattern and the load-carrying capacity of elementary reinforced concrete slabs, and to test the applicability of the yield line theory to the evaluation of these influences. A total of seven simply supported slabs, 66 by 66 by 1 in. and 60-in. clearspan, with identical isotropic midslab reinforcement p 0.8 and various arrangements of bent bars and corner reinforcements, were cast and tested under uniform loads to flexural failure. Two one-way slab strips, 66 by 12 in. by 1 in. and 60-in. span, served to determine the ultimate moment. Rigorous yield line analysis, which took into consideration the effects of common inhomogeneities and anisotropies in the slab reinforcement, was performed for elementary geometries and boundary conditions, and theoretical predictions were compared with experimentally obtained results. The results of the few tests verify the theoretical conclusion that reinforcing details, though generally disregarded in yield line analysis, may have a significant effect upon the crack pattern and the ultimate load-carrying capacity of slabs, and may cause variation of as much as 30 in the flexural strength of the slabs. Yield line analysis procedures, however, are apparently well suited to evaluate these influences, at least for the case of elementary slabs. Author

Subject Categories:

  • Ceramics, Refractories and Glass
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE