NEHRP Clearinghouse

Title
Recommended Procedure for Calculation of the Balanced Reinforcement Ratio.
File
PB93214500.pdf
Author(s)
Kariotis, J. C.; Waqfi, O. M.
Source
National Science Foundation, Washington, DC., February 1992, 74 p.
Identifying Number(s)
REPT-2.3-7
Abstract
The research proposes a criterion for shear walls which limits the maximum vertical steel ratio. The criterion is based upon wall geometry and the axial load on the wall. It is recognized that the balanced condition, that is, the stress in masonry and the stress in reinforcement rearch their maximum limits simultaneously, is a function of the axial loadas well as the wall geometry. The reinforcement ratio corresponding to such balanced condition can be calculated by equating the compression forces to the tension forces in the reinforcement and the axial loading. The force resisted by the reinforcement in the compression zone is ignored for simplicity.
Keywords
; Earthquake engineering; Reinforcing steels; Masonry; Seismic design; Flexural strength; Reinforced concrete; Walls; Mathematical models; Shear strength; Compressive strength