Development of Computer Program and Preparation of Design Aids for Commonly Used Sections of Rc Shear Wall Systems
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Date
2005-12
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Addis Ababa University
Abstract
In this paper capacity of commonly used reinforced concrete shear wall systems (rectangular, I-shaped, channel shaped, T and L-shaped) is graphically presented in order to provide design aids for the designers. When the section subjected to uni-axial and biaxial bending with axial compression the strength can be computed by assuming different position of neutral axis depth. For each position of neutral axis, the strain distributions across the section of the walls are determined. The stress in each reinforcement layers also determined from the known strain distribution. The strength of L-shaped or channel cross section subjected to axial compression and bi-axial bending can be computed based on the boundary condition for the concrete compression zone. To determine the boundary condition first the inclination of plane of bending (neutral axis inclination) with respect to x-axis is computed. Then axial and bending strength of concrete section can be determined by assuming different neutral axis depth perpendicular to the bending plane. Computer programs were developed for the analysis and design of rectangular, channel, I-shaped, L-shape, T-shaped reinforced concrete shear walls subjected to uni-axial bending with axial compression. Uni-axial design charts are also plotted for those shear wall sections (see in Appendix A). Moreover, for channel and L-shaped cross section shear wall systems, bi-axial interaction charts can be produced using the developed computer program for bi-axial bending. In addition, the program computes the required flexural vertical reinforcement for the given flexures (P, Mdx, Mdy).
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Computer; Program