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- Title
Effect of Aspect Ratio, Flanges, and Material Strength on Squat Reinforced Concrete Shear Walls.
- Authors
Devine, Robert D.; Barbachyn, Steven M.; Thrall, Ashley P.; Kurama, Yahya C.
- Abstract
This paper investigates the effect of moment-to-shear ratio and flanges on the behavior of squat reinforced concrete (RC) shear walls with high-strength materials. Pseudo-static, reversed-cyclic lateral load behavior of three squat walls--two rectangular walls with uniform thickness and different moment-to-shear ratios, and one I-shaped wall--are compared. The walls used high-strength reinforcement (fy ≈ 850 MPa [123 ksi]), high-strength concrete (fc' ≈ 100 MPa [14.5 ksi]), and the same uniformly distributed vertical and horizontal web reinforcement ratio, ρsw ≈ 0.83%. It is shown that: 1) squat rectangular walls without boundary regions can develop flexural failure, especially when using highstrength concrete; 2) the addition of flange regions at the wall ends increases shear-critical behaviors, such as increased shear deformations, steeper diagonal cracks, and crushing in the wall web; 3) web regions in flanged walls with high-strength concrete can have greater capacity than current ACI limits for normalized shear stress; and 4) current ACI (318-19 and 349-13) and ASCE/SEI (43-05) nominal lateral strength equations and relevant commentaries for squat walls may need to be updated to include the effects of moment-to-shear ratio, flanges, and high-strength materials.
- Subjects
AMERICAN Society of Civil Engineers; SHEAR walls; CONCRETE walls; REINFORCED concrete; STRENGTH of materials; FLANGES; LATERAL loads
- Publication
ACI Structural Journal, 2020, Vol 117, Issue 5, p283
- ISSN
0889-3241
- Publication type
Article
- DOI
10.14359/51725845