Title:
Lateral Stiffness of Concrete Shear Walls for Tall Buildings
Author(s):
Ahmad Rahimian
Publication:
Structural Journal
Volume:
108
Issue:
6
Appears on pages(s):
755-765
Keywords:
cracking; effective stiffness; tension stiffening; wall; wind
DOI:
10.14359/51683374
Date:
11/1/2011
Abstract:
The present ACI 318-11 code provisions on the effective stiffness of shear wall, as well as several other standards and technical papers, are reviewed. A series of nonlinear analyses are performed for shear wall under wind and gravity loading considering well-known constitutive relations for concrete, including the tension-stiffening behavior. The results are compared with ACI 318-11 and other references. It is demonstrated that the ACI provisions for shear walls can be overly conservative for a range of behavior typical of wind loading. Two methods and formulas are proposed for the effective stiffness of shear wall suitable for design office practice. The proposed methods are capable of predicting the effective stiffness of the shear walls for different loading intensities, as could be related to serviceability or ultimate states. This could facilitate the performance-based design of shear wall structures under wind loading.