Title:
Biaxial Interaction and Load Contour Method of Reinforced Concrete T-Shaped Structural Walls
Author(s):
Tae-Sung Eom, Hye-Sung Nam, and Su-Min Kang
Publication:
Structural Journal
Volume:
115
Issue:
1
Appears on pages(s):
151-161
Keywords:
biaxial interaction; biaxially loaded walls; load contour method; reinforced concrete; structural wall; T-shaped walls
DOI:
10.14359/51700917
Date:
1/1/2018
Abstract:
Reinforced concrete structural walls with T-shaped cross sections (or T-shaped walls) have been used as an efficient lateral force-resisting system for building structures. Such T-shaped walls are subjected to axial compression and combined bending moments about two orthogonal axes. In the present study, a straightforward design method for biaxially loaded T-shaped walls is developed by modifying the existing load contour method. First, a strain compatibility section analysis method that can estimate the biaxial bending resistances of arbitrary wall sections is developed and its validity is verified through comparisons with test results. Then, a parametric study is performed to investigate the interaction of biaxial moments at a constant axial load in T-shaped walls. The parametric results show that, due to the unsymmetrical geometry of T-shaped sections, the biaxial interaction depends significantly on the direction of moments and the magnitude of axial compression. Based on the results, the non-dimensional contour equations of biaxial moments for T-shaped walls are proposed and a design procedure of T-shaped walls is established.