Title:
Deformation-Based Strut-and-Tie Model for Interior Joints of Frames Subject to Load Reversal
Author(s):
Sung-Gul Hong, Soo-Gon Lee, and Thomas H.-K. Kang
Publication:
Structural Journal
Volume:
108
Issue:
4
Appears on pages(s):
423-433
Keywords:
frames; joints; load; strut-and-tie model
DOI:
10.14359/51682982
Date:
7/1/2011
Abstract:
This paper presents a strut-and-tie model for reinforced concrete (RC) interior beam-column joints to investigate shear strength degradation depending on the deformation of plastic hinges of adjacent beams. Two primary factors are considered in the development of a deformation-based strut-and-tie model: 1) shear force and moment transmitted from adjacent beams and columns; and 2) strain distribution of beam longitudinal bars within the joint. The bond stress distribution along the beam bars within the joint is used to depict appropriate force transfer patterns within the interior joint. Based on comparisons between the predicted values of strength and deformation capacity and test results from the literature, the proposed model successfully predicted the strengths and deformation capacities of interior beam-column subassemblages influenced by joint shear failure.