Title:
Deformability of Reinforced Concrete Beam-Column Joints Considering Strain Penetration Effect
Author(s):
Jung-Yoon Lee, Muhammad Haroon, and Jongwook Park
Publication:
Structural Journal
Volume:
119
Issue:
4
Appears on pages(s):
51-68
Keywords:
joint deformability; potential shear strength; reinforced concrete (RC) joints; strain penetration
DOI:
10.14359/51734648
Date:
7/1/2022
Abstract:
The potential shear strength of joint panels deteriorates due to the so-called “strain penetration effect” from the beam plastic hinges. This strength reduction may cause an unexpected brittle shear failure of joints before the adjacent beams reach the intended ductility level. In this study, reinforced concrete (RC) joint assemblies are experimentally investigated to evaluate the deformability of joints considering joint shear deterioration. Additionally, a deformation capacity model is developed for joint assemblies failing in shear after beam plastic hinge formation. The proposed method accounts for the joint shear deterioration due to axial strain penetration from the beam plastic hinges. Finally, the accuracy of the proposed method is verified against a large experimental database consisting of specimens tested in this study and others reported in the literature. The experimental and analytical deformation capacity results show reasonable agreement.
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