A Study on Seismic Behavior of Reinforced Concrete Knee Joint in Opening and Closing Action

Author(s)

Muhammad Abul Kalam Azad ,

Download Full PDF Pages: 01-09 | Views: 578 | Downloads: 152 | DOI: 10.5281/zenodo.4399209

Volume 9 - December 2020 (12)

Abstract

The beam-column joint is considered as the essential zone in a reinforcement concrete moment-resisting frame. Among the beam-column joints, the knee joint at the roof level is the most crucial element of the structure as less confinement makes the knee joint behavior most challenging during an earthquake. The poor performance of the knee joint during an earthquake causes detrimental failure of the structure resulting in a motivating number of experimental investigations of knee joint behavior under reversed cyclic loading. Even it is true that all major seismic design codes all over the world do not have specific seismic design codes for beam-column knee joints. That’s why it becomes knee joint more crucial to be investigated to predict some important parameters for knee joint during a strong earthquake. In this paper three knee, joint specimens were conducted at the structural lab of The Hong Kong University of Science and Technology. The main goal of this study is to investigate the behavior of the knee joint under seismic excitation for both closing and opening action. Even hysteretic behavior and envelope curve have been studied to investigate joint performance. Consistent with observation, it can be seen that opening shear stress decreased with increasing the area ratio and becomes vice versa for closing shear stress

Keywords

knee joint; Earthquake; shear stress; Opening action and closing action

References

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