Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 76, Number 3, November10 2020 , pages 337-354 DOI: https://doi.org/10.12989/sem.2020.76.3.337 |
|
|
|
Main factors determining the shear behavior of interior RC beam-column joints |
||
Ricardo Costa and Paulo Providência
|
||
| Abstract | ||
| Reinforced concrete beam-column (RCBC) joints of laterally loaded unbraced frames are sometimes controlled by their shear behavior. This behavior relies on multiple and interdependent complex mechanisms. There are already several studies on the influence of some parameters on the shear strength of reinforced concrete joints. However, there are no studies methodically tackling all the most relevant parameters and quantifying their influence on the overall joint behavior, not just on its shear strength. Hence, considering the prohibitive cost of a comprehensive parametric experimental investigation, a nonlinear finite element analysis (NLFEA) was undertaken to identify the key factors affecting the shear behavior of such joints and quantify their influence. The paper presents and discusses the models employed in this NLFEA and the procedure used to deduce the joint behavior from the NLFEA results. Three alternative, or complementary, quantities related to shear are considered when comparing results, namely, the maximum shear stress supported by the joint, the secant shear stiffness at maximum shear stress and the secant shear stiffness in service conditions. Depending on which of these is considered, the lower or higher the relevance of each of the six parameters investigated: transverse reinforcement in the joint, intermediate longitudinal bars and diagonal bars in the column, concrete strength, column axial load and confining elements in transverse direction. | ||
| Key Words | ||
| reinforced concrete; beam-column joint; shear behavior; finite element method | ||
| Address | ||
| Ricardo Costa: Department of Civil Engineering, University of Coimbra, ISISE, Rua Luis Reis Santos, 3030-788, Coimbra, Portugal Paulo Providência: University of Coimbra, INESC Coimbra, DEC, 3030-290, Coimbra, Portugal | ||