Finite Element Analysis on Concrete Filled Steel Tubular Concrete Beam Joints under Cyclic Loading by OPENSEES

Abstract:

Concrete filled steel tubular (CFST) column-beam joint with the column tube discontinuous in joint zone is a new type of joint. Firstly, the results of the cyclic loading experiments on this joint were introduced briefly. Then numerical simulation of the experiment process was carried out by OPENSEES, and the load-displacement curves, strength degradation, stiffness degradation of the specimens were studied. The analysis results exhibit good agreement with the experimental ones. OPENSEES can simulate two types of failure, including joint failure and beam failure. Based on specimen S3, parametric analysis were conducted to research the strength degradation and stiffness degradation in models with different reinforcement ratios and reinforcement diameters. The results indicate that models with higher reinforcement ratio of the beams will result in joint failure under cyclic reverse loading, and their load-displacement curves are pinched and ultimate bearing capacity would not increase while strength degradation and stiffness degradation would appear obviously.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 287-291
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.287
• Online since: May 2012
• Authors: Qing Jun Chen, Jin Long Guo, Jian Cai, An He, Xu Lin Tang, Chun Yang
• Keywords: Concrete Filled Steel Tubular (CFST), Cyclic Reversed Loading, Joint, OpenSEES, Stiffness Degradation, Strength Degradation

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[5] Information on http://opensees.berkeley.edu/