Cyclic Behavior of Concrete-Filled Tube Columns with Bidirectional Moment Connections Considering the Local Slenderness Effect

In this research, the cyclic behavior of concrete-filled thin tube (CFTT) columns with bidirectional moment connections was numerically studied within the context of thin-walled structures. Novel considerations in the design of CFTT columns with slenderness sections are proposed through a parametric...

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Bibliographic Details
Published in:Buildings (Basel) 2024-07, Vol.14 (7), p.2240
Main Authors: Mata, Ramón, Nuñez, Eduardo
Format: Article
Language:English
Subjects:
bidirectional effect
CFTT columns
Columns (structural)
Comparative analysis
Computer software industry
Concrete
Configuration management
cyclic behavior
Cyclic loads
Damage assessment
Drift
Ductility
Ductility tests
Earthquake damage
Earthquakes
Experimental research
Failure mechanisms
Finite element analysis
finite element method
Flexural strength
Mathematical models
Plastic properties
Plasticity
Ratios
Slenderness ratio
steel moment connection
Thin wall structures
Tsunamis
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Summary:In this research, the cyclic behavior of concrete-filled thin tube (CFTT) columns with bidirectional moment connections was numerically studied within the context of thin-walled structures. Novel considerations in the design of CFTT columns with slenderness sections are proposed through a parametric study. A total of 70 high-fidelity finite element (FE) models are developed using ANSYS software v2022 calibrated from experimental research using similar 3D joint configurations. Furthermore, a comparison of different width-to-thickness ratios in columns was considered. The results showed that the models with a high slenderness ratio reached a stable cyclic behavior until 0.03 rad of drift, and a flexural strength of 0.8 Mp was reached for 4% of the drift ratio according to the Seismic Provisions. However, this effect slightly decreased the strength and the dissipated energy of the moment connection in comparison to columns with a high ductility ratio. Moreover, an evaluation of concrete damages shows concrete cracked for cyclic loads higher than 3% of drift. Finally, the joint configurations studied can achieve a good performance, avoiding brittle failure mechanisms and ensuring the plastic hinges in the beams.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14072240