Evolution of Confinement Stress in Axially Loaded Concrete-Filled Steel Tube Stub Columns: Study on Enhancing Urban Building Efficiency

Mahdi Shariati (), Mahsa Pourteymuri, Morteza Naghipour, Ali Toghroli, Mohammad Afrazi, Morteza Shariati, Arman Aminian and Mahdi Nematzadeh
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Mahdi Shariati: Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
Mahsa Pourteymuri: Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol 4714871167, Iran
Morteza Naghipour: Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol 4714871167, Iran
Ali Toghroli: Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
Mohammad Afrazi: Mechanical Engineering Department, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Morteza Shariati: Department of Civil Engineering Discipline, School of Engineering, Monash University Malaysia, Bandar Sunway, Subang Jaya 47500, Malaysia
Arman Aminian: Department of Civil Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar 4741613534, Iran
Mahdi Nematzadeh: Department of Civil Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar 4741613534, Iran

Sustainability, 2024, vol. 16, issue 17, 1-23

Abstract: In the context of green building and sustainable urban development, understanding the mechanical behavior of structural components like concrete-filled steel tube (CFST) columns is crucial due to their improved load-bearing capacity, energy efficiency, and optimized material usage, which enhance structural resilience and sustainability. This research addresses the complex development of confining stress and its impact on the concrete core (CC) behavior within these columns, which are essential for urban infrastructure. Through extensive numerical studies, this study proposes a model to estimate the confining stress in axially loaded CFST short columns. Study findings reveal that the confinement effectiveness is influenced by variables such as compressive strength (CS) of the concrete, cross-sectional shape, and depth-to-wall thickness percentage. Additionally, the confinement is also significantly affected by the yield strain of steel ε y /ε c to the peak strain of unconfined concrete ε c . A three-dimensional finite element model (FEM) was built for the simulation of the columns’ nonlinear behavior and was rigorously validated against experimental data. This model aids in the design and implementation of more efficient and resilient urban structures, supporting the principles of sustainable construction. The study underscores the importance of structural integrity in sustainable urban development and provides valuable insights for improving the design of green building materials.

Keywords: sustainable construction; confining stress; finite element analysis; structural efficiency; urban development; green building materials (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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