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ISSN 2063-5346
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NUMERICAL ANALYSIS OF BEARING CAPACITY OF CONCRETE-FILLED STEEL TUBE COLUMNS UNDER AXIAL COMPRESSIVE LOADS USING THREE-DIMENSIONAL NONLINEAR FINITE ELEMENT MODELS

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Nguyen Huu Quang, Bui Long Vinh
» doi: 10.31838/ecb/2023.12.s3.281

Abstract

The bearing capacity of Concrete-filled steel tube (CFST) is a critical factor that primarily depends on the constituent materials' properties. The confinement effect of the steel pipe on the concrete core, as well as the geometrical properties of the pipe, such as the cross-section and the column width to the thickness of the steel pipe, significantly affects the column's behavior. To improve the understanding of CFST columns' mechanical behavior and effectively utilize high-strength concrete, this study uses ABAQUS software to analyze the bearing capacity of CFST columns under the effect of axial compressive loads. Three-dimensional nonlinear finite element models were constructed, and numerical analysis was performed to investigate the center bearing capacity of short column CFST under a centered load. This study represents a novel approach to analyzing the bearing capacity of CFST concrete-filled steel pipe columns and contributes to the current state of art in the field.

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