|Table of Contents|

Study on axial compression ratio limit of concrete-filled steel tubular composite column with T-shaped steel flange(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年03期
Page:
76-85
Research Field:
建筑结构
Publishing date:

Info

Title:
Study on axial compression ratio limit of concrete-filled steel tubular composite column with T-shaped steel flange
Author(s):
GAO Liang1;  WANG Peng2;  ZHANG Peng2
(1. School of Management Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China; 2. College of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China)
Keywords:
composite column;  ductility performance;  numerical simulation;  theoretical calculation;  axial compression ratio limit
PACS:
TU398
DOI:
10.19815/j.jace.2022.05049
Abstract:
In order to fully utilize the deformation performance of concrete-filled steel tubular composite column with T-shaped steel flanges(T-CFST column)and ensure that the columns can meet the ductility requirements under seismic action, the ductility and axial compression ratio limits of the T-CFST columns were investigated by theoretical derivation and numerical simulation. Based on the critical failure state between large eccentricity failure and small eccentricity failure, the formulas for calculating standard axial compression ratio and design axial compression ratio of T-CFST column was proposed. Based on the ABAQUS software, a refined finite element model of the T-CFST column was established. After verifying the accuracy of the finite element model, the influence of various influencing factors on the ductility of composite columns under high axial compression ratio was studied. The design axial compression ratio limits of composite columns under various steel ratios, steel strength and concrete strength were suggested. The results show that the ductility of T-CFST column increases with the decrease of concrete strength, the decrease of section steel ratio, the increase of steel strength and the increase of volume hoop ratio. Even at a large axial compression ratio, the ductility of the column is still good, and the limit of the axial compression ratio of the T-CFST column is allowed to be increased on the basis of calculation.

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Last Update: 2024-05-20