|Table of Contents|

Experiment on Eccentric Compressive Behaviors of Square CFST Columns with Built-in High-strength Steel Angles(PDF)

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

Issue:
2021年02期
Page:
16-25
Research Field:
Publishing date:

Info

Title:
Experiment on Eccentric Compressive Behaviors of Square CFST Columns with Built-in High-strength Steel Angles
Author(s):
WU Bo;  WANG Hui;  LIU Xiao-zhu
State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong, China
Keywords:
square concrete-filled steel tubular column;  high-strength steel angle;  eccentric compression behavior;  replacement ratio of steel;  eccentric distance
PACS:
TU398
DOI:
10.19815/j.jace.2021.02023
Abstract:
In order to clarify the eccentric compression behaviors of square concrete-filled steel tubular(CFST)columns with built-in high-strength steel angles, eight such columns and two traditional steel tubular columns filled with concrete were tested under eccentric compression. The effects of the replacement ratio of steel(the mass ratio of the steel angles to the total steel usage), the clear distance between the steel angle and the steel tube, and the eccentric distance on the eccentric compression behaviors of the columns were investigated, and the calculation method of the eccentric load bearing capacity of the square CFST column with built-in high-strength steel angles was discussed. The results show that when the total steel consumption remains unchanged, through reasonable selection of both the replacement ratio of steel and the clear distance between the steel angle and the steel tube, the eccentric compressive behaviors of the square CFST column with built-in high-strength steel angle is similar to that of the traditional CFST column under eccentric load. Compared with the replacement ratio of steel, the clear distance between the steel angle and the steel tube has greater influence on the eccentric load bearing capacity of the square CFST column with built-in high-strength steel angles. When the total steel usage keeps unchanged, the equivalent stiffness and ductility of the square CFST column with built-in high-strength steel angles are close to those of the traditional square CFST column. When the square CFST columns with built-in high-strength steel angles reach their eccentric peak loads, the high-strength steel angles in the compression or(and)the tension zones have fully exerted their strength. The improved calculation method of the eccentric load bearing capacity of the square CFST column with built-in high-strength steel angles can predict the peak load well on the whole.

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Last Update: 2021-03-20