|Table of Contents|

Calculation Method of Axial Bearing Capacity of Concrete-filled Square Steel Tubular Columns Reinforced by Inner Circular Steel Tube(PDF)

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

Issue:
2009年02期
Page:
63-67
Research Field:
Publishing date:
2009-06-20

Info

Title:
Calculation Method of Axial Bearing Capacity of Concrete-filled Square Steel Tubular Columns Reinforced by Inner Circular Steel Tube
Author(s):
ZHANG Zhi-quan1 ZHAO Sheng-min2 ZHANG Yu-fen1 WU Tao1
1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. The Eighth Building Engineering Co., Ltd. of Shaanxi Province, Xi'an 710068, Shaanxi, China
Keywords:
inner circular steel tube concrete-filled square steel tubular column axial compression ultimate bearing capacity diameter-to-thickness ratio
PACS:
TU312
DOI:
-
Abstract:
With consideration of the double confinement and the decrease of longitudinal stress because of the hoop tension, the ultimate stress of the inner and outer steel tube as well as the inner concrete under axial ultimate stress state were analyzed respectively. The bearing capacity of steel tube was calculated by using the twin shear unified strength theory and the theory of thin-wall cylinder, and the axial bearing capacity of concrete under three-direction compression was also got. Through analyzing that the axial bearing capacity of compound column was influenced by diameter-to-thickness ratio and diameter of inner circular steel tube, a comparison was conducted between the results of the bearing capacity of the concrete-filled square steel tubular columns and that reinforced by the inner circular steel tube. The results show that the axial bearing capacities of the compound column under axial compression agree well with the experimental results of reference. Strength contribution of the inner circular steel tube is that provides particular reinforcement for the inner concrete, so that the concrete-confined square steel tubular column reinforced by inner circular steel tube is greatly improved in mechanics behavior.

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Last Update: 2009-06-20