|Table of Contents|

Experimental study on axial compression performance of concrete short columns with hollow sandwich steel jacketed aluminum tubes(PDF)

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

Issue:
2023年06期
Page:
35-44
Research Field:
建筑结构
Publishing date:

Info

Title:
Experimental study on axial compression performance of concrete short columns with hollow sandwich steel jacketed aluminum tubes
Author(s):
LI Bing;  TIAN Liming;  ZHOU Bo
(School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China)
Keywords:
composite structure;  hollow sandwich steel jacketed aluminum tube concrete;  short column;  axial compression test;  load capacity calculation
PACS:
TU312
DOI:
10.19815/j.jace.2021.12082
Abstract:
In order to study the axial compression performance of concrete short columns with hollow sandwich steel jacketed aluminum tubes, an axial compression test on eight members by varying the parameters was carried out. The axial compression test was conducted on components with hollow ratios of 0.38, 0.51, 0.78, concrete strength of ordinary concrete C30 and lightweight concrete C30, and inner aluminum alloy tube thickness of 5 mm and 3 mm. Based on the axial compression load capacity formula of the concrete short column of hollow sandwich steel tube, the restraint effect coefficient in the formula was modified, and finally a better fitting formula for the calculation of the axial compression load capacity of the concrete short column with hollow sandwich steel jacketed aluminum tube was derived. The results show that the failure mode of the component is bulging at the middle or end of the span, with the outer steel pipe bulging outward, the core concrete being crushed, and the inner aluminum alloy tube sinking inward. The ultimate load capacity of the members with hollow ratio of 0.78 and 0.51 is increased by 29% and 19% respectively compared with the members with hollow ratio of 0.38, and the ultimate load capacity of ordinary concrete members is increased by 60% compared with that of lightweight concrete members. The load capacity of members with inner pipe wall thickness of 5 mm is increased by about 2% compared with that of members with inner pipe wall thickness of 3 mm. The load bearing capacity of the member increases with the decrease of the hollow ratio, the increase of the concrete strength grade and the increase of the inner aluminum alloy tube thickness.

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Last Update: 2023-12-01