Experimental Research on Mechanical Properties of Prestressed Steel-timber Circular Column Under Axial Compression

WANG Yuhao; LIU Degui; WANG Ning; MA Jingjing

doi:10.13204/j.gyjzG20061012

Volume 52 Issue 1

Apr. 2022

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WANG Yuhao, LIU Degui, WANG Ning, MA Jingjing. Experimental Research on Mechanical Properties of Prestressed Steel-timber Circular Column Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(1): 39-46. doi: 10.13204/j.gyjzG20061012

Citation:

WANG Yuhao, LIU Degui, WANG Ning, MA Jingjing. Experimental Research on Mechanical Properties of Prestressed Steel-timber Circular Column Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(1): 39-46. doi: 10.13204/j.gyjzG20061012

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Experimental Research on Mechanical Properties of Prestressed Steel-timber Circular Column Under Axial Compression

doi: 10.13204/j.gyjzG20061012

1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Sichuan, Mianyang 621010, China;
2. Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang 621010, China

Received Date: 2020-06-10
Available Online: 2022-04-24

Abstract

Abstract

In order to improve the low bearing capacity, brittle failure and poor ductility of timber columns, the pre-stressed steel-timber circular column was proposed. The axial compression tests were carried out on the components, and the failure forms, failure modes, ductility index, load-displacement curves and load-strain curves of each specimen were obtained. The results showed that compared with the sum of ultimate load(P_max) of thin-walled steel cylinder and timber column, the ultimate load of the prestressed steel-timber circular column and the prestressed steel-timber circular column wrapped with CFRP increased by 16.12% and 24.49% respectively. Compared with the timber column, the ductility index(DI) increased by 268.73% and 340% respectively. The model of the prestressed steel-timber circular column was built by the finite element analysis software ABAQUS, and the load-displacement curve which was obtained by means of displacement loading was in good agreement with the test results. The finite elements analysis results showed that when the prestressing of lateral steel equalled 0.1,0.15 and 0.2 times of its tensile yield, the P_max increased obviously. The P_max would be reduced when the prestressing of lateral steel reached 0.25 times of its tensile yield, but it was still larger than the P_max of unstressed specimen. Confinement effect coefficient λ increased with the increase of pre-stressing of steel and use of CFRP sheets.
- prestressed steel-timber composite column,
- axial compression,
- mechanical properties,
- finite element simulating

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References(21)

References

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