大尺寸RPC管-HSC组合柱轴压性能试验研究<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.023.013

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Abstract Concrete-filled reactive powder concrete tube (CFRT) is an innovative composite structure based on confinement effect. Reactive powder concrete (RPC) tube filled with high-strength concrete (HSC) core, named RPC-HSC composite column, was investigated in this work. The mixture ratio of RPC for precast spun tube were investigated and all RPC tubes in the test were manufactured by spinning process in factory. Axial compression tests were carried out on 4 groups of large-scale CFRT columns and one group of steel-confined HSC columns. The results showed that in the whole compression process, the RPC tube of CFRT column with inner HSC was in good condition, and displayed better compression performance than the control columns. The increment of inner concrete's strength led to increasing compressive strength of the CFRT column, but a gradually decline of the confinement effect, which suggested the necessity of strength limitation on the internal concrete for CFRT column. The longitudinal reinforcement in the inner concrete has little effect on the ductility of the CFRT columns. Based on the Mander (1988) model, we proposed a calculation method for the carrying capacity of CFRT column filled with HSC, and the predictions by this method coincided well with the experimental results.

Key words： reactive powder concrete (RPC) high-strength concrete (HSC) confinement composite column axial compression performance

Published: 10 December 2017 Online: 2018-05-08

CLC number:

TU398+.9

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	SHAN Bo
	LAI Dade
	LIU Fucai

Cite this article:

SHAN Bo,LAI Dade,LIU Fucai. Experimental Research on Axial Compression Performance of Large-scale HSC-filled RPC Tube[J]. Materials Reports, 2017, 31(23): 96-102.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.013 OR https://www.mater-rep.com/EN/Y2017/V31/I23/96

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