Experimental Research on Mechanical Properties of UHPC-RC Composite Columns Under Eccentric Compression

LIU Lei; HE Zhen; WANG Peng; CAI Xinhua; MENG Fanbing; LUO Tao

doi:10.13204/j.gyjzG22051009

Volume 54 Issue 3

Mar. 2024

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LIU Lei, HE Zhen, WANG Peng, CAI Xinhua, MENG Fanbing, LUO Tao. Experimental Research on Mechanical Properties of UHPC-RC Composite Columns Under Eccentric Compression[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(3): 153-160. doi: 10.13204/j.gyjzG22051009

Citation:

LIU Lei, HE Zhen, WANG Peng, CAI Xinhua, MENG Fanbing, LUO Tao. Experimental Research on Mechanical Properties of UHPC-RC Composite Columns Under Eccentric Compression[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(3): 153-160. doi: 10.13204/j.gyjzG22051009

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Experimental Research on Mechanical Properties of UHPC-RC Composite Columns Under Eccentric Compression

doi: 10.13204/j.gyjzG22051009

LIU Lei^1,2,
HE Zhen^{1,3
,
,},
WANG Peng⁴,
CAI Xinhua¹,
MENG Fanbing⁴,
LUO Tao⁴

1. State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430072, China;
2. Shandong Chunhe New Materials Research Inst. Co., Ltd., Rizhao 276800, China;
3. School of Intelligent Construction, Wuchang University of Technology, Wuhan 430040, China;
4. College of Civil Engineering, Xijing University, Xi'an 710123, China

Received Date: 2022-05-10
Available Online: 2024-05-29

Abstract

Abstract

Eight UHPC-RC (ultra-high performance concrete-reinforced concrete) composite columns (including two RC contrast columns) were fabricated by using ultra-high performance concrete (UHPC) to replace certain thickness of ordinary concrete on the tensile zone of reinforced concrete (RC) columns. The influence of eccentricity, UHPC layer thickness and UHPC layers with or without steel bars on cracking performance, ultimate bearing capacity and ductility of composite columns was studied. The results showed that UHPC layers significantly improved the crack resistance of RC columns, delayed the occurrence of cracks to different degrees, and presented the typical multi-cracks on the tensile side of UHPC-RC composite columns. The ultimate bearing capacity and ductility of UHPC-RC composite columns were improved to various extends, with the increase of UHPC layer thickness and combination of UHPC layers and steel reinforcing bars (R-UHPC). The formula of calculating the ultimate bearing capacity of UHPC-RC composite columns was proposed, and it showed a good agreement between the calculated values and the experimental results.
- ultra-high performance concrete(UHPC),
- composite column,
- eccentric compression,
- crack resistance,
- ultimate bearing capacity

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References(20)

References

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