UHPC中纤维间距折减效应试验与模拟研究

doi:10.11896/cldb.24070154

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Abstract In order to further study the interfacial performance between fiber and ultra-high performance concrete(UHPC), the fiber pull-out test was carried out and the finite element model of the double fiber pull-out test was established by using the software ABAQUS. The pull-out process of steel fiber from UHPC matrix was numerically simulated. On the basis of verifying the validity and rationality of the finite element model, the parameter analysis was carried out, and the influence of the embedded spacing of steel fiber on the interface performance between fiber and UHPC matrix was emphatically studied. The spacing reduction effect, the maximum spacing reduction rate and the suitable spacing are proposed. Finally, the calculation formula of interfacial peak bond strength was obtained according to the results. The results show that with the increase of embedding spacing, the pull-out work and peak pull-out stress show an upward trend, and the peak pull-out force of different embedding depths and steel fiber diameters increases first and then develops approximately horizontally. The suitable spacing value and the maximum spacing reduction rate increase with the increase of steel fiber diameter and embedding depth. When the embedded spacing of steel fiber is less than the suitable spacing and gradually becomes smaller, the interfacial peak bonding strength between steel fiber with different lengths and diameters and the matrix is approximately linearly decreasing.

Key words： ultra-high performance concrete(UHPC) interfacial performance numerical simulation spacing reduction effect suitable spacing

Published: 25 July 2025 Online: 2025-07-29

CLC number:

TU528

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	Articles by authors
	YANG Yu
	HUANG Bin
	HUANG Wei
	GONG Mingzi
	PAN Axin
	CHEN Qingfeng
	CHEN Baochun
	WEI Jiangang

Cite this article:

YANG Yu,HUANG Bin,HUANG Wei, et al. Experimental and Simulation Study on Fiber Spacing Reduction Effect in UHPC[J]. Materials Reports, 2025, 39(14): 24070154-8.

URL:

https://www.mater-rep.com/EN/10.11896/cldb.24070154 OR https://www.mater-rep.com/EN/Y2025/V39/I14/24070154

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