Axial compression behaviour of reinforced short UHPFRC columns confined by spirals: Experimental tests and constitutive models

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-03-24 DOI:10.1016/j.istruc.2025.108742

Dan-Dan Wang , Xin-Yu Zhao , Yi Chen , Shu-Rong Zhou , Shao-Bo Kang

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引用次数: 0

Abstract

This paper presents experimental and analytical studies on axial compression behaviour of reinforced short ultra-high-performance fibre-reinforced concrete (UHPFRC) columns confined by spirals. In the experimental programme, a total of 26 short columns with a height-diameter ratio of 4.5 were tested under axial compression. The load capacity, failure mode, ductility index, and strains of longitudinal reinforcement and spirals were obtained, and the influences of diameter and spacing of spirals, volumetric ratio of spirals, and steel fibres on ultimate stress and strain of columns were analysed in depth. Based on the experimental results, the constitutive model for confined UHPFRC by spirals is modified to take account of the effects of spirals on the compressive strength and ultimate strain. Comparisons between experimental results and calculated results using the modified model show that the modified model can predict the compressive stress-axial strain curve of confined UHPFRC columns with good accuracy.

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.