Centrifuge modelling of ultra-thin High Strength Steel Fibre Reinforced Concrete Pavements

IF 1.2 4区工程技术 Q4 ENGINEERING, GEOLOGICAL

International Journal of Physical Modelling in Geotechnics Pub Date : 2022-04-19 DOI:10.1680/jphmg.21.00011

M. S. Smit, E. Kearsley

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引用次数: 1

Abstract

Ultra-Thin Continuously Reinforced Concrete Pavements (UTCRCP) is an innovative pavement type that consists of a 50 mm High Strength Steel Fibre Reinforced Concrete (HS-SFRC) layer overlain on a pavement substructure. The thickness results in a flexural stiffness significantly smaller than for conventional concrete pavements. In this paper, the conceptual understanding of the response of UTCRCP to traffic loading was investigated using centrifuge modelling. Simplified pavement models were subjected to a bidirectional moving axle load. The results indicated that axle loading, and not single wheel loading, should be used to investigate the response of UTCRCP as there is significant interaction in substructure deformation caused by the wheels on the ends of an axle. Due to the flexural toughness of the highly reinforced concrete layer, a gap forms between the ultra-thin HS-SFCR overlay and its substructure. Brittle, cemented bases between the HS-SFRC overlay and subgrade should be used with caution, as the flexible nature of the layers above and below the stabilized layer may result in rapid degeneration of the brittle layer.

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超薄高强度钢纤维混凝土路面的离心建模

超薄连续钢筋混凝土路面(UTCRCP)是一种创新的路面类型，由覆盖在路面下层结构上的50毫米高强度钢纤维增强混凝土(HS-SFRC)层组成。厚度导致弯曲刚度明显小于传统的混凝土路面。本文采用离心模型研究了UTCRCP对交通荷载响应的概念理解。简化路面模型承受双向移动轴载荷。结果表明，由于轮轴两端的车轮引起的子结构变形存在显著的相互作用，因此应采用轴载荷而不是单轮载荷来研究UTCRCP的响应。由于高钢筋混凝土层的抗弯韧性，超薄HS-SFCR覆盖层与其下部结构之间形成间隙。HS-SFRC加铺层与路基之间的脆性胶结基层应谨慎使用，因为稳定层上下各层的柔韧性可能导致脆性层迅速退化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Physical Modelling in Geotechnics ENGINEERING, GEOLOGICAL-

CiteScore

3.60

自引率

15.80%

发文量

期刊介绍： International Journal of Physical Modelling in Geotechnics contains the latest research and analysis in all areas of physical modelling at any scale, including modelling at single gravity and at multiple gravities on a centrifuge, shaking table and pressure chamber testing and geoenvironmental experiments.