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首页> 外文期刊>Magazine of Concrete Research >Analysis of shrinkage-induced stresses in concrete pavements
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Analysis of shrinkage-induced stresses in concrete pavements

机译：混凝土路面收缩引起的应力分析

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摘要

In this paper, the effect of pavement material properties as well as slab-base interfacial characteristics on the shrinkage-induced stresses in concrete pavements is investigated by application of an analytical shrinkage stress model. The model is based on the interfacial friction stress transmitted between slab and base when concrete shrinks. A bilinear model describing the frictional stress-slippage behaviour of a slab—base interface is adopted in the modelling. By model calculations, the influences of the time-dependent material parameters, such as shrinkage strain, elastic modulus and strength of concrete, as well as the time-independent parameters such as slab-base Interfacial characteristics and slab length, on the development of shrinkage-induced stresses in concrete pavements are analysed. The closed-form expression of the minimum slab length or transverse crack spacing based on the assumption that the maximum shrinkage stress in the slab falls below the tensile strength of concrete under a given concrete tensile strength and shrinkage strain is obtained. The minimum shrinkage strain and the minimum slab length required to crack the concrete pavements are provided.
机译：本文通过分析收缩应力模型研究了铺装材料性能以及板基界面特性对混凝土路面收缩引起的应力的影响。该模型基于混凝土收缩时板与基底之间传递的界面摩擦应力。在建模中采用了描述板-基础界面的摩擦应力-滑移行为的双线性模型。通过模型计算，随时间变化的材料参数（如收缩应变，混凝土的弹性模量和强度）以及随时间变化的参数（如板基界面特性和板长）对收缩率的影响分析了混凝土路面中的应力。在给定的混凝土抗拉强度和收缩应变的条件下，假设板中的最大收缩应力低于混凝土的抗拉强度，就可以得出最小板长度或横向裂缝间距的闭合形式。提供了使混凝土路面开裂所需的最小收缩应变和最小平板长度。

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  • 来源
    《Magazine of Concrete Research》 |2004年第10期|p.585-595|共11页
  • 作者

    J. Zhang; B. Leng;

  • 作者单位

    Department of Civil Engineering, Tsinghua Univiversity, Beijing, 100084, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 水泥工业;
  • 关键词

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