环境温度变化对混凝土徐变的影响

Z. Kammouna
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引用次数: 0

摘要

本文综述了温度对混凝土徐变影响的研究进展。事实上,温度是最重要的因素之一,因为温度的升高会导致混凝土的徐变加速,因此与常温下的混凝土相比,其徐变值会增加。然而,如果混凝土在荷载下暴露在高温下,徐变会显著增加。因此,其徐变值高于(同一水平)恒温混凝土的徐变值。不幸的是,一些用于预测混凝土徐变的规范(例如欧洲规范)没有考虑到高温对混凝土在荷载作用下徐变的影响。为了阐明在荷载下加热混凝土(对徐变)的影响,并将其与恒定时的影响区分开来,进行了这项研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Change in Ambient Temperature on Creep of Concrete
This article reviews the studies on the effect of temperature on the creep of concrete. Indeed, the temperature is one of the most important factors, as its rise leads to an acceleration of creep of concrete and thus an increase in its value compared to concrete under normal temperature. However, creep increases significantly if concrete under load is exposed to a high temperature. Thus, the creep value becomes higher than that of concrete exposed to a constant temperature (of the same level). Unfortunately, some of the codes for predicting creep of concrete (for instance the Eurocode) do not take into account the effect of high temperature on the creep of concrete under load. To clarify the impact of heating concrete under load (on creep) and distinguish it from its effect where it is constant, this study was carried out.
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