文章基本信息

标题：Thermal effect of mass concrete structures in the tropics: Experimental, modelling and parametric studies
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作者：Herbert Abeka ; Stephen Agyeman ; Mark Adom-Asamoah 等
期刊名称：Cogent Engineering
电子版ISSN：2331-1916
出版年度：2017
卷号：4
期号：1
页码：1278297
DOI：10.1080/23311916.2016.1278297
语种：English
出版社：Taylor and Francis Ltd
摘要：Abstract This paper is an experimental investigation and analytical simulation of thermal effects on mass concrete structures in the tropics. A study of the temperature rise of a 1.1 m × 1.1 m × 1.1 m experimental mass concrete block, well instrumented with thermocouples to monitor the temperatures distribution was performed. A validated finite element model was used to predict the temperature development of the hydrating experimental mass concrete block. Thermal stress analysis was performed to give an estimate of stresses induced by the thermal gradient of the concrete block section and the crack index was used to quantify the probability of thermal cracking. A parametric study on the effect of the surface area to volume ratio (SVR) of mass concrete was performed to quantify the maximum allowable thermal gradient as well as the induced thermal stresses that may cause thermal cracks. For SVR less than 0.36, thermal cracks may occur at early ages of concrete strength development in the tropics.
关键词：mass concrete ; hydration ; temperature ; thermal cracks ; finite element model