Temperature and Temperature Stress Analysis in Mass Concrete under Cold Environments of Strong Wind and Large Diurnal Temperature Range

doi:10.1155/2022/3064754

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Temperature and Temperature Stress Analysis in Mass Concrete under Cold Environments of Strong Wind and Large Diurnal Temperature Range
	Wang, Guoqing 1; He, Meng 1; Zhou, Canjun 1; Xie, Wen 1; Liu, Xinglin 1; Chen, Jin 1; Liu, Hua 1; Lei, Bingbing 2,3; Zhang, Mingli 2,3
刊名	GEOFLUIDS
	2022-05-16
卷号	2022
ISSN号	1468-8115
DOI	10.1155/2022/3064754
英文摘要	Special environmental condition with strong wind and large diurnal temperature range is not conducive for the control of crack development during the curing of mass concrete in the cold environment of Northwest China. In this study, the temperature at four measured points along the vertical profile of a mass concrete was measured over 14 days. Then, a thermal-mechanical model with the optimized initial condition, thermal parameters, boundary conditions, and the effects of rebar on temperature stress of concrete was built. Based on the observations and numerical model, the effects of environmental factor on the peak temperature, temperature fluctuation amplitude, and maximum temperature stress of the mass concrete are analyzed. The result showed that increasing wind speed can reduce the temperature of the concrete, but an opposite result is observed with increase in diurnal temperature range. Moreover, the more obvious diurnal variation of concrete temperature with the increase in wind speed and diurnal temperature range is not conducive to the thermal stability of the structure, especially for horizontal and side surfaces. Accordingly, increasing wind speed and diurnal temperature range will increase the peak temperature stress of the concrete and the overall stress level. Strong wind and large diurnal temperature range significantly increase the temperature stress and its duration for the side surface. The high temperature stress and intensive daily variation of temperature stress at the horizontal surface affect the durability of the concrete material. Therefore, the temperature stresses of the horizontal surface under wind speed levels 3, 4, 5, and 1.25 times large diurnal temperature range easily exceed the tensile strength; then, the temperature crack will appear. Combined with the research results, the temperature control and crack prevention measures are proposed under the condition of ensuring concrete strength. The study will further guide the improvement and optimization of mass concrete construction in an extreme environment.
WOS研究方向	Geochemistry & Geophysics ; Geology
语种	英语
出版者	WILEY-HINDAWI
WOS记录号	WOS:000806019000005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158663]
专题	土木工程学院
作者单位	1.China Nucl Ind Huachen Construct Engn Co Ltd, Xian 712000, Shaanxi, Peoples R China; 2.Lanzhou Univ Technol, Western Civil Engn Res Ctr Disaster Prevent & Mit, Minist Educ, Lanzhou 730050, Gansu, Peoples R China 3.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730000, Gansu, Peoples R China;
推荐引用方式 GB/T 7714	Wang, Guoqing,He, Meng,Zhou, Canjun,et al. Temperature and Temperature Stress Analysis in Mass Concrete under Cold Environments of Strong Wind and Large Diurnal Temperature Range[J]. GEOFLUIDS,2022,2022.
APA	Wang, Guoqing.,He, Meng.,Zhou, Canjun.,Xie, Wen.,Liu, Xinglin.,...&Zhang, Mingli.(2022).Temperature and Temperature Stress Analysis in Mass Concrete under Cold Environments of Strong Wind and Large Diurnal Temperature Range.GEOFLUIDS,2022.
MLA	Wang, Guoqing,et al."Temperature and Temperature Stress Analysis in Mass Concrete under Cold Environments of Strong Wind and Large Diurnal Temperature Range".GEOFLUIDS 2022(2022).