American Society of Civil Engineers


Laboratory Test and Numerical Simulation of Time-Dependent Thermomechanical Behavior of the Three-Gorges Dam


by Jian Liu, Ph.D., (corresponding author), (Professor, State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Xiaohongshan, Wuchang District, Wuhan 430071, People’s Republic of China; and, Senior Engineer, Yangtze River Scientific Research Institute, Wuhan 430010, People’s Republic of China E-mail: jliu@whrsm.ac.cn), Liping Qiao, Ph.D., (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Xiaohongshan, Wuhan 430071, People’s Republic of China.), Pujian Li, (Senior Engineer, Northwest Investigation Design and Research Institute, China Hydropower Engineering Consulting Group Corporation, Xi’an 710065, People’s Republic of China.), and Chun-Fang Dai, (Senior Engineer, Yangtze River Scientific Research Institute, Wuhan 430010, People’s Republic of China.)

Journal of Materials in Civil Engineering, Vol. 22, No. 2, February 2010, pp. 111-123, (doi:  http://dx.doi.org/10.1061/(ASCE)0899-1561(2010)22:2(111))

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Document type: Journal Paper
Abstract: The evaluation on the risk of thermal-induced cracking is among the key issues in the design and construction of the Three-Gorges Dam. The time-dependent thermomechanical behavior of the left guide-wall section of the dam is systematically studied. A series of laboratory tests on the concrete thermomechanical properties are conducted. A three-dimensional finite element code is developed for calculating the evolutionary temperature and stress field of the dam. The time-dependent thermomechanical properties of concrete, detailed construction procedures, variations of environmental temperature, and the effects of water cooling are taken into account in this code. The distribution and evolution of temperature and thermal stress of the dam are derived. The superimposed effects of thermal load, self-weight, and external water pressure are discussed. The results indicate that the thermal tensile stresses can be largely counteracted by the compressive stresses due to self-weight. There is very little cracking potential after reservoir filling. Nevertheless, during the construction, large tensile stresses can be locally caused; accordingly, some significant suggestions for the thermal stress and temperature control of the dam are presented.


ASCE Subject Headings:
Dams
China
Thermal factors
Creep
Concrete
Laboratory tests
Simulation

Author Keywords:
Three-Gorges Dam
Thermomechanic behavior
Concrete creep
Laboratory tests
Numerical simulation