Laboratory Test and Numerical Simulation of Time-Dependent Thermomechanical Behavior of the Three-Gorges Dam
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 2
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.
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Acknowledgments
The paper has been financially supported by the Three-Gorges Development Corporation, Changjiang Water Resources Commission, the National Natural Science Foundation of China under Grant Nos. NNSFC40672192, NNSFC50479072, and NNSFC50539090, and Hubei Provincial Natural Science Foundation of China under Grant No. UNSPECIFIED2007ABB040. The writers wish to thank all colleagues in Yangtze River Scientific Research Institute, for their valuable contributions to various parts of the works described in the paper, particularly Professors Lin Shaozhong, Zhang Xixiang, Zhou Shouxian, and Senior Engineer Su Haidong, Xu Yuezhi.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 2 • February 2010
Pages: 111 - 123
Copyright
© 2010 ASCE.
History
Received: Nov 10, 2005
Accepted: Nov 5, 2008
Published online: Jan 15, 2010
Published in print: Feb 2010
Notes
Note. Associate Editor: Zhishen Wu
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