Vol. 3,No. 7, July 2013
Author(s): Siamak.Ahmadi Fard, Amin Bagheban Zade Dezfouli
Abstract: Variations in temperature and their resulting stress and strain on concrete dams is of vital importance because of their effects on sustainability and operational efficiency of these hydraulic structures under arid and semi-arid conditions. The influence of temperature on dynamic behavior of the double-arced concrete dams for instance, is shown to have a direct impact on the thermo-elasticity characteristics of the mixed concrete and the constituting materials in the concrete. Because of these factors the present paper investigates the effects of variation in air temperature on dynamic behavior of these structures based on the data obtained from the precision tools incorporated in the system. Results showed a higher temperature at the upper water height than the deeper water bodies and as such, the size of the cracks greater than the lower depth. For this reason, data obtained from the dilatometer tools shown more drainage of water from the cracks at the upper than the lower level. Results further indicated a variation in the dam configuration at upstream due to higher temperature during summer on one hand and further variation at downstream during winter season. Research shown the vital importance of the precision tools in identifying the effects of components such as variations in temperature and seepage rate in the sustainability of these structures on one hand and their operational efficiency aimed at optimum utilization of the renewable water resources on the other.
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