Hydraulic Engineering Print E-mail
Tuesday, 15 April 2014 16:56

EFFECT OF STATIC CYCLIC LOADING AND AGEING OF CONCRETE ON THE STRENGTH OF A GRAVITY DAM

A. MOTSONELIDZE,  L. GALDAVA
(Georgia)

This work focuses on a technique of static retrospective analysis of old gravity dams. An attempt is made to match the material and structural model of a dam with the actual operation history of the structure. The proposed technique consists of: a) nonlinear-elastic fracture constitutive model for concrete in the plane strain condition, b) cyclic-induced degradation of stiffness and strength for dam concrete and c) ageing-induced change of stiffness and strength for concrete (ageing of concrete). Under cyclic loading the cycles of reservoir filling up-discharge is implied, i.e. loading-runloadingl of hydrostatic pressure to the dam and bottom of a reservoir. The number of cycles depends on the type of reservoir regulation.

Last Updated on Tuesday, 15 April 2014 18:30
 
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