Computational of Temperature and Stresses for Mujib Dam
Boundary and Initial Conditions
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| Boundary and Initial Conditions
The boundary and initial conditions are defined as follows: 1. All boundaries around the foundation rock satisfy the adiabatic conditions: 0 .
n T (This means that there is no change in temperature in the direction normal to the planes). Where T is the transient temperature, n the outer unit normal. The dam and foundation that are exposed to the atmosphere satisfy the following condition (as defined previously).
B f T T h n T K Where K is the thermal conductivity, h f is the film coefficient and T B is ambient temperature.
2. Initial condition. The initial temperature for all nodes of foundation is assigned from rock temperature. The initial temperature of each layer of the dam is set to be equal to the placement temperature.
3. Structural boundary conditions. The foundation rock is infinite and no horizontal movement is allowed; thus the foundation rock is restricted in all horizontal directions (This means that there are rollers on vertical boundaries and pins at the bottom boundary) and the vertical direction movement is restricted in the bottom
9 boundary. For three dimension structural analyses, the RCC body is free at contraction joint, and constrained at plan of symmetry, where the monolith block is 60 meter and the design thickness is 30 meter, see Figure 8 for 2D and 3D structural boundary conditions.
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