Physics Behind Dome Structures

Keeping in mind that my dome is sitting on top of my concrete curvature walls, I must understand the physics behind what would keep the dome standing without collapsing inwards.

• Compression forces are two forces which act on one object by moving in opposite directions toward each other. 
• Tension forces are two forces which act on one object by moving in opposite directions away from each other. 
• The force of gravity pushes downward on an object. And the normal force pushes in the opposite direction, upward.