Overall Settlement and Rotation of Foundation
The foundation settlement is substantially influenced by the overall stiffness of the system represented by foundation structure and foundation soil given by:
where: | Ebasic | - | modulus of elasticity of footing |
t | - | foundation thickness | |
Edef, av | - | weighted average of the deformation modulus up to a depth of the influence zone | |
l | - | footing dimension in the direction of searched stiffness |
For k > 1 the foundation is assumed to be rigid and as a representative point for the determination of its settlement is assumed the characteristic point (distant by 0.37 times the foundation dimension from its axis).
For k < 1 the foundation structure is assumed to be compliant and as a representative point for the determination of foundation, the settlement is assumed the foundation center point.
The foundation rotation is determined as a difference in settlements of individual edges centers.
Rotation of spread footing - principle calculation