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Spread Footing
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: | Ezakl | - | modulus of elasticity of footing |
| t | - | foundation thickness | |
| Edef,prum | - | weighted average of the deformation modulus up to depth of 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 0,37times 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 settlement is assumed the foundation center point.
The foundation rotation is determined from the difference of settlements of center and of individual edges.
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