Limit states

The list of limit states for spread foundations does not include failure by overturning. This is considered to be a form of bearing resistance failure, in the ultimate limit state, and to be covered by 'excessive settlements' in the serviceability limit state.

The list includes both combined failure in ground and in structure and structuralfailure due tofoundation movement. The first of these is intended to refer to situations where a failure mechanism forms in the ground and the structure is ruptured at the same time. The second refers to situations where the ground itself has not failed, but displacements are sufficiently large to rupture the structure. The displacements could be settlement, heave, horizontal movement or rotation, or a combination of these.

+1 0

Post a comment