When a structure applies load on a footing, total and effective stress increases in soil mass. NovoLiq can update σv and σv based on stress increase (ΔP) due to stress below the footing. This overburden stress update will not be applied for calculating N1(60) which is dependent on overburden stress, too. All other parameters which are function of overburden stress will be raised by ΔP; for example Cyclic Stress Ratio will be calculated as below:

CSR

Where:

σv : total overburden pressure at the depth considered

σv’ : effective overburden pressure at the same depth

 

 Stress increase is calculated based on 2:1 slope method: ΔP=B.L.P / {(B+Z).(L+Z)}

 

Where:

B: Foundation width

L: Foundation Length

P: Stress below the foundation (load / length2)