This feature is used for setting NovoLIQ preferences and is accessible from toolbar and also from  Tools⏵Preferences menu. This page has three tabs:

 

General

In this tab user can apply constraints on some parameters used during liquefaction assessment.

 

0 < Dr < 100

Some correlations for relative density (Dr) yield invalid results for some SPT blow counts. If this option is selected, NovoLIQ keeps the correlated Dr between 0 and 100 to be consistent with geotechnical concept of relative density.

0.4 < Cn < 1.7

Depth (overburden stress) correction factor for SPT blow counts, is known to be valid when between 0.4 and 1.7. By selecting this option, this rule will be applied to the calculated Cn.

0 < CRR1 < 0.8

Since most of the curves for Cyclic Resistance Ratio (CRR) are presented for CRR≤0.8, it is recommended to keep calculated CRR1 is this range. If this option is not selected, some formula may result in very large values or even negative values.

Round BDT blow counts ...

Becker Density Test results can be correlated to equivalent SPT blow counts (see more details here); NovoLIQ will round the equivalent SPT blow count to an integer number if this option is selected.

Ignore lateral spreading when N1(60)>15 and M<8

If selected, for "Youd 2002" and "Barlett & Youd 1992" methods only, the post-liquefaction lateral spreading will be considered ZERO when M<8 and N1(60)>15. For more information please read page 15 of this reference:

Liquefaction-Induced Lateral Displacement
T. Leslie Youd , June 1993


In addition, on General tab you can:

  • choose user interface language (when available) 
  • choose the input/output units system for NovoLiq user interface and reports


Analysis Methods

In this tab user can set the default methods for calculating the following parameters:


Magnitude Scaling Factor (MSF) : this factor is used to adjust the CRR for earthquake magnitudes other than 7.5 and could be calculated based on different methods based on user's choice (please read theory for more details).


Stress Reduction Factor (Rd) : this factor is used for calculating the CSR calculation and may be chosen from a variety of methods.


Relative Density Method : according to Zhang & Robertson (2004) method, maximum shear strain is calculated based on relative density of soil. Relative density itself, can be estimated from SPT blow count. Correlation method used for calculating relative density can be selected by user.


Lateral Spreading Method : For "Zhang & Robertson 2004" and "Faris 2006" methods, details of calculation will be provided at each depth in a tabular format. Three columns under "Lateral Spreading Indexes" present details of the method selected in this page.



Fines Content Correction : in most liquefaction analysis methods, CRR curve is proposed for clean sand (fines content less than 5 percent). If sand contains more fines content, usually field tests should be corrected before being used for CRR calculations.

 

These settings will be saved and applied to the current and future analysis.