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Procedure for the evaluation of soil liquefaction resistance (all soils) - Robertson (2010) <br />Calculation of soil resistance against liquefadion is performed according to the Robertson & Wride (1998) procedure. This <br />procedure used in the software, slightly differs from the one originally published in NCEER-97-0022 (Proceedings of the NCEER <br />Workshop on Evaluation of Liquefaction Resistance of Soils). The revised procedure is presented below in the form of a <br />flowcharti: <br />CPT <br />qi. 4. avo, o'vo, pa = 1 atm <br />all same units as p. <br />Initial stress exponent: n = 1.0; Calculate On. Fr. Ic <br />n =0.381(4) + 0.05 Zk <br />PO , <br />-0.15 <br />n 51.0 <br />Iterate until change in 4 An 5 0.01 <br />. <br />C -121 <br />.0 <br />[(0 - a.)1 <br />L p. 1. EN F; = (q: -1 )•100 <br />lic 5 2.50 <br />t).47 - log(L); + (1.22 + loglt )2 r <br />f 2.50<Ic< 2.70 h (Ie 2 2.70 1 <br />Lf 4 5 1.64, Kc = 1.0 v <br />When 1.64 < 4 S 2.60 <br />Kc = 5.5843 - 0.403 12 - 21.63 Ic.2 4- 33.756 - 17.88) K <br />If 1.64 < 4 < 2.36 AND Fr 40.596. set Kc = 1.0 <br />c =6*10-3(46.16 <br />Qtu.cs =Kc 'Qun • <br />1 <br />CRR 7-3 = 93 -ize-1 + 0.08 <br />1000 ]CRR,3 -0.054£,NK,2 - <br />50EO 5160 <br />1 P. IC Robertson, 2009. "Perforn·nnce based earthquake design usi ng the CFT", Keynote Lecture, Internati onal Conference ort <br />Performance-based Design in Earthquake Geotechnical Engineering - from case history to practice, IS-Tokyo, June 2009 <br />CUq v. 1.5.1.16 - CPT Uquefaction Assessment Software 50 <br />SL Rvcd 2019.01.21