Semi-empirical procedures for evaluating liquefaction potential during earthquakes

✍ Scribed by I.M. Idriss; R.W. Boulanger

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 638 KB
• Volume: 26
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/j.soildyn.2004.11.023

✦ Synopsis

Semi-empirical procedures for evaluating the liquefaction potential of saturated cohesionless soils during earthquakes are re-examined and revised relations for use in practice are recommended. The stress reduction factor (r d ), earthquake magnitude scaling factor for cyclic stress ratios (MSF), overburden correction factor for cyclic stress ratios (K s ), and the overburden normalization factor for penetration resistances (C N ) are discussed and recently modified relations are presented. These modified relations are used in re-evaluations of the SPT and CPT case history databases. Based on these re-evaluations, revised SPT-and CPT-based liquefaction correlations are recommended for use in practice. In addition, shear wave velocity based procedures are briefly discussed.