CPT-based probabilistic assessment of seismic soil liquefaction triggering relationships

Can, Gizem
The research aims to define possibly the most accurate and unbiased probability-based seismically induced soil liquefaction triggering relationships for cohesionless soils. One key objective is to construct a well-studied database that processes liquefied and non-liquefied case histories from seismic events up to date consistently. For that purpose, Moss et al. (2003) database is revisited with improved parameter investigation, better case history processing, and advanced regression tools. Then the final database is extended with new case histories compiled from the 2001 Nisqually earthquake, 2003 San Simeon earthquake, 2010 El Mayor Cucapah earthquake, 2010 Maule earthquake, 2010 Jiasian earthquake, 2010-2011 New Zealand-Canterbury earthquakes, 2011 Tohoku earthquake, 2012 Emilia-Romagna earthquakes, 2015 Illapel earthquake. After complying with the entire database, it is processed to develop improved CPT-based correlations for predicting the initiation of soil liquefaction during earthquakes; then, the database is evaluated by overall uncertainty using higher-order regression tools. Maximum likelihood assessment is chosen as the probabilistic framework for developing resulting liquefaction triggering boundary curves and relationships. Several important details and corrections relating to the interpretation of CPT data are studied to make the correlation as accurate as possible.


SPT-based probabilistic and deterministic assessment of seismic soil liquefaction potential
Çetin, Kemal Önder; Der Kiureghian, A.; Tokimatsu, K.; Harder, L.f.; Kayen, R.e.; Moss, R.e.s. (2004-01-01)
This paper presents new correlations for assessment of the likelihood of initiation (or “triggering”) of soil liquefaction. These new correlations eliminate several sources of bias intrinsic to previous, similar correlations, and provide greatly reduced overall uncertainty and variance. Key elements in the development of these new correlations are (1) accumulation of a significantly expanded database of field performance case histories; (2) use of improved knowledge and understanding of factors affecting in...
SPT-based probabilistic assessment of seismic soil liquefaction triggering
Ilgaç, Makbule; Çetin, Kemal Önder; Kayen, Robert Edward; Department of Civil Engineering (2022-6-09)
The in-situ tests are proven to be a reliable approach to assessing the resistance against seismic soil liquefaction triggering. The scope of this research is to enrich previous SPT-based databases with new case histories from events that occurred in the last 25 years and employ an updated processing perspective with a new set of parameters and correction terms. The new SPT-based liquefaction triggering field case history database is based upon a large field case history from seismic events between 1964 and...
Probabilistic models for the initiation of seismic soil liquefaction
Çetin, Kemal Önder; Kiureghian, AD; Seed, RB (2002-01-01)
A Bayesian framework for probabilistic assessment of the initiation of seismic soil liquefaction is described, A database, consisting of post-earthquake field observations of soil performance, in conjunction with in situ "index" test results is used for the development of probabilistically-based seismic soil liquefaction initiation correlations. The proposed stochastic model allows full and consistent representation of all relevant uncertainties. including (a) measurement/estimation errors, (b) model imperf...
The use of the SPT-based seismic soil liquefaction triggering evaluation methodology in engineering hazard assessments
Çetin, Kemal Önder; Kayen, Robert E.; Moss, Robb E. S.; Bilge, Habib Tolga; Ilgaç, Makbule (2018-01-01)
Probabilistic and deterministic seismic soil liquefaction triggering methodologies are proposed in Cetin et al. [1]. This manuscript: i) presents the protocols, which need to be followed for the correct use of this methodology for forward engineering (design) assessments, ii) guides the engineers through the procedure, and iii) discusses the "tricks" alongside the protocol. An illustrative soil profile shaken by a scenario earthquake is presented, through which consistent estimations of representative SPT b...
Fuzzy Vulnerability Assessment of Coastal Areas To Sea Level Rise
ÖZYURT, GÜLİZAR; Ergin, Ayşen; Baykal, Cüneyt (2010-07-05)
This paper discusses a parameter based coastal vulnerability assessment model to sea level rise. The model integrates physical characteristics and human activities with expert perception through an application of analytical hierarchy process (AHP). The results of AHP enables users to assign weights to parameters of the model which determine vulnerability of a coastal area to the impacts of sea level rise such as coastal erosion, inundation, flooding due to storm surges, saltwater intrusion to groundwater an...
Citation Formats
G. Can, “CPT-based probabilistic assessment of seismic soil liquefaction triggering relationships,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.