Estimating the Liquefaction Related Geotechnical Hazards in Probabilistic Seismic Hazard Assessment Framework

2016-06-26
Gülerce, Zeynep
Yıldızlı, Burak
The objective of this study is to develop a performance-based earthquake engineering (PBEE) framework for the liquefaction-related hazards and estimate the hazard levels for liquefaction-related engineering demand parameters (EDPs) in a probabilistic manner. Two efficient, sufficient, and hazard compatible EDPs: probability of liquefaction (PL) and post-liquefaction settlement (δL) are selected. Seismic demand models that explain the relationship between these EDPs and ground motion IMs are employed in a semi-deterministic seismic hazard analysis. Results of the analysis are presented in terms of EDP vs. rupture distance and peak ground acceleration (PGA) plots. Two damage measures; 50% PL and 10 cm δL in Mw ≤ 7.0 earthquakes are defined. The cut-off rupture distance which should be used to select a distance range for considering the liquefaction-related hazards is defined for these damage measures and calculated for a 10 m liquefiable soil column. Similarly, the cut-off PGA below which the PL < 50% or δL < 10 cm for Mw ≤ 7.0 earthquakes are calculated since the design PGA is provided in codes and regulations and the PGA threshold for considering the liquefaction-related hazards is valuable in practical applications. Variation in the cut-off parameters with the change in soil properties is thoroughly discussed.
Citation Formats
Z. Gülerce and B. Yıldızlı, “Estimating the Liquefaction Related Geotechnical Hazards in Probabilistic Seismic Hazard Assessment Framework,” 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/76453.