Title : Recent developments in procedures for the evaluation of liquefaction potential of soils: Italian case studies
Abstract:
Earthquake soil liquefaction may be a major cause of damage during strong earthquakes. When using semi-empirical procedures for evaluating liquefaction potential during earthquakes, it is important to use redundant correlations. A large amount of data have been collected in the recent years from site investigations in the city of Catania, which was struck in the past by severe earthquakes, such as 1693 and 1818 events. At San Giuseppe La Rena site near the coast, measurements of SPT, CPT, Kd and Vs using SDMT have been made in saturated sandy soils. Kd and Vs recommended relationships for sandy soils for potential liquefaction evaluation will be presented and discussed. The Seismic Dilatometer Marchetti Test (SDMT) has the advantage, in comparison with CPT and SPT tests, by measuring independent parameters, Kd and Vs. CPT and SPT based correlations are supported by large databases, while SDMT correlations are based on a limited database. Based on the San Giuseppe La Rena SDMT measurements recent data, a re-evaluation of Kd and Vs correlations has been made. The results show that Vs is less sensitive to potential liquefaction behaviour than Kd, which is, in contrast, very sensitive. The plotted correlations with critical values of Kd and Vs are suitable and very simple to use for detecting liquefaction potential.
Presentation Learning Outcome
- The equations can be used from audience in specific problems.
- This will help the audience in their job.
- This research could be used from other faculty.
- This research will provide a practical solution to the problem of defining earthquake soil liquefaction and could simplify designer’s job.
