Measuring Liquefied Residual Strength Using Full-Scale Shake Table Cyclic Simple Shear Tests

• Main Author: Honnette, Taylor R
• Format: Others
• Published: DigitalCommons@CalPoly 2018
• Subjects: Liquefaction; Earthquake response; Seismic response; Cyclic; Geotechnical Engineering
• Online Access: https://digitalcommons.calpoly.edu/theses/1998; https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=3431&context=theses

This research consists of full-scale cyclic shake table tests to investigate liquefied residual strength of #2/16 Monterey Sand. A simple shear testing apparatus was mounted to a full-scale one-dimensional shake table to mimic a confined layer of saturated sand subjected to strong ground motions. Testing was performed at the Parson’s Geotechnical and Earthquake Laboratory at California Polytechnic State University, San Luis Obispo. T-bar penetrometer pullout tests were used to measure residual strength of the liquefied soil during cyclic testing. Cone Penetration Testing (CPT) was performed on the soil specimen throughout testing to relate the laboratory specimen to field index test data and to compare CPT results of the #2/16 Monterey sand before and after liquefaction. The generation and dissipation of excess pore pressures during cyclic motion are measured and discussed. The effects of liquefied soil on seismic ground motion are investigated. Measured residual strengths are compared to previous correlations comparing liquefied residual strength ratios and CPT tip resistance.