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EVALUATION OF EQUIVALENT CYCLE LIQUEFACTION CONCEPT BASED ON TXSS TEST RESULTS
Session: Laboratory Testing II / Essais en laboratoire II
Marwan Khashila, Sherbrooke University (Canada)
Mahmoud Hussien , Sherbrooke University (Canada)
Mourad Karray, Sherbrooke University (Canada)
Mohamed Chekired , Hydro-Québec, Montréal (Canada)
The concept of equivalent number of cycles is that, an irregular earthquake load can be replaced by uniform cycles that have the same damage effect on the soil to trigger liquefaction. In this paper, uniform and non-uniform cyclic strain-controlled tests have been carried out using the new combined triaxial simple shear (TxSS) apparatus on different saturated reconstituted samples of Ottawa C-109 and Baie-Saint-Paul sands. An empirical expression developed to estimate the buildup of pore pressure, Ru that has been later used in this study as damage metric for computing the equivalent number of cycles, neq?. The estimated neq? based on the experimental results has been compared successfully with those computed by the well-established P-M and R-N damage hypotheses.
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