Title: NEESR Payload: Measurement of the Strength of Liquefied Soil in Physical Models (NEES-2012-0963)

Year Of Curation: 2012

Description: A technique for measuring the evolution of shear strength of liquefiable soils in physical models as earthquake-induced pore pressures change is desirable. It was envisioned that the shear strength of liquefying sands can be measured in-flight in a seismic geotechnical centrifuge model by pulling thin coupons (plates) horizontally through the soil models. The large strains and strain rates associated with liquefaction flow failures would thus be simulated by moving the coupon relative to the sand before, during, and after shaking. This paper presents the experimental details and results of seismic centrifuge tests on models of saturated F-75 sand that were used to make such measurements. It is shown that by measuring the drag force on the coupon, it is possible to observe the evolution of the soil shear strength as it decreases to a minimum (residual strength) and subsequently increases as excess pore pressures dissipate. (

Award: http://www.nsf.gov/awardsearch/showAward?AWD_ID=0724080

PIs & CoPIs: Mandar Dewoolkar, Pedro Alba

Dates: September 01, 2007 - August 31, 2010

Organizations: ,University of New Hampshire, NH, United States,,University of Vermont, VT, United States

Facilities: ,University of Colorado at Boulder, CO, United States

Sponsor: NSF - 0724080 (

Keywords: ,liquefaction,torsional ring shear,residual strength,strength of liquefied soil,earthquake,Centrifuge

Publications

• Mandar Dewoolkar, Pedro Alba (2017), "NEESR Payload: Measurement of the Strength of Liquefied Soil in Physical Models (NEES-2012-0963)," https://datacenterhub.org/deedsdv/publications/view/369.