This study evaluates a variety of intensity measures (IMs) for predicting the liquefaction-induced residual settlement and tilt of shallow-founded structures. We use data from both numerical and physical (centrifuge) models of soil-foundation-structure systems. The relative quality of these IMs is quantified in terms of efficiency, sufficiency, and predictability. We consider both scalar and vector-valued IMs and evaluate the relative performance of IMs recorded at different locations (outcropping rock, within rock, far-field, and foundation) from nonlinear and equivalent-linear simulations. Cumulative absolute velocity (CAV) at outcropping rock is the optimum IM for predicting foundation settlement, while either outcropping rock CAV, peak ground velocity, or peak incremental ground velocity is optimum for predicting permanent foundation tilt. Vector IMs offer improvements to efficiency and sufficiency but may be impractical to predict.
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Research Article|
November 01, 2019
Assessment Supporting the Use of Outcropping Rock Evolutionary Intensity Measures for Prediction of Liquefaction Consequences
Zach Bullock, M. EERI;
Zach Bullock, M. EERI
a
Civil, Environmental, and Architectural Engineering Department, University of Colorado Boulder, Boulder, CO 80309;
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Shideh Dashti, M. EERI;
a
Civil, Environmental, and Architectural Engineering Department, University of Colorado Boulder, Boulder, CO 80309;shideh.dashti@colorado.edu (S. D.)
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Abbie B. Liel, M. EERI;
Abbie B. Liel, M. EERI
a
Civil, Environmental, and Architectural Engineering Department, University of Colorado Boulder, Boulder, CO 80309;
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Keith A. Porter, M. EERI;
Keith A. Porter, M. EERI
a
Civil, Environmental, and Architectural Engineering Department, University of Colorado Boulder, Boulder, CO 80309;
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Zana Karimi
Zana Karimi
b
AECOM Denver, Denver, CO 80202
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Earthquake Spectra (2019) 35 (4): 1899–1926.
Article history
received:
16 Apr 2018
accepted:
02 Apr 2019
first online:
08 Jun 2020
Citation
Zach Bullock, Shideh Dashti, Abbie B. Liel, Keith A. Porter, Zana Karimi; Assessment Supporting the Use of Outcropping Rock Evolutionary Intensity Measures for Prediction of Liquefaction Consequences. Earthquake Spectra 2019;; 35 (4): 1899–1926. doi: https://doi.org/10.1193/041618EQS094M
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