Effect of Shaking Duration on Foundation Settlement in Liquefiable Soils: 1-g Shake Table Tests
Publication: Geo-Congress 2023
ABSTRACT
The effects of shaking duration on liquefaction-induced settlements have been studied in the past, but there is a lack of experimental data in the literature. Therefore, a series of moderate scale 1-g shake table experiments are conducted to evaluate the influence of shaking duration with the same input motion in liquefiable soil layers. First, a 1/5 scaled model is prepared based on a large-scale shake table experiment conducted recently at the University of California, San Diego. The scaled model consists of three soil layers with relative densities of 50% for the top crust, 30% for the middle liquefiable, and 85% for the bottom dense layers. Second, a shallow foundation is seated over the crust layer, which consists of unsaturated sandy soil. Third, the models are subjected to harmonic input motions with different shaking durations (i.e., 8, 12, and 15 s). Based on the prototype test, the expected settlement of the foundation was 25 mm; however, the measured settlement was 60 mm. The foundation and free field settlement increased from 7 mm to 157 mm and 3.5 mm to 14 mm when the shaking time was increased from 8 to 15 s.
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REFERENCES
Bray, J. D., Cubrinovski, M., Zupan, J., and Taylor, M. (2014). “Liquefaction Effects on Buildings in the Central Business District of Christchurch.” Earthquake Spectra, Vol. 30, No.1, 85–109.
Bray, J. D., and Dashti, S. (2014). “Liquefaction-Induced Building Movements.” Bulletin of Earthquake Engineering, 12(3), 1129–1156.
Bray, J. D., and Macedo, J. (2017). “6th Ishihara Lecture: Simplified Procedure for Estimating Liquefaction-Induced Building Settlement.” Soil Dynamics Earthquake Engineering, 102, 215–231.
Dashti, S., Bray, J. D., Pestana, J. M., Riemer, M., and Wilson, D. (2010). “Centrifuge Testing to Evaluate and Mitigate Liquefaction-Induced Building Settlement Mechanisms.” Journal of Geotechnical and Geoenvironmental Engineering, 136(7), 918–929.
Dashti, S., Bray, J. D., Pestana, J. M., Riemer, M., and Wilson, D. (2010a). “Mechanisms of Seismically Induced Settlement of Buildings with Shallow Foundations on Liquefiable Soil.” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 136, No. 1, 151–164.
Dashti, S., and Bray, J. D. (2013). “Numerical Simulation of Building Response on Liquefiable Sand.” Journal of Geotechnical and Geoenvironmental Engineering, 139 (8), 1235–1249.
Iai, S. (1989). “Similitude for Shaking Table Tests on Soil-Structure Fluid Model in 1g Gravitational Field.” Journal of Soils and Foundations, Vol. 29, No. 1, 105–118.
Liu, L., and Dobry, R. (1997). “Seismic Response of Shallow Foundation on Liquefiable Sand.” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 123, No. 6, 557–567.
Macedo, J., and Bray, J. D. (2018). “Key Trends in Liquefaction-Induced Building Settlement.” Journal of Geotechnical and Geoenvironmental Engineering, 144 (11), 04018076.
Motamed, R., Orang, M. J., Parayancode, A., and Elgamal, A. (2020). “Results of a Class C Blind Prediction Competition on the Numerical Simulation of a Large-Scale Liquefaction Shaking Table Test.” In Proc., Geo-Congress 2020: Foundations, Soil Improvement, and Erosion, 334–342. Reston, VA: ASCE.
Orang, M. J., Bruketta, S., and Motamed, R. (2019, March). “Experimental Evaluation of Spatial Variability Effects on Liquefaction-Induced Settlements.” In Geo-Congress 2019: Earthquake Engineering and Soil Dynamics, 294–303. Reston, VA: American Society of Civil Engineers.
Orang, M. J., Motamed, R., Prabhakaran, A., and Elgamal, A. (2021). “Large-Scale Shake Table Tests on a Shallow Foundation in Liquefiable Soils.” Journal of Geotechnical and Geoenvironmental Engineering, 147(1), 04020152.
Rasouli, R., Hayashida, T., and Towhata, I. (2012, November). “Experimental Study on Subsidence of Surface Structures due to Liquefaction and its Mitigation.” In Proceedings of 1st International Symposium on Earthquake Engineering, Tokyo, Japan, 8–10.
Toth, J., and Motamed, R. (2017). “Parametric Study on Liquefaction-Induced Building Settlements using 1-g Shake Table Experiments.” The 3rd International Conference on Performance Based Design in Earthquake Geotechnical Engineering, Vancouver, CA, July 16-19, 2017, Paper no. 149.
Yoshimi, Y., and Tokimatsu, K. (1977). “Settlement of Buildings on Saturated Sand During Earthquakes. Soils and Foundations, 17(1), 23–38.
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Published online: Mar 23, 2023
ASCE Technical Topics:
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Foundation settlement
- Foundations
- Geomechanics
- Geotechnical engineering
- Laboratory tests
- Layered soils
- Motion (dynamics)
- Shake table tests
- Shallow foundations
- Soil dynamics
- Soil liquefaction
- Soil mechanics
- Soil properties
- Soil settlement
- Soils (by type)
- Solid mechanics
- Tests (by type)
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Cited by
- Md. Kausar Alam, Ramin Motamed, Atsou Komla Herve Agbemenou, Mitigation of Liquefaction-Induced Foundation Settlements Using Sheet Piling and Lowering Groundwater Level, Geo-Congress 2024, 10.1061/9780784485330.034, (326-335), (2024).