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Response of a RC pile group in liquefiable soil: A shake-table investigation
https://orcid.org/0000-0003-0030-1850
Abstract Soil liquefaction induced by earthquakes frequently cause costly damage to pile foundations. However, various aspects of the dynamic behavior and failure mechanisms of piles in liquefiable soils still remain unclear. This paper presents a shake-table experiment conducted to investigate the dynamic behavior of a reinforced-concrete (RC) elevated cap pile foundation during (and prior to) soil liquefaction. Particular attention was paid to the failure mechanism of the piles during a strong shaking event. The experimental results indicate that decreasing the frequency and increasing the amplitude of earthquake excitation increased the pile bending moment as well as the speed of the excess pore pressure buildup in the free-field. The critical pile failure mode in the conducted testing configuration was found to be of the bending type, which was also confirmed by a representative nonlinear numerical model of the RC pile. The experimental results of this study can be used to calibrate numerical models and provide insights on seismic pile analysis and design.
Highlights The dynamic behaviors of RC pile group prior to and during liquefaction are presented. The influences of several factors on the pile behaviors are investigated. The failure characteristics of the piles under a strong earthquake are highlighted.
Response of a RC pile group in liquefiable soil: A shake-table investigation
https://orcid.org/0000-0003-0030-1850
Abstract Soil liquefaction induced by earthquakes frequently cause costly damage to pile foundations. However, various aspects of the dynamic behavior and failure mechanisms of piles in liquefiable soils still remain unclear. This paper presents a shake-table experiment conducted to investigate the dynamic behavior of a reinforced-concrete (RC) elevated cap pile foundation during (and prior to) soil liquefaction. Particular attention was paid to the failure mechanism of the piles during a strong shaking event. The experimental results indicate that decreasing the frequency and increasing the amplitude of earthquake excitation increased the pile bending moment as well as the speed of the excess pore pressure buildup in the free-field. The critical pile failure mode in the conducted testing configuration was found to be of the bending type, which was also confirmed by a representative nonlinear numerical model of the RC pile. The experimental results of this study can be used to calibrate numerical models and provide insights on seismic pile analysis and design.
Highlights The dynamic behaviors of RC pile group prior to and during liquefaction are presented. The influences of several factors on the pile behaviors are investigated. The failure characteristics of the piles under a strong earthquake are highlighted.
Response of a RC pile group in liquefiable soil: A shake-table investigation
https://orcid.org/0000-0003-0030-1850
Abstract Soil liquefaction induced by earthquakes frequently cause costly damage to pile foundations. However, various aspects of the dynamic behavior and failure mechanisms of piles in liquefiable soils still remain unclear. This paper presents a shake-table experiment conducted to investigate the dynamic behavior of a reinforced-concrete (RC) elevated cap pile foundation during (and prior to) soil liquefaction. Particular attention was paid to the failure mechanism of the piles during a strong shaking event. The experimental results indicate that decreasing the frequency and increasing the amplitude of earthquake excitation increased the pile bending moment as well as the speed of the excess pore pressure buildup in the free-field. The critical pile failure mode in the conducted testing configuration was found to be of the bending type, which was also confirmed by a representative nonlinear numerical model of the RC pile. The experimental results of this study can be used to calibrate numerical models and provide insights on seismic pile analysis and design.
Highlights The dynamic behaviors of RC pile group prior to and during liquefaction are presented. The influences of several factors on the pile behaviors are investigated. The failure characteristics of the piles under a strong earthquake are highlighted.
Response of a RC pile group in liquefiable soil: A shake-table investigation
Tang, Liang (author) / Ling, Xianzhang (author)
Soil Dynamics and Earthquake Engineering ; 67 ; 301-315
2014-10-16
15 pages
Article (Journal)
Electronic Resource
English
Response of a RC pile group in liquefiable soil: A shake-table investigation
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