Characterization of the contractive and pore pressure behavior of saturated sand deposits under seismic loading

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• 作者：Vicente Mercado^a ; ^{vmercado@uninorte.edu.co} ; Waleed El-Sekelly^b ; ^{waleed.elsekelly@gmail.com} ; Mourad Zeghal^c ; ^{zeghal@rpi.edu} ; Tarek Abdoun^c ; ^{abdout@rpi.edu} ; Ricardo Dobry^c ; ^{dobryr@rpi.edu} ; Sabanayagam Thevanayagam^d ; ^{theva@buffalo.edu}
• 关键词：System identification ; Downhole array ; Soil dynamics ; Pore pressure response
• 刊名：Computers and Geotechnics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：82
• 期：Complete
• 页码：223-236
• 全文大小：4017 K
• 卷排序：82

文摘

This paper presents an identification technique to characterize the contractive and pore pressure behavior of loose sandy soils under seismic excitation. The technique relies on acceleration and pore pressure records provided during excitation by vertical arrays of accelerometers and pore pressure sensors. The technique employs non-parametric estimates of shear stresses and strains. A multi-surface plasticity approach is used to model the soil response. A reduced scale centrifuge model and a large scale experiment are used to demonstrate the capabilities of the developed technique. The technique allows for a more complete interpretation of the coupled shear–volume behavior of a soil deposit.