Empirical porewater pressure generation model parameters in 1-D seismic site response analysis

Xuan Mei; Scott M. Olson; Youssef M.A. Hashash

doi:10.1016/j.soildyn.2018.07.011

Empirical porewater pressure generation model parameters in 1-D seismic site response analysis

Xuan Mei, Scott M. Olson, Youssef M.A. Hashash

Research output: Contribution to journal › Article › peer-review

Abstract

The Vucetic-Dobry porewater pressure (PWP) generation model is implemented in widely used one-dimensional site response analysis software. This PWP model relates excess PWP ratio, shear strain amplitude and number of cycles, and requires only three curve-fitting parameters from undrained cyclic shear tests. In this study, new empirical correlations were developed and validated using different databases of undrained cyclic direct simple shear and triaxial tests on a number of clean, subangular to subrounded, silica sands to relate model parameters to relative density (D_r) and uniformity coefficient (C_U). These correlations permit PWP estimates without advanced laboratory testing, yet exhibit small values of mean residual and standard deviation, and illustrate the importance of C_U on PWP generation.

Original language	English (US)
Pages (from-to)	563-567
Number of pages	5
Journal	Soil Dynamics and Earthquake Engineering
Volume	114
DOIs	https://doi.org/10.1016/j.soildyn.2018.07.011
State	Published - Nov 2018

ASJC Scopus subject areas

Civil and Structural Engineering
Geotechnical Engineering and Engineering Geology
Soil Science

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title = "Empirical porewater pressure generation model parameters in 1-D seismic site response analysis",

abstract = "The Vucetic-Dobry porewater pressure (PWP) generation model is implemented in widely used one-dimensional site response analysis software. This PWP model relates excess PWP ratio, shear strain amplitude and number of cycles, and requires only three curve-fitting parameters from undrained cyclic shear tests. In this study, new empirical correlations were developed and validated using different databases of undrained cyclic direct simple shear and triaxial tests on a number of clean, subangular to subrounded, silica sands to relate model parameters to relative density (Dr) and uniformity coefficient (CU). These correlations permit PWP estimates without advanced laboratory testing, yet exhibit small values of mean residual and standard deviation, and illustrate the importance of CU on PWP generation.",

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year = "2018",

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AU - Mei, Xuan

AU - Olson, Scott M.

AU - Hashash, Youssef M.A.

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AB - The Vucetic-Dobry porewater pressure (PWP) generation model is implemented in widely used one-dimensional site response analysis software. This PWP model relates excess PWP ratio, shear strain amplitude and number of cycles, and requires only three curve-fitting parameters from undrained cyclic shear tests. In this study, new empirical correlations were developed and validated using different databases of undrained cyclic direct simple shear and triaxial tests on a number of clean, subangular to subrounded, silica sands to relate model parameters to relative density (Dr) and uniformity coefficient (CU). These correlations permit PWP estimates without advanced laboratory testing, yet exhibit small values of mean residual and standard deviation, and illustrate the importance of CU on PWP generation.

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Empirical porewater pressure generation model parameters in 1-D seismic site response analysis

Abstract

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