Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines (2024) / Chapter Skim
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From page 19...
... 19   4.1 General The basis for the development of the guidelines documented herein is the experience of the research team, their in-house resources, and the resources of two subcontracted institutions and a commercial testing facility (see Author Acknowledgments)
From page 20...
... 20 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines that the study is limited to 1D software. This is because 2D and 3D programs can be run in 1D mode (i.e., in technical terms, they can be used to simulate vertical propagation of horizontally polarized shear waves)
From page 21...
... Basis for Development of Guidelines 21   The 2D/3D programs FLAC, PLAXIS, and OpenSees can simulate vertical propagation of horizontally polarized shear waves (i.e., can be run in 1D mode) can be run in the total-stress and effective-stress modes, and can model sand, clay, and silt in the same profile.
From page 22...
... 22 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines 1D TSA and requires no formal introduction. SHAKE2000 was used in this study solely for practical reasons because it comes in the same package as D-MOD2000 (another software program used in this study)
From page 23...
... Basis for Development of Guidelines 23   of plasticity include UBCSAND (Beaty and Byrne, 1998; 2011) , PM4SAND (Boulanger and Ziotopoulou, 2013a; 2013b)
From page 24...
... 24 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines similar model incorporated in PLAXIS and referred to as the HSsmall model. Other models used in this study are listed in Table 4-5.
From page 25...
... Basis for Development of Guidelines 25   shape of stress–strain hysteresis loops) , maximum excess pore pressure ratio, initial void ratio, and compressibility index.
From page 26...
... 26 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines Case History Image Relevant Information Wildlife Liquefaction Array http://www.soilquake. net/Downholearray/Wil dlife/ 1987 Elmore Ranch earthquake 1.
From page 27...
... Basis for Development of Guidelines 27   Case History Image Relevant Information Treasure Island/ Yerba Buena Island https://en.wikipedia.or g/wiki/Treasure_Island, _San_Francisco 1989 Loma Prieta earthquake 1. M 6.9/shallow crustal event (strike-slip fault)
From page 28...
... 28 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines Table 4-7 (see item 2 in the Relevant Information column) reveals that, out of seven case histories considered, one is representative of a near-field seismic event (R: 0–15 km)
From page 29...
... (a) WLA Site - Elmore Ranch Earthquake (Ts = 0.29 s)
From page 30...
... 30 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines experiment (see Section 6.3)
From page 31...
... Figure 4-2. Capabilities of physical modeling in the United States compared to case histories evaluated in this study.
From page 32...
... 32 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines Figure 4-4. Grain size distribution curves of liquefiable clean sands from past centrifuge experiments.
From page 33...
... Basis for Development of Guidelines 33   4.4.6 Selected Case Histories – PWP Records PWP records are available for only three out of six field case histories evaluated in this study (the WLA site in the 1987 M 6.6 Superstition Hills and 2012 M 4.9 Hovley events and the Owi Island site in the 1985 Chiba-Ibaragi event)
From page 34...
... 34 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines at the same depth (e.g., P2 and P5) notably varies; and (vi)
From page 35...
... Basis for Development of Guidelines 35   4.4.7 Selected Case Histories – Discussion For the purposes of this study, the WLA site, with two instrumented areas (i.e., arrays) and multiple recorded events, arguably yields the best set of case histories.
From page 36...
... 36 Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines and have been converted herein to a format usable by modern software. However, in the recorded seismic event, the site did not liquefy.

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