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Physical, Analytical, and Numerical Modeling of Reverse Fault Displacement through Near Surface Soils

2018; Seismological Society of America; Volume: 108; Issue: 6 Linguagem: Inglês

10.1785/0120180067

1943-3573

Robb Eric S. Moss, Moises I Buelna, Kevin Stanton,

Seismic Waves and Analysis

Research Article| October 02, 2018 Physical, Analytical, and Numerical Modeling of Reverse‐Fault Displacement through Near‐Surface Soils Robb Eric S. Moss; Robb Eric S. Moss aDepartment of Civil and Environmental Engineering, California Polytechnic State University, 1 Grand Avenue, San Luis Obispo, California 93407, rmoss@calpoly.edu Search for other works by this author on: GSW Google Scholar Moises Buelna; Moises Buelna bJoby Aviation, 340 Woodpecker Ridge, Santa Cruz, California 95060, moises.buelna@jobyaviation.com Search for other works by this author on: GSW Google Scholar Kevin V. Stanton Kevin V. Stanton cArup, 560 Mission Street, Suite 700, San Francisco, California 94105, kevin.stanton@arup.com Search for other works by this author on: GSW Google Scholar Author and Article Information Robb Eric S. Moss aDepartment of Civil and Environmental Engineering, California Polytechnic State University, 1 Grand Avenue, San Luis Obispo, California 93407, rmoss@calpoly.edu Moises Buelna bJoby Aviation, 340 Woodpecker Ridge, Santa Cruz, California 95060, moises.buelna@jobyaviation.com Kevin V. Stanton cArup, 560 Mission Street, Suite 700, San Francisco, California 94105, kevin.stanton@arup.com Publisher: Seismological Society of America First Online: 02 Oct 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (6): 3149–3159. https://doi.org/10.1785/0120180067 Article history First Online: 02 Oct 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Robb Eric S. Moss, Moises Buelna, Kevin V. Stanton; Physical, Analytical, and Numerical Modeling of Reverse‐Fault Displacement through Near‐Surface Soils. Bulletin of the Seismological Society of America 2018;; 108 (6): 3149–3159. doi: https://doi.org/10.1785/0120180067 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Reverse faults can exhibit the behavior of not rupturing to the surface. Recognizing that these faults can be grouped tectonically and geomorphically as either emergent or re‐emergent reverse faults or as blind reverse‐structure complexes, this article focuses on emergent and re‐emergent faults where displacement has the potential of reaching the ground surface. Our prior research found that statistically the slope‐derived 30 m shear‐wave velocity was a useful predictor of whether reverse‐fault displacement would propagate to the surface. Given that slope‐derived 30 m shear‐wave velocity is a proxy for both small‐ and large‐scale physical properties, we investigated further by eliminating the slope and topography effects and focused primarily on the influence of shear stiffness. The research described herein includes physical fault‐box testing, analytical approximations, and numerical simulations to explore the physics of reverse‐fault displacement through near‐surface soils. We find that the tendency for dilatant or contractive behavior, in both granular and fine‐grained soils, is a primary controlling variable of the width of the shear band, where the shear band is the zone in which plane strain deformations occur. The width of the shear band, in turn, is related to how much basal displacement is required to propagate the crack tip from depth to the ground surface. We also experimentally confirmed that prior fault displacement through the soil reduces the amount of basal displacement needed to propagate the crack tip to the ground surface. Our results support that slope‐derived 30 m shear‐wave velocity is a useful proxy variable for determining the likelihood of surface‐fault displacement for reverse faults. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.