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Reference Rock Site Condition for Central and Eastern North America

2014; Seismological Society of America; Volume: 104; Issue: 2 Linguagem: Inglês

10.1785/0120130132

1943-3573

Youssef M. A. Hashash, Albert Kottke, Jonathan P. Stewart, K. W. Campbell, B. Kim, Cerian Moss, Sissy Nikolaou, Ellen M. Rathje, W. J. Silva,

earthquake and tectonic studies

Research Article| March 25, 2014 Reference Rock Site Condition for Central and Eastern North America Youssef M. A. Hashash; Youssef M. A. Hashash aDepartment of Civil and Environmental Engineering, University of Illinois at Urbana‐Champaign, 2230c Newmark Civil Engineering Laboratory, 205 N. Mathews Avenue, Urbana, Illinois 61801hashash@illinois.edu Search for other works by this author on: GSW Google Scholar Albert R. Kottke; Albert R. Kottke bBechtel National, Inc., 50 Beale Street, 15/D22, San Francisco, California 94105‐1895akottke@bechtel.com Search for other works by this author on: GSW Google Scholar Jonathan P. Stewart; Jonathan P. Stewart cCivil and Environmental Engineering Department, University of California, 5731 Boelter Hall, Los Angeles, California 90095jstewart@seas.ucla.edu Search for other works by this author on: GSW Google Scholar Kenneth W. Campbell; Kenneth W. Campbell dEQECAT, Inc., 1030 NW 161st Place, Beaverton, Oregon 97006kcampbell@eqecat.com Search for other works by this author on: GSW Google Scholar Byungmin Kim; Byungmin Kim eRisk Management Solutions, Inc, 7575 Gateway Boulevard, Newark, California 94560Byungmin.Kim@rms.com Search for other works by this author on: GSW Google Scholar Cheryl Moss; Cheryl Moss fMueser Rutledge Consulting Engineers, 225 West 34th Street, New York, New York 10122cmoss@mrce.comsnikolaou@mrce.com Search for other works by this author on: GSW Google Scholar Sissy Nikolaou; Sissy Nikolaou fMueser Rutledge Consulting Engineers, 225 West 34th Street, New York, New York 10122cmoss@mrce.comsnikolaou@mrce.com Search for other works by this author on: GSW Google Scholar Ellen M. Rathje; Ellen M. Rathje gDepartment of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, 301 E. Dean Keeton Street, STOP C1792, Austin, Texas 78712e.rathje@mail.utexas.edu Search for other works by this author on: GSW Google Scholar Walter J. Silva Walter J. Silva hPacific Engineering and Analysis, 311 Pomona Avenue, El Cerrito, California 94530pacificengineering@juno.com Search for other works by this author on: GSW Google Scholar Author and Article Information Youssef M. A. Hashash aDepartment of Civil and Environmental Engineering, University of Illinois at Urbana‐Champaign, 2230c Newmark Civil Engineering Laboratory, 205 N. Mathews Avenue, Urbana, Illinois 61801hashash@illinois.edu Albert R. Kottke bBechtel National, Inc., 50 Beale Street, 15/D22, San Francisco, California 94105‐1895akottke@bechtel.com Jonathan P. Stewart cCivil and Environmental Engineering Department, University of California, 5731 Boelter Hall, Los Angeles, California 90095jstewart@seas.ucla.edu Kenneth W. Campbell dEQECAT, Inc., 1030 NW 161st Place, Beaverton, Oregon 97006kcampbell@eqecat.com Byungmin Kim eRisk Management Solutions, Inc, 7575 Gateway Boulevard, Newark, California 94560Byungmin.Kim@rms.com Cheryl Moss fMueser Rutledge Consulting Engineers, 225 West 34th Street, New York, New York 10122cmoss@mrce.comsnikolaou@mrce.com Sissy Nikolaou fMueser Rutledge Consulting Engineers, 225 West 34th Street, New York, New York 10122cmoss@mrce.comsnikolaou@mrce.com Ellen M. Rathje gDepartment of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, 301 E. Dean Keeton Street, STOP C1792, Austin, Texas 78712e.rathje@mail.utexas.edu Walter J. Silva hPacific Engineering and Analysis, 311 Pomona Avenue, El Cerrito, California 94530pacificengineering@juno.com Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Bulletin of the Seismological Society of America (2014) 104 (2): 684–701. https://doi.org/10.1785/0120130132 Article history First Online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Youssef M. A. Hashash, Albert R. Kottke, Jonathan P. Stewart, Kenneth W. Campbell, Byungmin Kim, Cheryl Moss, Sissy Nikolaou, Ellen M. Rathje, Walter J. Silva; Reference Rock Site Condition for Central and Eastern North America. Bulletin of the Seismological Society of America 2014;; 104 (2): 684–701. doi: https://doi.org/10.1785/0120130132 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 The reference rock site condition has two important applications for ground‐motion prediction in the stable continental region of central and eastern North America (CENA). (1) It represents the site condition for which ground motions are computed using semiempirical ground‐motion prediction equations. In addition, (2) it represents the site condition to which site amplification factors, which are used to modify ground‐motion intensity measures for softer site condition, are referenced (i.e., site amplification is unity for reference rock). We define reference rock by its shear (S)‐ and compression (P)‐wave velocities, as well as a site attenuation parameter (κ0), which is used in stochastic ground‐motion simulation methods. Prior definitions of reference rock conditions in CENA were based mostly on indirect large‐scale crustal velocity inversions and judgment. We compile and interpret a unique database of direct velocity measurements to develop criteria for assessing the presence of reference rock site condition based on measured seismic velocities and their gradient with respect to depth. We apply the criteria to available profiles and perform rigorous statistical analysis from which we recommend S‐ and P‐wave velocities of 3000 and 5500 m/s, respectively, for the reference rock condition. We recommend that, for practical applications, use ranges of reference S‐ and P‐wave velocities of 2700–3300 m/s and 5000–6100 m/s, respectively. The ranges are based on a ±5% change in amplification using quarter‐wavelength theory. We do not find evidence for regional dependence of the reference velocities, which are derived principally from three general geographic regions: (1) Atlantic coast, (2) continental interior, and (3) Appalachian Mountains. Our data do not provide reference velocities for the Gulf Coast region. The recommended velocity‐compatible reference rock site kappa is 0.006 s. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.