A Study of Vertical‐to‐Horizontal Ratio of Earthquake Components in the Gulf Coast Region

Research Article| September 25, 2017 A Study of Vertical‐to‐Horizontal Ratio of Earthquake Components in the Gulf Coast Region Alireza Haji‐Soltani; Alireza Haji‐Soltani aMueser Rutledge Consulting Engineers, 14 Penn Plaza, 225 W 34th Street, New York, New York 10122, ahaji-soltani@mrce.com Search for other works by this author on: GSW Google Scholar Shahram Pezeshk; Shahram Pezeshk bDepartment of Civil Engineering, The University of Memphis, Engineering Science Building, Room 104A, Memphis, Tennessee 38152, spezeshk@memphis.edu Search for other works by this author on: GSW Google Scholar Mojtaba Malekmohammadi; Mojtaba Malekmohammadi cWSP‐USA, 1 Pennsylvania Plaza, New York, New York 10119, malekm@pbworld.com Search for other works by this author on: GSW Google Scholar Arash Zandieh Arash Zandieh dLettis Consultants International, 4155 Darley Avenue, Boulder, Colorado 80305, arash.zandieh@live.com Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2017) 107 (5): 2055–2066. https://doi.org/10.1785/0120160252 Article history first online: 27 Sep 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Alireza Haji‐Soltani, Shahram Pezeshk, Mojtaba Malekmohammadi, Arash Zandieh; A Study of Vertical‐to‐Horizontal Ratio of Earthquake Components in the Gulf Coast Region. Bulletin of the Seismological Society of America 2017;; 107 (5): 2055–2066. doi: https://doi.org/10.1785/0120160252 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 A new ground‐motion prediction model is developed for the response spectral ratio of vertical‐to‐horizontal (V/H) components of earthquakes for the Gulf Coast region. The proposed V/H response spectral ratio model has the advantage of considering the earthquake magnitude, source‐to‐site distance, and the shear‐wave velocity of soil deposits in the upper 30 m of the site (⁠VS30⁠) for the peak ground acceleration, and a wide range of spectral periods (0.01–10.0 s). The model is based on a comprehensive set of regression analyses of the newly compiled Next Generation Attenuation‐East database of available central and eastern North America recordings with the moment magnitudes M≥3.4 and the rupture distances RRup<1000 km⁠. The 50th percentile (or median) pseudospectral acceleration values computed from the orthogonal horizontal components of ground motions rotated through all possible nonredundant rotation angles, known as the RotD50 (Boore, 2010), is used along with the vertical component to perform regression using a nonlinear mixed‐effects regression algorithm. The predicted V/H ratios from the proposed model are compared with the recently published V/H spectral ratio models for different regions. The derived V/H ratios can be used to develop the vertical response spectra for the sites located within the Gulf Coast region, which include the Mississippi embayment. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.