Abstract
Recent studies have shown that the vertical component of ground motion can be quite destructive on a variety of structural systems. Development of response spectrum for design of buildings subjected to vertical component of earthquake needs ground motion prediction equations (GMPEs). The existing GMPEs for northern Iranian plateau are proposed for the horizontal component of earthquake, and there is not any specified GMPE for the vertical component of earthquake in this region. Determination of GMPEs is mostly based on regression analyses on earthquake parameters such as magnitude, site class, distance, and spectral amplitudes. In this study, 325 three-component records of 55 earthquakes with magnitude ranging from M w 4.1 to M w 7.3 are used for estimation on the regression coefficients. Records with distances less than 300 km are selected for analyses in the database. The regression analyses on earthquake parameters results in determination of GMPEs for peak ground acceleration and spectral acceleration for both horizontal and vertical components of the ground motion. The correlation between the models for vertical and horizontal GMPEs is studied in details. These models are later compared with some other available GMPEs. According to the result of this investigation, the proposed GMPEs are in agreement with the other relationships that were developed based on the local and regional data.
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Acknowledgments
This project is sponsored financially by the International Institute Earthquake Engineering and Seismology (IIEES) under the grant number 618. This support is gratefully acknowledged. The authors would like to thank the Building and Housing Research Centre of Iran (BHRC) for providing the accelerographic database.
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Soghrat, M.R., Ziyaeifar, M. Ground motion prediction equations for horizontal and vertical components of acceleration in Northern Iran. J Seismol 21, 99–125 (2017). https://doi.org/10.1007/s10950-016-9586-4
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DOI: https://doi.org/10.1007/s10950-016-9586-4