caa a22 4500 44584700X CHVBK 20180317145402.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10518-011-9255-5 doi (NATIONALLICENCE)springer-10.1007/s10518-011-9255-5 Quantification of ground-motion parameters and response spectra in the near-fault region [Elektronische Daten] [R. Rupakhety, S. Sigurdsson, A. Papageorgiou, R. Sigbjörnsson] This study focuses on the characteristics of near-fault ground motions in the forward-direction and structural response associated with them. These ground motions are narrow-banded in nature and are characterized by a predominant period at which structures excited by them are severely affected. In this work, predominant period is defined as the undamped natural period of a single-degree-of-freedom (SDOF) oscillator at which its 5% damped linear elastic pseudo-spectral velocity (PSV) contains a clear and dominant peak. It is found that a linear relationship exists between predominant period and seismic moment. An empirical equation describing this relationship is presented by using a large set of accelerograms. Attenuation equations are developed to estimate peak ground velocity (PGV) as a function of earthquake magnitude and source-to-site distance. In addition, a predictive equation for spectral shapes of PSV (i.e., PSV normalized by PGV) is presented as a continuous function of the undamped natural period of SDOF oscillators. The model is independent of PGV, and can be used in conjunction with any available PGV attenuation relation applicable to near-fault ground motion exhibiting forward-directivity effects. Furthermore, viscous damping of the SDOF is included in the model as a continuous parameter, eliminating the use of so-called damping correction factors. Finally, simple equations relating force reduction factors and displacement ductility of elasto-plastic SDOF systems are presented. Springer Science+Business Media B.V., 2011 Near-fault ground motion nationallicence Forward-directivity nationallicence Elastic response spectra nationallicence Peak ground velocity nationallicence Iso-ductility spectrum nationallicence Force reduction factor nationallicence Rupakhety R. Earthquake Engineering Research Center, University of Iceland, Austurvegur 2A, 800, Selfoss, Iceland aut Sigurdsson S. Earthquake Engineering Research Center, University of Iceland, Austurvegur 2A, 800, Selfoss, Iceland aut Papageorgiou A. Department of Civil Engineering, University of Patras, 26500, Patras, Greece aut Sigbjörnsson R. Earthquake Engineering Research Center, University of Iceland, Austurvegur 2A, 800, Selfoss, Iceland aut Bulletin of Earthquake Engineering Springer Netherlands 9/4(2011-08-01), 893-930 1570-761X 9:4<893 2011 9 10518 https://doi.org/10.1007/s10518-011-9255-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10518-011-9255-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rupakhety R. Earthquake Engineering Research Center, University of Iceland, Austurvegur 2A, 800, Selfoss, Iceland aut NATIONALLICENCE 700 1- Sigurdsson S. Earthquake Engineering Research Center, University of Iceland, Austurvegur 2A, 800, Selfoss, Iceland aut NATIONALLICENCE 700 1- Papageorgiou A. Department of Civil Engineering, University of Patras, 26500, Patras, Greece aut NATIONALLICENCE 700 1- Sigbjörnsson R. Earthquake Engineering Research Center, University of Iceland, Austurvegur 2A, 800, Selfoss, Iceland aut NATIONALLICENCE 773 0- Bulletin of Earthquake Engineering Springer Netherlands 9/4(2011-08-01), 893-930 1570-761X 9:4<893 2011 9 10518 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer