Comparison of Time Series and Random-Vibration Theory Site-Response Methods
| dc.contributor.utaustinauthor | Rathje, Ellen M. | en_US |
| dc.creator | Kottke, Albert R. | en_US |
| dc.creator | Rathje, Ellen M. | en_US |
| dc.date.accessioned | 2016-10-28T19:51:46Z | |
| dc.date.available | 2016-10-28T19:51:46Z | |
| dc.date.issued | 2013-06 | en_US |
| dc.description.abstract | The random-vibration theory (RVT) approach to equivalent-linear site-response analysis is often used to simulate site amplification, particularly when large numbers of simulations are required for incorporation into probabilistic seismic-hazard analysis. The fact that RVT site-response analysis does not require the specification of input-time series makes it an attractive alternative to other site-response methods. However, some studies have indicated that the site amplification predicted by RVT site-response analysis systematically differs from that predicted by time-series approaches. This study confirms that RVT site-response analysis predicts site amplification at the natural site frequencies as much as 20%-50% larger than time-series analysis, with the largest overprediction occurring for sites with smaller natural frequencies and sites underlain by hard rock. The overprediction is caused by an increase in duration generated by the site response, which is not taken into account in the RVT calculation. Correcting for this change in duration brings the RVT results within 20% of the time-series results. A similar duration effect is observed for the RVT shear-strain calculation used to estimate the equivalent-linear strain-compatible soil properties. An alternative to applying a duration correction to improve the agreement between RVT and time-series analysis is the modeling of shear-wave velocity variability. It is shown that introducing shear-wave velocity variability through Monte Carlo simulation brings the RVT results consistently within +/- 20% of the time-series results. | en_US |
| dc.description.department | Civil, Architectural, and Environmental Engineering | en_US |
| dc.description.sponsorship | Nuclear Regulatory Commission NRC-04-07-122 | en_US |
| dc.identifier | doi:10.15781/T25H7BX0P | |
| dc.identifier.citation | Kottke, Albert R., and Ellen M. Rathje. "Comparison of Time Series and Random?Vibration Theory Site?Response Methods." Bulletin of the Seismological Society of America, Vol. 103, No. 3 (Jun., 2013): 2111-2127. | en_US |
| dc.identifier.doi | 10.1785/0120120254 | en_US |
| dc.identifier.issn | 0037-1106 | en_US |
| dc.identifier.uri | http://hdl.handle.net/2152/43260 | |
| dc.language.iso | English | en_US |
| dc.relation.ispartof | en_US | |
| dc.relation.ispartofserial | Bulletin of the Seismological Society of America | en_US |
| dc.rights | Administrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University. | en_US |
| dc.rights.restriction | Open | en_US |
| dc.subject | ground-motion | en_US |
| dc.subject | spectra | en_US |
| dc.subject | simulation | en_US |
| dc.subject | geochemistry & geophysics | en_US |
| dc.title | Comparison of Time Series and Random-Vibration Theory Site-Response Methods | en_US |
| dc.type | Article | en_US |