Estimation of response-spectral values as functions of magnitude, distance, and site conditions
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Estimation of response-spectral values as functions of magnitude, distance, and site conditions

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Published by U.S. Geological Survey in Menlo Park, CA .
Written in English


  • Earthquake prediction.

Book details:

Edition Notes

Statementby W.B. Joyner and D.M. Boore.
SeriesOpen-file report -- 82-881., Open-file report (Geological Survey (U.S.)) -- 82-881.
ContributionsBoore, David M., Geological Survey (U.S.)
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL15265564M

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vertical logarithmic response spectral values, respectively. These predictions are a function of the earthquake magnitude (M), distance (R), period (T), and other parameters (h), such. The work was performed by a systematic study ofresponse spectra as a function of magnitude and site conditions, usingrecords from the European Strong-Motion results confirm the. Earthquake magnitude ranging from 4 to , source-to-site distance from 7 to 80 km and three different site conditions were considered: rock, stiff soil and soft : J. Douglas. Estimate of spectral and pseudo-spectral acceleration proximity. distance, magnitude, mechanism, source-to-site azimuth, and event chronology). A simple model is proposed in the form of a.

Informal Definition of Spectral Estimation Given: A finite record of a signal. Determine: The distribution of signal power over frequency. t signal t=1, 2, File Size: KB. $\begingroup$ The problem with this potential solution is, if the phase is unknown about an existing transfer function, FDLS may converge on the wrong solution if the wrong phase is assumed, no matter how accurately the order is correctly guessed or the magnitude response is measured. $\endgroup$ – hotpaw2 Mar 12 '13 at Two different types of psychophysical scales can be used when the experimenter designs the response region of magnitude estimation. One is a unipolar scale and the other is a bipolar scale. Each scale has unique properties with regard to magnitude by: The method of magnitude estimation is used in psychophysical studies to obtain numerical values for the intensity of perception of environmental stresses (e.g., noise and vibration). The exponent in a power function relating the subjective magnitude of a stimulus (e.g., the degree of discomfort) to the physical magnitude of the stimulus shows Cited by:

These equations use scaling in terms of moment magnitude M W, and describe the local site conditions in terms of V 30, the shear wave velocity in the top 30 m of soil. Magnitude Estimation is a psychophysical method in which participants judge and assign numerical estimates to the perceived strength of a stimulus. This technique was developed by S. S. Stevens in the s (e.g., Stevens, ). Magnitude estimation usually works in the following way. If you need a more accurate estimation than this algorithm provides, you can use some variation of it. For example, varying values of Alpha and Beta can be taken from a small lookup table, driven by the relative size of min and max values. Another possibility is to use this estimate as the “seed” of an iterative magnitude estimator. “Correlation of response spectral values in Japanese ground motions.” Earthquakes and Structures, 2(4), Ground motion models predict the mean and standard deviation of the logarithm of spectral acceleration, as a function of predictor variables such as earthquake magnitude, distance and site condition.