Results 191 to 200 of about 6,702 (242)

Accelerograms—Parkfield earthquake

Bulletin of the Seismological Society of America, 1967
Abstract Five accelerograms obtained during the main shock of the Parkfield earthquake series at locations adjacent to and within 10 miles of the trace of the San Andreas fault are presented together with limited analysis by electric analog methods.
William K. Cloud, Virgilio Perez
openaire   +1 more source

Generation of artificial strong motion accelerograms

Earthquake Engineering & Structural Dynamics, 1979
AbstractA method for generating synthetic strong motion accelerograms for use in engineering design is presented. This method utilizes the model proposed by Trifunac in 197127 in conjunction with the recent empirical scaling functions for characterization of amplitudes and duration of strong shaking in terms of (i) earthquake magnitude, M, and ...
H. L. Wong, M. D. Trifunac
openaire   +1 more source

Generation of spectrum compatible accelerograms

Earthquake Engineering & Structural Dynamics, 1979
AbstractIn this paper a new method is presented for generating earthquake accelerograms which have pre‐established response spectra. The non‐stationary random nature and other salient features of the accelerograms can be taken care of by the procedure developed. The method leads to a sample spectrum which lies above the given spectrum.
Iyengar, Narayana R, Rao, Narasimha P
openaire   +1 more source

Synthesizing Ensembles of Spatially Correlated Accelerograms

Journal of Engineering Mechanics, 1998
A new approach has been proposed for the simulation of ensembles of spatially correlated accelerograms from an equivalent stationary random field model of the design earthquake motion. This is based on the method of stochastic decomposition and the use of a stationary coherency model.
Manish Shrikhande, Vinay K. Gupta
openaire   +1 more source

Deficiencies of design‐spectrum compatible accelerograms

The Structural Design of Tall Buildings, 1994
AbstractFrequency‐domain scaled, design spectrum compatible acceleration time histories (DSCTH) are widely used in the analysis and design of special structures, particularly seismic‐isolated buildings. At the first glance, it seems that DSCTH records furnish earthquake resistant designers with a consistency and compatibility bridge between the two ...
Farzad Naeim, Marshall Lew
openaire   +1 more source

Unusual accelerograms recorded at Lima, Peru

Bulletin of the Seismological Society of America, 1971
abstract Accelerograms recorded in downtown Lima, Peru, appear to have two unusual characteristics in comparison with accelerograms recorded outside of Peru. First, the predominant period is approximately 0.1 sec, regardless of epicentral distance of earthquakes.
William K. Cloud, Virgilio Perez
openaire   +1 more source

EMPIRICAL MODE DECOMPOSITION OF EARTHQUAKE ACCELEROGRAMS

Advances in Adaptive Data Analysis, 2012
This article analyzes the strong motion records of past earthquakes by empirical mode decomposition (EMD) technique. The recorded earthquake acceleration time histories are decomposed into a finite number of empirical modes of oscillation. The instantaneous frequency and amplitude of these modes and evolutionary power spectral density (PSD) is ...
S. T. G. RAGHUKANTH, S. SANGEETHA
openaire   +1 more source

Representing Earthquake Accelerogram Records for CNN Utilization

2020 28th Signal Processing and Communications Applications Conference (SIU), 2020
In this study, a spectrogram based false color representation of earthquake accelergrams is proposed and its usability for both human investigation and its application in convolutional networks are discussed. By using more than forty two thousand earthquake records open to the public, an epicenter clustering algorithm was employed, and it was observed ...
Cikis, M., Tileyoglu, S., Akagunduz, E.
openaire   +3 more sources

Dislocation mechanism—the Parkfield 1966 accelerograms

Bulletin of the Seismological Society of America, 1973
abstract The 1966 Parkfield earthquake accelerograms are analyzed with particular attention to clarifying the relationship between the observed motions and the crack propagation. The basic finding is that the crack propagation velocity was supersonic relative to the shear-wave velocity.
openaire   +1 more source

Estimating ground motions using recorded accelerograms

Surveys in Geophysics, 1986
A procedure for estimating ground motions using recorded accelerograms is described. The premise of the study is the assumption that future ground motions will be similar to those observed for similar site and tectonic situations in the past. Direct techniques for scaling existing accelerograms have been developed, based on relative estimates of local ...
Heaton, Thomas H., Tajima, Fumiko, Mori, Wildestein   +2 more
openaire   +2 more sources