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Thursday, July 23, 2020 | History

2 edition of Digital calculation of response spectra from strong-motion earthquake records found in the catalog.

Digital calculation of response spectra from strong-motion earthquake records

Navin C. Nigam

Digital calculation of response spectra from strong-motion earthquake records

by Navin C. Nigam

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Published by Earthquake Engineering Research Laboratory, California Institute of Technology in Pasadena, California .
Written in English


Edition Notes

Statementby Navin C. Nigam and Paul C. Jennings.
ContributionsJennings, Paul C.
ID Numbers
Open LibraryOL13757137M

based on the Conditional Spectrum; (2) response-spectrum matching; and (3) near-fault ground motions and fault-rupture directivity. To encourage consensus and consistency in the state of the practice going forward, recommendations related to selecting and scaling ground motions for design and performance assessment of low-.   Once the response acceleration spectrum is computed the calculation of more sophisticated earthquake engineering parameters, such as spectrum intensity (SI) follows. Spectrum intensity is defined as the integral of pseudo-velocity spectrum .

  Earthquake resistant building codes require earthquake engineering studies which, in order to be performed, need strong motion records as original input data. It is therefore important to make realistic selections and processing of the raw input strong motion records in order to calculate the seismic parameters which will help in the estimation. Strong Motion Earthquake Data Values of Digitized Strong-Motion Accelerograms, Accelerograph image of the Imperial Valley Aftershock at El Centro, California. The Strong Motion Earthquake Data Values of Digitized Strong-Motion Accelerograms is a database of o digitized and processed accelerograph records from.

  Hi, I want to convert a time history record of an earthquake into a response spectrum. I am aware of the theory behind this but would like to locate software th Conversion of Time History to Response Spectrum - Mechanical Acoustics/Vibration engineering - Eng-Tips.   Earthquake Spectra, the professional peer-reviewed journal of the Earthquake Engineering Research Institute (EERI), serves as the publication of record for the development of earthquake engineering practice, earthquake codes and regulations, earthquake public policy, and earthquake investigation reports. The journal is published quarterly in.


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Digital calculation of response spectra from strong-motion earthquake records by Navin C. Nigam Download PDF EPUB FB2

This report presents a numerical method for computing response spectra from strong-motion earthquake records. The method is based on the exact solution to the governing differential equation and gives a three to four-fold saving in computing time compared to a third order Runge-Kutta method of comparable by: Get this from a library.

Digital calculation of response spectra from strong-motion earthquake records. [Navin Chandra Nigam; Paul C Jennings; California Institute of Technology. Earthquake Engineering Research Laboratory.]. A numerical method for computing response spectra from strong-motion earthquake records is developed, based on the exact solution to the governing differential equation.

The method gives a three to four-fold saving in computing time compared to a. A numerical method for computing response spectra from strong-motion earthquake records is developed, based on the exact solution to the governing differential equation.

The method gives a three to four-fold saving in computing time compared to a third order Runge-Kutta method of Cited by: A numerical method for computing response spectra from strong-motion earthquake records is developed, based on the exact solution to the governing differential equation.

The method gives a three to four-fold saving in computing time compared to a third order Runge-Kutta method of. Nigam, NC, and Jennings, P. C., "Digital Calculation of Response Spectra from Strong-Motion Earthquake Records," Earthquake Engineering Research Laboratory, California Institute of 4/5(4).

By the late s and early s, the digitization of analog accelerograph records and the digital computation of ground motion and of the response spectra were developed completely and tested for accuracy. Then, inwith the occurrence of the San Fernando, California, earthquake, the modern era of RSM was launched.

The strongest earthquake motions that have been recorded to date have peak accelerations between 1 g and 3 g, where 1 g (≈ cm s-2) is the acceleration of the Earth's gravity field. It is less clear what threshold of ground motion needs to be exceeded to be considered “strong motion.” Many of the instruments currently in use.

Lecture Earthquake-Response Spectra Reading materials: Sectionsand 1. Introduction The most direct description of an earthquake motion in time domain is provided by accelerograms that are recorded by instruments called Strong Motion Accelerographs.

The accelerograph records three orthogonal components of ground acceleration. Digital Calculation of Response Spectra from Strong-Motion Earthquake Records for computing response spectra from strong-motion earthquake records.

Digital Calculation of Response Spectra from Strong-Motion Earthquake Records. for computing response spectra from strong-motion earthquake records. stages in the calculation of spectra. Calculation of response spectra from strong- motion earthquake records.

Bulletin of Seismological Society of America. v59 i2. Google Scholar; Proakis and Manolakis, 3rd ed. Prentice-Hall International Inc., Englewood Cliffs, NJ. Google Scholar; Robinson et al, A comparison of analog and digital computation of strong-motion earthquake response spectra is made, and it is shown that the preference as to method will depend mainly on availability of computing equipment.

The accuracy of analog response spectrum computations is shown to be compatible with the limitations of the original ground acceleration. The theory about the shock response spectrum (SRS) is discussed in this chapter.

The calculation and application of the SRS is presented in detail. Nigam, N.C., Jennings, P.C.,Digital Calculation of Response from Strong-Motion Earthquake Records, California Institute of Technology, printed in STARDYNE Theoretical Manual, III. DYNRE5.

17 Introduction. 18 Review of the Rocking Response of a Rigid Block. 24 Design Response Spectrum in Nuclear Power Plants. 27 The ASCE Method for estimating maximum rocking angle. 28 Damping in the ASCE Method.

28 Estimation of maximum rocking angle. 30 The ASCE Procedure. 33 Inherent Problems of the ASCE Method. The Earthquake Engineering Online Archive NISEE e-Library SPECEQ/UQ Software and Manuals Text Nigam, Navin Chandra; Jennings, Paul C.; Digital calculation of response spectra from strong-motion earthquake records.

Software-SPECEQUQZIP Nigam, Navin Chandra; Jennings, Paul C.; SPECEQ/UQ: Generation of Response Spectra Digitized at Equal/Unequal Time Intervals. The record may have under-represented the high frequency motions of the ground because of soil-structure interaction of the massive foundation with the surrounding soft soil.

Vibrationdata Programs to Calculate Shock Response Spectrum: SRS page Earthquake Engineering Page Type of Digital Strong-Motion Data: Corrected. Earthquake Design of Concrete Masonry Buildings: Response Spectra Analysis and General Earthquake Modelling Considerations v.

1 by Robert E. Englekirk and a great selection of related books, art and collectibles available now at   Earthquake Spectra and Design (Engineering monographs on earthquake criteria, structural design, and strong motion records) First Edition (US) Third Printing by Nathan M.

Newmark (Author), W. Hall (Author)Reviews: 1. to compare the calculation and application of Fourier Spectra and Response Spectra to earthquake engineering studies of strong-motion ground acceleration data.

ANALOG AND DIGITAL CALCULATION OF RESPONSE SPECTRA The response spectrum is defined as the maximum response of a single degree of. Earthquake Software for Signal Processing of Strong-Motion data SeismoSignal constitutes an easy and efficient way for signal processing of strong-motion data, featuring a user-friendly visual interface and being capable of deriving a number of strong-motion parameters often required by engineer seismologists and earthquake engineers.A response spectrum is a plot of the peak or steady-state response (displacement, velocity or acceleration) of a series of oscillators of varying natural frequency, that are forced into motion by the same base vibration or resulting plot can then be used to pick off the response of any linear system, given its natural frequency of oscillation.Response Spectrum Characteristics We now study the important characteristic of response spectrum of earthquake ground motions.

The response spectrum for north-south component of El Centro ground motion for damping ratio = 0, 2, 5, and 10% is plotted together with the ground motion parameters ugo, u .