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Laboratory evaluations and instrument corrections of strong-motion accelerograms

Trifunac, Mihailo D. and Hudson, Donald E. (1970) Laboratory evaluations and instrument corrections of strong-motion accelerograms. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechEERL:1970.EERL-70-04

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Abstract

Since the first strong-motion accelerographs for the measurement of the ground motion associated with destructive earthquakes appeared in the early 1930's there has been a continual development of instruments and data handling techniques. These developments have resulted in improved field reliability, increased frequency response range, better resolution and accuracy, and reduced costs. As new instrument types appear it is necessary to carry out comprehensive programs of laboratory and field evaluation to ensure adequate performance capabilities. The advent of high speed digital computer systems has completely altered data processing procedures associated with strongmotion instrumentation. Modern digitization and digital filtering techniques, for example, have made it possible to use new approaches to transducer design, and to the optimal retrieval of information from instrument records. The Earthquake Engineering Research Laboratory of the California Institute of Technology considers the continued reliable operation, expansion, and data processing functions of a network of strong-motion accelerographs to be one of the key requirements of earthquake engineering research. To this end, this laboratory has for many years conducted numerous studies and research programs aimed at improvements in all aspects of this subject. In cooperation with the Seismological Field Survey of the U. S. Coast and Geodetic Survey, the Caltech group has been engaged in accelerograph design, testing, network design and installation, accelerogram digitizing and corrections, and the use of accelerograms for structural response determinations. The present report brings together a number of special studies related to accelerograph evaluations and data processing, which may be of interest to others engaged in instrument development or in the use of accelerograph records. It is our feeling that the best use can be made of the basic data only by those persons thoroughly familiar with the details of instrument design, and the special problems that may be associated with both the basic measurements themselves and with the handling and interpretation of the data. Some repetition of test method descriptions has been retained to ensure a reasonable independence of the various sections.


Item Type:Report or Paper (Technical Report)
Group:Earthquake Engineering Research Laboratory
Record Number:CaltechEERL:1970.EERL-70-04
Persistent URL:http://resolver.caltech.edu/CaltechEERL:1970.EERL-70-04
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:26271
Collection:CaltechEERL
Deposited By: Imported from CaltechEERL
Deposited On:19 Feb 2008
Last Modified:26 Dec 2012 13:55

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