TECHNICAL NOTES
May 1, 1988
Structural Response to Truncated Earthquake Accelerograms
Authors: Sanjeev Srivastav, Student Member, ASCE, and James M. Nau, Associate Member, ASCEAuthor Affiliations
Publication: Journal of Structural Engineering
Volume 114, Issue 5
Abstract
The discontinuity in the ground motion arising from the truncation of earthquake accelerograms may produce inaccuracies in the response of long period structures with low damping. The termination of the ground motion at a point where the acceleration is low and the use of a small time step during free vibration following the truncation of the record generally improve the results. However, these conditions are insufficient to guarantee acceptable results in all cases. An acceleration pulse is described which, when added to the end of the truncated record, eliminates the abrupt termination of the ground motion. The use of this suffixed pulse removes the uncertainty in the selection of the time of truncation and permits the use of a reasonable time step during free vibration.
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References
1.
Pecknold, D. A., and Riddell, R. (1979). Closure to “Effect of Initial Base Motion on Response Spectra.” J. Engrg. Mech. Div., ASCE, 105(6), 1057–1060.
2.
“Strong‐Motion Earthquake Accelerograms, Digitized and Plotted Data, Vol. II, Corrected Accelerograms and Integrated Ground Velocity and Displacement Curves.” (1973). EERL 72‐51, Earthquake Engineering Research Laboratory, California Institute of Technology, Pasadena, Calif., Feb.
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Copyright © 1988 ASCE.
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Published online: May 1, 1988
Published in print: May 1988
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Sanjeev Srivastav, Student Member, ASCE
Res. Asst., Dept. of Civ. and Envir. Engrg., Cornell Univ., Ithaca, NY 14853
James M. Nau, Associate Member, ASCE
Asst. Prof., Dept. of Civ. Engrg., North Carolina State Univ., Raleigh, NC 27695
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