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Distant motions from a building vibration test

Jennings, Paul C. (1970) Distant motions from a building vibration test. Bulletin of the Seismological Society of America, 60 (6). pp. 2037-2043. ISSN 0037-1106.

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Horizontal ground motion generated by vibration tests of the nine-story Millikan Library Building on the Caltech campus was recorded on the surface of the ground in the Pasadena area at distances up to 3 miles from the building. Later it was learned that the vertical component of the motion also was recorded by the seismograph on Mt. Wilson, 6.7 miles from the Library and 4,800 ft higher in elevation. The magnitude of the acceleration varied from 2.04 × 10-^(2)g at the excitation level on the ninth floor of the building to 3.2 × 10^(-7)g at Mt. Wilson. Simple calculations show that multistory buildings are particularly well-suited for inducing large dynamic forces in the ground with relatively small equipment.

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Additional Information:© 1970 Seismological Society of America. Manuscript received June 9 1970. The writer is indebted to Clarence R. Allen, Ronald F. Scott and Francis E. Lehner for operating the seismographic instruments and to Julio Kuroiwa, Fred McDonald, and Rafael Ronderos for assisting with the vibration equipment and the accelerometer-recorder system.
Issue or Number:6
Record Number:CaltechAUTHORS:20140915-093836673
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49693
Deposited By: Tony Diaz
Deposited On:15 Sep 2014 17:30
Last Modified:03 Oct 2019 07:16

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