RESPONSE OF A COLUMN IN RANDOM VIBRATION TESTS

Laboratory experiments were conducted to observe and measure the response amplitude and frequency of a simply supported column. The column was excited by axial forces generated from sinusoidal and random (bandwidths of 3 Hz, 10 Hz, 30 Hz, and 100 Hz) signals. The column will vibrate near its natural frequency if the excitation contains a sufficiently high level power spectral density within the parametric resonance zone of the column. The variance of the response amplitude decreases with increasing bandwidth of excitation. A zero amplitude of response is found during a considerable portion of the excitation time; this indicates there is a discrete component in the probability distribution at zero amplitude.

• Supplemental Notes:
  • Presented at the January 1974 ASCE National Mtg. on Water Resources Engineering, Los Angeles, Calif.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Boxter, G K
  • Evan-Iwanowski, R M
• Publication Date: 1975-9

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 1749-61
• Serial:
  • Journal of the Structural Division
  • Volume: 101
  • Issue Number: ST9
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Amplitude; Columns; Electromagnetic frequencies; Excitation; Power spectra; Resonance; Vibration
• Old TRIS Terms: Response
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00127201
• Record Type: Publication
• Report/Paper Numbers: ASCE #11568 Proceeding
• Files: TRIS
• Created Date: Dec 29 1975 12:00AM