The Earthquake Engineering Online Archive

Studies on high-frequency vibrations of buildings - 1: the column effect

Lubliner, Jacob

UCB/EERC-79/21, Earthquake Engineering Research Center, University of California, Berkeley, 1979-08, 30 pages (555/L82/1979)

It is shown that, when column mass is taken into account in the vibration of buildings, the system acquires additional degrees-of-freedom. If column mass is small compared to floor mass, then the modes obtained from conventional analysis persist virtually unchanged; the additional modes involve almost exclusively column motion, the characteristic frequencies being in the low audio range. The nature of the modes, as well as the transmission of ground motion, depend upon whether the columns in adjacent stories are tuned to each other.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-79-21.pdf (552 KB)