Accession Number : AD0029637


Title :   A SIMPLE APPROXIMATION FOR THE FUNDAMENTAL FREQUENCIES OF TWO-SPAN AND THREE-SPAN CONTINOUS BEAMS


Corporate Author : ILLINOIS UNIV AT URBANA-CHAMAPIGN


Personal Author(s) : Veletsos, A S ; Newmark, N M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/029637.pdf


Report Date : Feb 1954


Pagination or Media Count : 21


Abstract : A rapid approximate method is presented for calculating the fundamental frequencies of flexural vibration of two-span beams and of particular arrangements of three-span beams which are continuous over non-deflecting supports and are elastically restrained against rotation at their end supports. The end restraints nisy be provided by actual coil springs or they may represent the effect of adjoining members, but in all cases the stiffnesses of these restraints are assumed to be positive. The mass per unit of length and the flexural rigidity of the beams may vary from one span to the next, but in any one span these quantities are considered constant. Two nuinerical examples are included to illustrate the application of the method.


Descriptors :   *VIBRATION , *BEAMS(STRUCTURAL) , MATHEMATICAL ANALYSIS , LENGTH , RESTRAINT , RIGIDITY , FLEXURAL PROPERTIES


Subject Categories : Mechanics
      Civil Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE