## Abstract

Consider the simple beam structure shown in Figure 27.1. The properties of the beam are as follows: E=3x10
Determine the forces in the structure and the displacement at the top (relative to the base) produced by this excitation. This is a typical baseexcitation problem, also called an enforced acceleration problem. This class of problems is of considerable interest in earthquake engineering.

^{6}psi,*v*=.3333, and*p*(mass per unit of volume) = 7x10^{-4}llb-s^{2}/in^{4}. The beam is excited by a base acceleration f(t) in the y-direction given in units of in/s^{2}by$$
{\rm{f(t) = - }}{e^{{\rm{ - t}}}}\cos (2\pi {\rm{t}})
$$

(27.1)

## Keywords

Case Control Relative Displacement Executive Control Earthquake Engineering Natural Period
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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## Copyright information

© Springer-Verlag New York Inc. 1989