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Figure 21. Comparison of experimental and numerical behaviors of device without the aluminum plate:
a) 20 kN and b) 40 kN panel
and at G , respectively, the angular velocity ω and
the angular acceleration α. Since transversal and
longitudinal accelerations have been measured
in points 1 and 2 of each floor (Figure 24a), the
aforementioned kinematic parameters had been
evaluated and, by means of the constrain equa-
tions representing the rigid floor (see the equations
in Figure 24b), the longitudinal and transversal
accelerations in correspondence of the East and
West panels were determined.
Observing that these accelerations are di-
rectly proportional to the inertia loads that acts
on each panel, it is possible to use longitudinal
acceleration al W and al E and measured transversal
displacements of each panel to describe, at least
qualitatively, the hysteresis cycle. These graphs
have been plotted for each test condition and for
each panel. In particular, Figure 25 shows the
hysteresis cycles for the panels mounted on the
first floor, where shear loads originated by seismic
action is maximum. The plots are referred to a
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