Abstract
The paper studied the vibrations of the buildings on the sliding foundation with dry friction under the action of real earthquakes at the intensity of 8 and 9 on the MSK-64 scale. It was developed a unique algorithm for calculating the displacements, velocities, accelerations, and shear forces resulting from the simultaneous action of the horizontal and vertical components of the seismogram record. It was studied four-story and nine-story buildings under the set of the three earthquake records. It was shown that the use of a sliding foundation does not always lead to a significant reduction in the shear force on the building floors and that the vertical component of the seismic effect has a significant influence on the shear vibration of the building.
Highlights
In recent decades, various measures have been taken in countries worldwide to protect the buildings and structures from the unfortunate effects of the strong earthquakes [1,2,3,4,5,6]
The seismic isolation was modeled as dry friction, but the dry friction model is replaced by an "Ideal elastoplastic body" model during implementation
Let the horizontal and vertical motions of the building foundation be given as a seismogram of the real earthquake
Summary
Various measures have been taken in countries worldwide to protect the buildings and structures from the unfortunate effects of the strong earthquakes [1,2,3,4,5,6]. One effective method of the seismic isolation is the sliding foundation using a layer of fluoroplastic [2, 3]. In [4], a study of seismic isolation in the pipeline system in the form of Teflon interlayer was carried out. The seismic isolation was modeled as dry friction, but the dry friction model is replaced by an "Ideal elastoplastic body" model during implementation. In [5], a study of seismic vibrations of the multi-story building with sliding support is given. In [6], the results of studies of the high-rise building with an application of the seismic isolation in the form of the steel- laminated rubber bearings are given
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