DEPENDENCE OF SEISMIC IMPACTS ON THE PRESSURE VALUE UNDER THE FOUNDATION

Abstract

Data obtained on the engineering seismometric stations during earthquakes indicate a significant discrepancy between the accelerations of the foundations and the free surface of the ground. There are also numerous results of simultaneous registration of ground displacements and accelerations at different depths during an earthquake. Despite the obvious influence of pressure on the manifestation of the intensity of seismic oscillations, this factor is not taken into account in the calculations of buildings and structures. In order to quantitatively assess the influence of external pressure on the magnitude of seismic loads, experimental studies were carried out on a simplified model of a multi-story frame building, constructed from the condition of equal accelerations.

It has been experimentally established that a significant increase in external pressure on the ground leads to a decrease in the degree of seismic impact on structures.