ASSESSMENT OF THE INFLUENCE OF THE ROTATIONAL COMPONENTS OF SEISMIC ACTION ON THE SSS OF A MULTISTOREY REINFORCED CONCRETE BUILDING

Abstract

The urgent task of earthquake-resistant construction is to improve the methods of calculating the seismic effect. Currently, most calculations for seismic effects are made taking into account only the translational components of the earthquake. However, seismic soil rotations make a tangible contribution to the dynamic response of structures that are sensitive to the wave effect of seismic impact. Modern studies show that building structures have a spatial nature of work, and in calculations for seismic loads, in addition to three translational components, it is necessary to consider the impact on buildings and structures from additional three rotational components. The purpose of this work is to assess the influence of rotational components on the stress-strain state of a multielement reinforced concrete building. In the course of the work, calculations of a reinforced concrete building were made without taking into account and taking into account the rotational components of the seismic impact, based on the results of which a comparative analysis was made. The calculation for the earth-quake was performed by an explicit direct dynamic method of central differences in the LS-DYNA software in six settings: the action of the translational component is set along the X axis; the action of the translational com-ponent is set along the X axis and rotational component – relative to the Y axis; the action of the translational component is set along the Y axis; the action of the translational component is set along the Y axis and rotational component – relative to the X axis; the impact of three translational components; the action of three translational and three rotational components. As a result of a comparative analysis of the obtained displacements and stresses, it was concluded that taking into account rotational components does not make a tangible contribution to the SSS of the building under consideration.