Akademik Veri Yönetim Sistemi
International IDU Engineering Symposium, İzmir, Türkiye, 5 - 13 Aralık 2020, cilt.1, sa.1, ss.1-6
Since
the structural behavior of engineering structures are determined by dynamic
characteristics, they must be obtained by
analytical and experimental methods. In the analytical method; The modal
analysis of the finite element models created by considering the geometry of
the building, material properties and support conditions, and soil properties
are made and dynamic characteristics are obtained. Mechanical, geometric and
dynamic properties of soils affect the parameters transferred to the structure.
The evaluation made without taking this effect into account does not reflect
the real situation and causes an erroneous evaluation. Soil properties affect
the structural behavior in various ways. The pore water that occurs on the
ground can cause liquefaction by the effects of earthquake. Soil properties
affect the frequencies, mode shapes and damping ratios (dynamic
characteristics) of the structure. In structural analysis, the building is
designed that has sufficient strength and durability, and the ground floor
columns are modeled as fixed or pinned support. However, the effect of the soil
on the superstructure can not be fully taken into account in the design made in
this way. The displacement value at the top of the superstructure is more
obtained in soft soils. In medium-hard soils, the period of the soil may
coincide with the period of the building and a situation called resonance may
occurs. Considering such situations, it is clearly seen that structure-soil interaction
is a remarkable phenomenon. In this study, finite element analyzes are carried
out to determine the structural behavior of the structure on different soils.
Thus, by examining the changes in the structural behavior caused by the modeled
soil, the effect of the structure-soil interaction is tried to be revealed. For
this purpose, three-dimensional soil and building models are created using the
ANSYS finite element program and the ANSYS library is used. Comparisons made
between models with different soil properties reveal how effective it is to
take into account the interaction of structure-soil.