Examining The Effect Of Structure-Soil Interaction On Structural Behavior


Angın Z., Karahasan O. Ş., İkizler S. B.

International IDU Engineering Symposium, İzmir, Türkiye, 5 - 13 Aralık 2020, cilt.1, sa.1, ss.1-6

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: İzmir
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.1-6
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

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.