- BASES AND FOUNDATIONS, UNDERGROUND STRUCTURES
- Reverse Effect of Structures on Movement of Foundation Soil under Seismic Impacts
- UDC 624.151
Leonid V. NUZHDIN1,2, e-mail: nuzhdin_ml@mail.ru
Viktor S. MIKHAYLOV3, e-mail: vsmikhailov@mail.ru
Irina D. YANKOVSKAYA4, e-mail: i.jankovskaya@sipi38.ru
1 Novosibirsk State University of Architecture and Civil Engineering, ul. Leningradskaya, 113, Novosibirsk 630008, Russian Federation
2 Perm National Research Polytechnic University, Komsomolskiy prosp., 29, Perm 614990, Russian Federation
3 Scientific and Technical Support Center "SCADSOFT Novosibirsk", ul. Narymskaya, 23, Novosibirsk 630132, Russian Federation
4 Siberian Institute of Design and Research, ul. Baykalskaya, 105a, Irkutsk 664047, Russian Federation
Abstract. The main goal of the presented research is to determine the range and conditions of civil engineering objects, where it is necessary to take into account the effect of interaction between the structure and the base in seismically active areas of construction. Such verification is mandatory according to the norms of nuclear power engineering and can be recommended when realizing the combined asymptotic method for calculation of platform models "Construction - Absolutely Rigid Foundation - Deformative ground base" in the interface of the SCAD Office when constructing objects of civil engineering. The obtained results of the numerical study show the necessity of taking into account reverse influence of fluctuations of the structure on the foundation both of civilian objects and structures of the nuclear industry. The reverse effect of the building leads to a change in the movement of the ground base under the foundation slab compared to the free field of surface movement under the same seismic conditions. Therefore, the accelerograms, taken in the calculation, for 60% of the cases considered should be changed in comparison with the free field accelerograms. Modified accelerograms should take into account the appropriate stress state of soil massif under the foundation slab, the foundation depth and stiffness characteristics of the reinforced or pile foundation.
Key words: seismic impact, interaction of structures with the base, foundation slab, combined asymptotic method, SCAD Office software package. - REFERENCES
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