Abiru, Tetsuo

Advances on Soil-Structure Interaction Analysis Through the Simulation of Forced Vibration Tests for a Building Model on the Actual Ground

Abstract eng:
We presented about the forced vibration tests for a large-scale reinforced concrete building model constructed on the actual site ground with various backfill conditions and confirmed the applicability of conventional design method for linear soilstructure interaction behavior with the embedment effects in case of limited range of soil improvement [1]. Based on the previous study, this study focuses on more detail analyses of a number of vibration tests using large exciter in which nonlinear soil-structure interaction behavior was observed. The brief overview of this paper is as indicated below. First, microtremor observation analyses before and after a number of forced vibration tests using large exciter show that nonlinear soil-structure interaction behavior is caused by not plastic phenomena of soil or building itself but the change of boundary condition between soil and building. Second, more detail analyses of a number of forced vibration tests using large exciter are performed from the viewpoints of harmonic components and chronological change of response records of the soil surrounding the building. Their results show the geometrical nonlinear effect such as contact, slip and separation phenomena between side soil and building in a qualitative manner. Finally, to understand nonlinear soil-structure interaction behavior in more detail, numerical simulation analyses of soil-structure interaction (SSI) are performed comparing to the test results. To take into account for contact, slip and separation phenomena which were observed between surrounding soil and building based on the above test results, the joint elements are introduced in the soil-structure interface. Using 3-dimensional finite element method (3-D FEM) for SSI with joint parameters such as friction coefficient between soil and building, simulation analyses for the a number of vibration tests using not only small but also large exciters are achieved to confirm the applicability of more suitable model for evaluating the embedment effects.

Contributors:

Nozawa, Takashi

Conference Title:

Proceedings of the 16th World Conference on Earthquake Engineering

Conference Title:

16th World Conference on Earthquake Engineering

Conference Venue:

Santiago (CL)

Conference Dates:

2017-01-09 / 2017-01-13

Rights:

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