000015928 001__ 15928
000015928 005__ 20161115135333.0
000015928 04107 $$aeng
000015928 046__ $$k2013-06-12
000015928 100__ $$aNakamura, N.
000015928 24500 $$aEarthquake Response Analyses of Soil-Structure Interaction System Using Nonlinear Energy Transmitting Boundary

000015928 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015928 260__ $$bNational Technical University of Athens, 2013
000015928 506__ $$arestricted
000015928 520__ $$2eng$$aThe energy-transmitting boundary, which is used in the well-known FEM program FLUSH, is a quite efficient technique for the earthquake response analysis of buildings considering soil-structure interaction. However, it is applicable only in the frequency domain. The author has studied and proposed methods for transforming frequency dependent soil impedance into the time domain. In the previous paper, the author proposed an earthquake response analysis method using the energy transmitting boundary in the time domain using the transform method, because the kernel of the boundary is the frequency dependent impedance full matrix. Then, an earthquake response analysis with a nonlinear building using the boundary was carried out, and the accuracy and the efficiency of the boundary were confirmed. In that analysis, the inner field (the region inside the boundary) could be treated as the nonlinear system, but the free field (the region outside the boundary) and the boundary were treated as the linear system. Contrary to this, in this paper, the nonlinear transmitting boundary is proposed. By using it, all of the inner field, the free field and the boundary itself can be treated as the nonlinear system. The boundary impedance matrix is calculated in the frequency domain corresponding to the condition of the free field at the specific times. Then, these impedance matrices are transformed to the impulse response matrices in the time domain. In the nonlinear response analysis of the total system, the transmitting boundary at each time step is obtained by interpolation of these impulse response matrices between the specific times. Then, example earthquake response analyses were performed using a practical soil and building model to evaluate the soil-structure interaction effect. The response accuracy was compared with the cases of viscous boundary, which is the most common and representative boundary in the time domain. It was shown that the area of the inner field can be greatly reduced by using the proposed method because the accuracy of the boundary is quite high. Therefore, it was confirmed that the proposed method is effective.

000015928 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015928 653__ $$aTransmitting boundary, Frequency Dependency, Nonlinear, Soil Impedance, Time History Response Analysis.

000015928 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015928 720__ $$aNakamura, N.
000015928 8560_ $$ffischerc@itam.cas.cz
000015928 8564_ $$s751329$$uhttps://invenio.itam.cas.cz/record/15928/files/1718.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 13 DYNAMIC SOIL STRUCTURE INTERACTION MODELING AND SIMULATION
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000015928 962__ $$r15525
000015928 980__ $$aPAPER