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Interaction and Multiscale Mechanics
  Volume 2, Number 1, March 2009, pages 91-107
open access

A study on nonlinear seismic response analysis of building considering frequency dependent soil impedance in time domain
Naohiro Nakamura

    In order to accurately estimate the seismic behavior of buildings, it is important to consider both nonlinear characteristics of the buildings and the frequency dependency of the soil impedance. Therefore, transform methods of the soil impedance in the frequency domain to the impulse response in the time domain are needed because the nonlinear analysis can not be carried out in the frequency domain. The author has proposed practical transform methods. In this paper, seismic response analyses considering frequency dependent soil impedance in the time domain are shown. First, the formulation of the proposed transform methods is described. Then, the linear and nonlinear earthquake response analyses of a building on 2-layered soil were carried out using the transformed impulse responses. Through these analyses, the validity and efficiency of the methods were confirmed.
Key Words
    frequency dependency; time domain; earthquake response; soil impedance; impulse response.
R&D Institute, Takenaka Corporation, 1-5-1, Ohtsuka, Inzai, Chiba, 270-1395, Japan

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