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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Built Environ. | doi: 10.3389/fbuil.2019.00126

Simultaneous approach to critical fault rupture slip distribution and optimal damper placement for resilient building design

Kyoichiro Kondo1 and  Izuru Takewaki2*
  • 1Kyoto University, Japan
  • 2Dept of Architecture and Architectural Engineering, Kyoto University, Japan

The uncertainties in ground motions may result from several factors, e.g. (i) the fault rupture process, (ii) the wave propagation, (iii) the site amplification from the earthquake bedrock to the ground surface. The uncertainty in the fault rupture slip is taken as a main factor of uncertainties in the present paper and the critical fault rupture slip distribution causing the maximum structural response is found by using the stochastic Green’s function method as a generator of ground motions. Then, a multi-degree-of-freedom (MDOF) building structure is introduced as a model structure and an optimal damper placement problem is discussed for the critical ground motion. The main topic in this paper is the simultaneous determination of the critical fault rupture slip distribution and the optimal damper placement. The sequential quadratic programming method is used in the problem of critical fault rupture slip distribution and a sensitivity-based method is introduced in the optimal damper placement problem. Furthermore, the robustness for the maximum interstory drift in MDOF building structures under the uncertainty in fault rupture slip distributions is presented for resilient building design by using the robustness function. Since the critical case leads to the most unfavorable structural response, the proposed method can provide structural designers with a promising tool for resilient building design.

Keywords: critical ground motion, Worst input, Stochastic green's function method, Fault rupture, Wave propagation, Earthquake bedrock, site amplification, optimal damper placement, robustness, resilience

Received: 11 Aug 2019; Accepted: 07 Oct 2019.

Copyright: © 2019 Kondo and Takewaki. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Izuru Takewaki, Kyoto University, Dept of Architecture and Architectural Engineering, Kyoto, 615-8540, Japan, takewaki@archi.kyoto-u.ac.jp