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Performance Enhancement of Three-Dimensional Soil Structure Model via Optimization for Estimating Seismic Behavior of Buried Pipelines

Tsuyoshi Ichimura

Earthquake Research Institute, The University of Tokyo, 1-1-1 & Bunkyo-ku, Tokyo 113-0032, Japan

Department of Civil Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

E-mail Address: ichimura@eri.u-tokyo.ac.jp

Corresponding author.

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Kohei Fujita

Earthquake Research Institute, The University of Tokyo, 1-1-1 & Bunkyo-ku, Tokyo 113-0032, Japan

Department of Civil Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

E-mail Address: fujita@eri.u-tokyo.ac.jp

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Atsushi Yoshiyuki

Department of Civil Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

E-mail Address: y-atsu@eri.u-tokyo.ac.jp

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Pher Errol Quinay

Institute of Civil Engineering, University of the Philippines-Diliman, Diliman, Quezon City, Metro Manila, Philippines

E-mail Address: pher_errol.quinay@upd.edu.ph

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Muneo Hori

Earthquake Research Institute, The University of Tokyo, 1-1-1 & Bunkyo-ku, Tokyo 113-0032, Japan

Department of Civil Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

E-mail Address: hori@eri.u-tokyo.ac.jp

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, and

Takashi Sakanoue

Tokyo Gas Co., Ltd, 1-5-20 Kaigan, Minato-ku, Tokyo 105-8527, Japan

E-mail Address: sakanoue@tokyo-gas.co.jp

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https://doi.org/10.1142/S1793431117500191Cited by:3 (Source: Crossref)

Abstract

Damage to buried pipelines due to complex ground responses has been reported at residential development sites and valley plains with complex ground structures. Three-dimensional (3D) ground amplification analyses using 3D, nonlinear, finite-element methods may be effective in predicting such damage; however, it is often difficult to construct ground structures that are capable of reproducing observational characteristics. In this paper, we propose a 3D ground structure optimization method using a 3000 $\times$ forward finite-element dynamic analysis with approximately 0.27 million degrees of freedom, enabled by combining an automated 3D finite-element model-generation method and a fast 3D finite-element wave propagation analysis method. This optimization method is capable of estimating 3D ground structure models that can reproduce observational data characteristics. The effectiveness of the method is shown through an illustrative example.

Keywords:

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