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A deterministic approach for assessing tsunami-induced building damage through quantification of hydrodynamic forces

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posted on 2019-01-14, 14:04 authored by Yan Xiong, Qiuhua LiangQiuhua Liang, Hyoungsu Park, Daniel Cox, Gang Wang
In certain coastal areas across the globe, tsunamis pose a great threat to buildings, infrastructure and people's lives. The prevailing approaches for assessing building damage are based on probabilistic analysis. This paper introduces a new deterministic approach to assess large-scale building damage through quantifying lateral loading on structures induced by tsunami waves. A depth-averaged hydrodynamic model is adopted to simulate tsunami propagation and inundation and calculate the induced pressures and forces on structures. The model solves the 2D nonlinear shallow water equations (SWEs) using a finite volume shock-capturing numerical scheme and is implemented on Graphics Processing Units (GPUs) to achieve high-performance computing for large-scale applications. A new model component is included to calculate pressures and forces using the predicted flow variables, i.e. water depth and velocities. The resulting maximum tsunami forces are combined with a lateral force resisting system on each building to estimate damage states. This new approach is developed by taking advantages of a similar damage assessment method and the corresponding coefficients for quantifying earthquake impact on buildings, due to the similarity between the horizontal force systems induced by tsunami waves and earthquake motions. After being successfully validated against three experimental cases related to flow hydrodynamics, pressures and forces, the model is used to simulate a hypothetical 1000-year tsunami event in the City of Seaside, Oregon, USA. The resulting damage states are then classified for each of the urban buildings in the area, taking into account different building types. The predicted results are consistent with those obtained using alternative approaches, confirming the potential of the proposed approach for practical engineering applications.

Funding

This work is supported by the China Scholarships Council (No. 201606710054), the National Natural Science Foundation of China (NSFC) through a standard research award (Ref. 51379074), Special Basic Research Fund for Zhejiang Institute of Hydraulics & Estuary (2017F30013), and the State Major Project of Water Pollution Control and Management (2017ZX07603-001).

History

School

  • Architecture, Building and Civil Engineering

Published in

Coastal Engineering

Volume

144

Pages

1 - 14

Citation

XIONG, Y. ... et al, 2018. A deterministic approach for assessing tsunami-induced building damage through quantification of hydrodynamic forces. Coastal Engineering, 144, pp.1-14.

Publisher

© Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Coastal Engineering and the definitive published version is available at https://doi.org/10.1016/j.coastaleng.2018.11.002.

Acceptance date

2018-11-16

Publication date

2018-11-17

ISSN

0378-3839

Language

  • en