Performance-Based Tsunami Engineering methodology for risk assessment of structures

Attary, Navid; Unnikrishnan, Vipin U.; Lindt, John W. van de; Cox, Daniel T.; Barbosa, André R.

doi:10.1016/j.engstruct.2017.03.071

Cited by 56 publications

(32 citation statements)

References 35 publications

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“…Park et al (2017) employed these new fragility curves and specified the maximum momentum flux as an IM to estimate possible tsunami-induced building damage in Seaside, Oregon, USA. Attary et al (2017) proposed a hybrid fragility function using both lateral forces and water depth as IMs for a three-story steel building in order to take into account the interaction between the flows and structures. Recently, Petrone et al (2017) suggested that the peak tsunami force is a more effective IM than flow velocity and inundation depth in defining fragility curves.…”

Section: Introductionmentioning

confidence: 99%

“…FEMA (2012) also explained that not all of these tsunami loads affect a particular structural component at the same time. Yeh et al (2014) analysed the time-varying combined force induced by tsunami waves and indicated that the most dangerous moment was when the first peak force directly acting on the front wall of a coastal structure, which is conventionally estimated to be 1.5 times of the subsequent hydrodynamic force (Attary et al, 2017;FEMA, 2012;Yeh et al, 2014). However, this assumption is not based on strong laboratory and field evidences and therefore the most dangerous maximum force is still largely undefined.…”

Section: Introductionmentioning

confidence: 99%

“…Park et al (2017) adopted the fragility curve analysis in HAZUS-MH to assess tsunami damage. Attary et al (2017) proposed a methodology to characterize the interaction between the structures and tsunami waves by utilizing the lateral force resisting system and building classification available in HAZUS-MH. Taking a three-story steel frame building as an example, their method uses empirical fragility functions and is not applicable to large-scale building damage assessment.…”

Section: Introductionmentioning

confidence: 99%

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

Xiong

Liang

Park

et al. 2019

Coastal Engineering

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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 output maximum tsunami forces are combined with a lateral force resisting system on each building to estimate the 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 the 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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Xiong

Liang

Park

et al. 2019

Coastal Engineering

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“…These results FIGURE 10 | Annual exceedance probability (AEP) of hmax (A) and (M F )max (B) at Points 1 (black solid), 2 (red dash), and 3 (blue dash-dot). are helpful to understand realistic input conditions of flow depth and velocity fields for different Fr regime that can be used to develop the tsunami fragility curves, which utilize the random combinations of h max and flow velocity in the generation of fragility curves (Attary et al, 2017a;Attary et al, 2017b;Alam et al, submitted 2 ). In addition, it is worth noting that the maximum flow depth and momentum flux typically do not occur at the same time (Park et al, 2013).…”

Section: Tsunami Intensitymentioning

confidence: 99%

Probabilistic Seismic and Tsunami Hazard Analysis Conditioned on a Megathrust Rupture of the Cascadia Subduction Zone

Park

Cox

Alam

et al. 2017

Front. Built Environ.

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This paper presents a methodology for probabilistic hazard assessment for the multihazard seismic and tsunami phenomena [probabilistic seismic and tsunami hazard analysis (PSTHA)]. For this work, a full-rupture event along the Cascadia subduction zone is considered and the methodology is applied to a study area of Seaside, Oregon, which is located on the US Pacific Northwest coast. In this work, the annual exceedance probabilities (AEPs) of the tsunami intensity measures (IMs) are shown to be qualitatively dissimilar to the IMs of the seismic ground motion in the study area. Specifically, the spatial gradients for the tsunami IM are much stronger across the length scale of the study area owing to the physical differences of wave propagation and energy dissipation of the two mechanisms. Example results of probabilistic seismic hazard analysis and probabilistic tsunami hazard analysis are shown for three observation points in the study area of Seaside. For the seismic hazard, the joint mean annual rate of exceedance of IMs shows similar trends for the three observation points, even though for a given observation point there is a large scatter between two ground-motion IMs analyzed, which were peak ground acceleration (PGA) and spectral acceleration at a period of vibration of 0.3 s, i.e., PGA and S a (T 1 = 0.3 s). For the tsunami hazard, the joint AEP of maximum flow depth (h max ) and maximum momentum flux ((M F ) max ) shows a high correlation between the two IMs in the study area. The joint AEP at each of the three observation points follows a particular Froude number (Fr) due to the local site-specific conditions rather than the distributions of fault slip distributions used to generate the scenarios that are the basis of the AEP maps developed. The joint probability distribution of h max and (M F ) max throughout the study region falls between 0.1 ≤ Fr < 1.0 (i.e., the flow is subcritical), regardless of return interval (500-, 1,000-, and 2,500-year). However, the peak of the joint probability distribution with respect to h max and (M F ) max varies with the return interval, and the largest values of h max and (M F ) max were observed with the highest return intervals (2,500 years) as would be expected. The results of the PSTHA can be the basis for a probabilistic multi-hazard damage and loss assessment and help to evaluate the uncertainties of the multi-hazard assessments.

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“…The concept of PBTE is not entirely new (Attary et al 2017); however, it has not been fully developed nor rigorously implemented in tsunami engineering. Given the similarity and commonality of earthquake and tsunami hazards (i.e.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Tsunami Loss Estimation Methodology: Stochastic Earthquake Scenario Approach

Goda

Risi

2017

Earthquake Spectra

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms The Professional Journal of the Earthquake Engineering Research Institute PREPRINTThis preprint is a PDF of a manuscript that has been accepted for publication in Earthquake Spectra. It is the final version that was uploaded and approved by the author(s). While the paper has been through the usual rigorous peer review process for the Journal, it has not been copyedited, nor have the figures and tables been modified for final publication. Please also note that the paper may refer to online Appendices that are not yet available.We have posted this preliminary version of the manuscript online in the interest of making the scientific findings available for distribution and citation as quickly as possible following acceptance. However, readers should be aware that the final, published version will look different from this version and may also have some differences in content.The DOI for this manuscript and the correct format for citing the paper are given at the top of the online (html) abstract.Once the final, published version of this paper is posted online, it will replace the preliminary version at the specified DOI. Probabilistic Tsunami Loss Estimation

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Performance-Based Tsunami Engineering methodology for risk assessment of structures

Cited by 56 publications

References 35 publications

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

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

Probabilistic Seismic and Tsunami Hazard Analysis Conditioned on a Megathrust Rupture of the Cascadia Subduction Zone

Probabilistic Tsunami Loss Estimation Methodology: Stochastic Earthquake Scenario Approach

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