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Seismic scenarios

Deterministic Seismic Hazard Analysis (DSHA) analysis is simple and more prevalent methods of hazard analysis in geotechnical earthquake engineering. DSHA involves the development of a particular seismic scenario upon which a ground motion hazard evaluation is based. The scenario consists of the postulated occurrence of an earthquake of a specified size occurring at a specified location. DSHA is more logical, more transparent, and more appropriate for requirements in engineering design. DSHA... [Pg.26]

By using geospatial data, one can develop useful scenarios to improve the knowledge on the structural vulnerability of the urban built infrastructure. Through the analysis of urban seismic risk for different classes of seismic scenarios, the city stakeholders can create a risk management plan for defining the actions for rehabilitation needs in order to improve the seismic safety of constructions and important infrastructure lifelines, thus improving the institutional response and the preparedness of the population in case of a possible earthquake. [Pg.66]

For the deterministic scenarios, we considered three simulated artificial earthquakes with different Peak Ground Accelerations. Based on different levels of the PGA, we can make different seismic scenarios regarding the degree of damage of the buildings in a selected area of the city, presented in Fig. 5.1. [Pg.68]

Sousa, M.L., Campos Costa, A., Carvalho, A. c Coelho, E. 2004. An Automatic Seismic Scenario Loss Methodology Integrated on a Geographic Information System. 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada, August 1-6, Paper No. 2526. [Pg.390]

The issue of resilience of lifelines and critical facilities is of utmost priority for the preparedness and mitigation of seismic risk a good evaluation of the resilience of the lifelines for different seismic scenarios and the implementation of pro-seismic actions to improve it are of major importance. In other words, lifeUne companies, public administration, and community need to be prepared and less vulnerable, in order to achieve a high resilience. In the last years, as the idea of the necessity of building disaster resilient communities gains acceptance, new methods have been proposed to quantify resilience beyond estimating losses. Because of the vastness of the definition, resilience necessarily has to take into account its entire complex and multiple dimensions, which includes technical, organizational, social, and economic facets (Cimellaro et al. 2010). [Pg.851]

Combining global value evaluation and vulnerability assessment and using, if necessary, an expert opinion, it is possible to estimate priorities and to account for the economic and social losses, for a specific utility system and a given seismic scenario. Recovery activities... [Pg.862]

The FaMIVE algorithm produces vulnerability functions in terms of ultimate lateral capacity for different building typologies and quantifies the effect of strengthening and repair intervention on reduction of vulnerability. In its current version, it also computes capacity curves and performance points and outputs fragility curves for different seismic scenarios in terms of intermediate and ultimate displacements or ultimate acceleration. Within the FaMIVE database, capacity curves and fragility functions are available for... [Pg.3169]

Uncertainty can assume different forms and can arise from different sources. Uncertainty may arise from expert opinions/judgments, qualitative assessments (Vick 2002), measurement error (or measurement uncertainty), and/or the reliability of the source of information (Klir 2006). For example, probabilistic seismic hazard analysis combines information from geologic evidence and identification of fault locations with data from previous seismic events (Cornell 1968 Vick 2002). In loss estimations, expert opinions are often integrated with knowledge of previous earthquake events for the prediction of damage and losses of seismic scenarios that may contain little or no data (ATC 1985). This is particularly the case for large (high intensity), rare earthquake events. [Pg.3837]

There are two different methods for quantifying the seismic hazard - based on deterministic approach and probabilistic approach. The deterministic seismic hazard analysis (DSHA) does not consider the uncertainties involved in the earthquake occm-rence process like the recurrence rate, magnitude uncertainty, attenuation characteristics of seismic waves etc. and gives the worst scenario of ground acceleration. Probabilistic seismic hazard analysis (PSHA) incorporates the uncertainties involved in the earthquake occurrence process. Since the uncertainty in earthquake occurrence is fully accounted in this method, this method is being widely followed for the evaluation of seismic hazard. The PSHA method adopted in this study... [Pg.9]

A grid system with cells of 250 m x 250 m was adopted for the damage scenario computations. The regional seismic hazard was evaluated based on a time dependent Poisson model for the return period of 475 years that corresponds approximately to 10% probability of exceedance in 50 years (Erdik et al., 2004, 2005). PGAs and spectral accelerations at T = 0.2 s and T = 1 s were calculated for each cell on the engineering bedrock outcrop (Figure 2). [Pg.382]

This issue was identified from safety reviews and represents a deviation from international practice and especially from NUSS 50-C-D. Insufficient or lacking qualification of equipment important to safety with respect to extreme environmental or seismic conditions would seriously affect defence in depth and the safety functions would be questionable for scenarios within the DB envelope. [Pg.20]

Safety-related components will resist seismic loads under the reference site design. Initiating events for accident scenarios in the area include the crash of military aircraft at the site. [Pg.179]


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See also in sourсe #XX -- [ Pg.66 , Pg.68 ]




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