Damage scenario

A considerable number of references discuss imaging algorithms that are entirely data driven and do not require a structural model. Similar to the passive damage diagnostic approach, NN have been proposed that would be trained on a number of damage scenarios and then used to identify an actual damage however, this data-driven approach seems to require a large number of tests and could be cost prohibitive. 

Database and simulator supported accident management strategies for the postulated core damage scenarios... 

The SARDB consists ofhundreds ofcalculationresults for significant core damage scenarios by using integrated severe accident analysis codes, for example, MAAP (FAl, 1994) or MELCOR (USNRC, 1990). It includes most of the high frequency accident sequences which are selected from the plant damage state event tree of a level 2 probabilistic safety analysis... 

The K-, L-, or P-Reactor Disassembly Basin (secondary confinement) Mure is bounded by the DBE event (Section 8.3.1.3), v ch includes several basin damage scenarios. 

Modro, S. M., Carboneau, M. L. The LP-FP-2 severe fuel damage scenario Discussion of the relative influence of the transient and reflood phase in affecting the final condition. Proc. Open Forum The OECD Loft Project Achievements and Significant Results. Madrid, Spain, 1990, p. 388-402... 

In what follows, one PDT damage scenario will be investigated in more detail settlement of one of the central piers (Figure 3). 

However, the precision of the identification is not the same for all parameters. In fact, the stiffness parameter 0i is identified with a coefficient of variation (COV) that is significantly greater than the other stiffness parameters, whereas the first two damping ratios and 2 are identified with a lower uncertainty than the others. These differences, which occur also when the other damage scenarios are considered, can be explained by a sensitivity analysis. 

Figure 6 Probability of failure P s for the structure with deterministic capacity parameters for different damage scenarios.

Table 3 Probability P s of exceeding the considered limit states for different damage scenarios and...

In general, the uncertainty in the definition of the limit state does not produce a large difference in the failure probability Pls- Comparing the values of the probability Pls for deterministic and uncertain capacity parameters, it can be observed that the uncertainty of the parameters plays a significant role for the damage scenarios UD, DM2 and DM5. 

Earthquake damage scenario software for urban areas... 

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). 

As already mentioned the healthy (H) and six damage scenarios (A to F) are considered in SHM, with 40 data records used in each health state. 

A summary of the methods reviewed above is presented in Table 1. While this is by no means an exhaustive list of the many applications of seismic vulnerability assessment for masonry structures available in literature, it concentrates on procedures that have been specifically developed for vulnerability assessment at territorial scale. For this reason procedures aimed at the assessment of single buildings are not included. The choice of the most suitable procedure is highly dependent on the resources available for the data collection, the computational expertise available, and ultimately the scale and aim of the study. Empirical procedures can be used for fairly large-scale studies to define damage scenarios however, if the purpose of the study is to identify within a district or urban center specific buildings in need of strengthening, so as to increase their seismic capacity, then a suitable analytical procedure should be preferred. 

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