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In this section, we are going to demonstrate the Network-based Seismic Retrofit (NBSR) Analysis, one of the advanced features included in MAEviz. Given a particular budget constraint, MAEviz will recommend a retrofit strategy for the set of bridges to minimize the change in total system travel time (TSTT). Similar to the building decision support, we are going to need more data in order to effectively use the decision support tools. We don't have all of the data for running the Charleston bridges as an example so we are going to switch gears and build a new scenario with Shelby County Tennessee as our region of interest. You will need to follow the previous steps for creating a new scenario with the following changes:
- Choose Shelby County, Tennessee as the region of interest
- For the default set, choose MAEviz 3.1.1 Analysis Defaults
Conclusion
Based on this simple bridge damage analysis, we can conclude that the MAEviz tool helps to identify areas of high risk. MAEviz could also have been used to look at some mitigation options that may be beneficial to consider. The Emergency Manager in our example is able to take the information and results from this analysis and evaluate detailed options for specific bridges based on proprietary information in the department's databases and files. Furthermore, probabilistic scenarios can also be evaluated in addition to a deterministic earthquake such as the one we used in this example to provide for a wider range of events instead of one specific event. The analysis could also be expanded to look at other components in the region such as the utility networks, schools (since these typically serve as temporary shelters), hospitals, police stations, etc. Some of these data are available with the default installation of MAEviz and is left as an exercise to the user.
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