Evacuation path Network database for: Evacuation paths in historic city centres: a holistic methodology for assessing their seismic risk
Description
The database involves the Risk Assessment Tables concerning methods described in the manuscript entitled "Evacuation paths in historic city centres: a holistic methodology for assessing their seismic risk", in IJDRR. As reported in the manusript - Section 2.5, the Tables "are compiled for a paths sample concerning Italian historical city centres stricken by the 2016 Central Italy seismic sequence, the 2012 Emilia Romagna region (Italy) and the 2009 Aquila (Italy) earthquake. Most of the considered links are highly affected by street pavement modifications or paths blockage due to instable slopes, landslide or debris accumulations that contribute to urban scenario modifications. For each link in the sample, I_(R,j) and I_(Rn,j) values are calculated following each proposed calculation approach. The damage level of each path is evaluated by comparing photographic documentation of links before and after the earthquake event, and by adopting the description of post-earthquake damages effects according to the Road Damage Scale (RDS) [1]. RDS can varies from 0 to 5 (integer scale). The adopted damage scale for paths considers damages due to landslides, unstable slopes and cracks to street, debris presence along the street and presence of failed external elements that could impede partially or completely the path accessibility. Then, I_(Rn,j)-RDS pairs are organized to evaluate the risk index capability in describing possible critical conditions in post-earthquake scenarios. The three proposed risk assessment approaches are considered validated if a higher risk index corresponds to a higher link damage level. According to general tri-linear trends in earthquake safety and damage assessment, by including fragility curves and studies on seismic vulnerability, a linear interpolation between I_(Rn,j)-RDS pairs is then performed according to previous studies approaches [1]. Finally, a comparison of produced regression lines is provided through the evaluation of coefficient of determination R2 to define the more suitable calculation approach (based on data fitting effectiveness) among the considered ones." The database has been also uploaded as supporting file and available at: https://goo.gl/yzHNTQ (last access: 2018/04/29). References: 1-P. Anbazhagan, S. Srinivas, D. Chandran, Classification of road damage due to earthquakes, Natural Hazards. 60 (2012) 425–460. doi:10.1007/s11069-011-0025-0.