1. PGA, RMR, maximum overburden depth, and critical shapes are shown in rows 5,6 & 7 of Table 8. These classes are Shaking Induced Damage classes. No damage cases of invert are present in the L and VL classes. Thus, if the tunnel SSD is at >30 km and if PGA is <0.4g the damage to the invert may not take place. The LO class is to show the no-damage scenario of a tunnel. Further for the damage class of;L);Rows 5,6, &7 of Table 8 For these classes, the ranges of SSD
2. Summary of the Abrahamson & Silva NGA ground-motion relations;N Abrahamson;Earthquake Spectra,2008
3. Empirical ground-motion models for point-and extendedsource crustal earthquake scenarios in Europe and the Middle East;S Akkar;Bulletin of earthquake engineering,2014