DESIGN OF UNDER-TRACK CONSTRUCTION IN SEISMIC AREAS: INSTRUCTIONS AND COMMENT

In connection with recent seismic events the FS has found it necessary to adapt the design of railway bridges to the findings of the studies, which are becoming increasingly perfected, on the schematization of earthquakes and on the relative effects on the structures. In this connection, Law No. 64 concerning the "provisions for constructions with particular regulations for seismic areas", provided the general critera for the design, execution and testing of structures in seismic areas. The Permanent Way Department has issued appropriate "Technical Instructions" after prior approval of the 1st Section of the Higher Council of Public Works. These instructions are quoted in full and commented point by point, amplifying and giving examples of the content, at the same time clarifying the philosophy lying behind each individual instructions in such a way as to provide the designers and the users with the fullest possible elements in his field.