Abstract:
The tunnels due to their restrictions as a infrastructure work often overpass very disturbed tectonic zones. In those zones due to overthrust geological processes the rockquality are extremely poor in one side, and changes abruptly on the other side. These changes impose differential deformation on soil and tunnel linings. Especially for near faults tunnelswhere the directivity pulse and fling step phenomena plays an important role in the characterization of the seismic motion. This article gives the theoretical explanation and design consideration concerning the above mention problems. A numerical simulation whichis indented to study the behavior of the tunnel during this type of seismic events is presented.This example is taken from the design of a tunnel that shall be constructed in Albania.
