Seismic analysis of the structure of an underground railway station including SSI

Student: Federico Fele
Supervisor: Prof. E. Faccioli

Abstract

This work aims to investigate the main issues of the seismic design process of the structure of an underground railway station in Florence. It consists of three main parts: definition of seismic context, evaluation of ground response, assessment of structure behaviour.

It is interesting to point out that underground structures have peculiar features (enclosure on/in soil and dimensions) which make their seismic design quite different from the design of "surface structures". Most notably, the seismic response is governed by the ground displacements.

The historical approach of design assumes that the soil-structure interaction is negligible or the kinematic interaction between soil and structure is taken into account in a simplified way.

In this work, the direct interaction method is used to take into account the SSI by means of nonlinear 2-D analyses. The results are compared with those obtained from simplified approaches.

You may download a digital version of this MSc dissertation here.