On the dynamic response of buried orthotropic cylindrical shells

Abstract

This paper deals with the dynamic response of an orthotopic cylindrical shell, a pipe, buried underground and subjected to seismic excitation. A thick-shell model of the pipe including shear deformation and rotatory inertia has been used. The shell is assumed to be perfectly bonded to the surrounding medium (soil), of infinite extent. Only the axisym-metric response due to an incident compressional wave has been investigated. Effects of the shell orthotropy on its response characteristics have been illustrated by changing the non-dimensional orthotropy parameters of the shell over a wide range. Results have been obtained for different soil conditions—hard (rocky), medium and soft. It is found that the orthotropy parameters do not influence the shell response equally. Even the degree of their influence is found to be highly dependent on the rigidity of the surrounding soil. © 1987, Academic Press Inc. (London) Limited. All rights reserved.