The effect of P-wave propagation on the seismic behavior of steel pipelines

Abstract

Underground structures perceived as one the most vital infrastructures, which include a variety of tunnels, subway lines, gas, oil and water pipe. Plenty of studies devoted to the investigation of the effect of wave propagation method on the seismic behavior of steel pipelines. It should be mentioned that analyses have been carried out on both clayey and sandy soil with different propagation speed in each of them. The aim of this research is the investigation of the effect of longitudinal p-wave propagation method on the amount of nonlinear strains of pipeline with different way such as Pipe and Psi element or 2D modelling of soil. It became evident that the amounts of Maximum tension strain produced in the pipe have the maximum difference, equaling 3.4 per cent. In addition, it investigates the effect of frequency of input motion on nonlinear strains and the effect of frequency content in the results.