SEISMIC RESPONSE ANALYSIS OF UNDERGROUND PIPELINESUSING EFFECTIVE STRESS METHOD

摘要

Seismic response of underground pipeline is correlative closely with the characters of surrounding soiland soil-pipe mutual contact interface. Based on the principles of effective stress method and the nonlinearsoil mode, the development of pore water pressure, the reduction of soil effective stress and thechange of soil dynamic properties can be considered simultaneously. The contact interface elementbetween soil and pipeline is adopted to simulate interactive response. With the finite element method,Seismic response of underground pipelines can be numerically simulated. The effects of some factors onthe response are also studied.