Analysis Of Earthquake Resistance Of Buried Pipeline Under Site-fluid Interaction

The buried conduitpepeline's damage under dynamic loading is analyzed through numericalsimulation method on the basis of Automatic Dynamic Incremental Nonlinear Analysis(ADINA). The dissertation analyzes the controlling factors of the damage of buried conduitpepeline, and considers the destructive condition under the combined action of complex site condition, faultage and liquid.A calculation model the buried conduitpepeline that crosses different faultage is set up by using ADINA. Applying the two methods of ADINA that one is Native, the other is Parasolid to set up a finite Element Model, and with the help of Boolean Operators realize geometric integration between conduitpepeline and ground. When setting up the conduitpepeline model, Native is adopted, while for the ground model, Parasolid is applied. Based on the setting of rubbing contact realize the interaction between conduitpepeline and the sourrounding ground, and utilize the displacement loading to simulate the relative motion between the faultage. Set up three corssing faultage models, and then find that with the same loading the destructive degree of the conduitpepeline that crosses the large faultage is much worse than the conduitpepeline that just crosses the middle or small faultage.Meanwhile, by considering the interaction between the conduitpepeline, the ground on the site condition (crossing the faultage), the Coupling Effect of flowing solid on fluid condition, medium of liquid, flowing speed, wall thickness of the conduitpepeline, site ground as well as the comparation between two crossing faultage models, it can be concluded that the transporting medium inside the conduitpepeline shows great influence on the damage of conduitpepeline and the form, speed, etc. of the medium inside the conduitpepeline affect the distortion of conduitpepeline and the stress distribution. The wall thickness, site ground also affect the conduitpepeline's stress and distortion, so the Coupling Effect of inside liquid and conduitpepeline is also very important for analysing the damage of buried conduitpepeline. The larger of density of inside transporting medium, the faster of transporting speed and the thinner of wall thickness, the buried conduitpepeline is more easily wrecked. Consequently, when designing the buried conduitpepeline, the density and speed of inside medium as well as the wall thickness should be considered sufficiently.