This paper presents two methods of analysis for buried pipelines subjected to seismicrnwave propagation effects, temperature load, and internal pressure. The use of closed-formrnequations for analysis of a single bend with arbitrary bend angle subjected to seismic groundrnstrain, temperature load, and internal pressure is first presented. For pipelines with complexrngeometries, such as horizontal and vertical bends, compound bends, vertical risers, tees, andrnattachments to large structures, a finite element analysis procedure is developed to predict thernseismic behavior. The three-dimensional finite element model can account for the pipe-soilrninteraction, joint slack, and other material non-linearities, such as, concrete tensile softening andrnsteel yielding. The analysis is performed for combined effects of seismic wave propagation,rntemperature load, pressure load, equipment load, and permanent ground motion. As an example,rnthe use of finite element analysis in predicting the seismic behavior of a circulating waterrnconcrete pressure pipe in a power plant is presented.
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