Abstract
The seismic behaviors of the deformed pipelines are not clear. The effectiveness of the flexible and nondetached mechanical joint is not examined enough. Moreover, the influence of the joint characteristics on the bending moment, stress, strain of pipelines, etc. has not been clarified. Numerical response analyses were carried out for buried pipelines with typical joint characteristics and soil frictions subjected to seismic waves by using ERUAL program. As a result, it was found that the stress concentrations occur near bend pipe section or branched pipe section as the bending moment and the rotation are predominant, and the effectiveness of the flexible and non-detached mechanical joint (S-MD joint) was verified.
