Underground polymeric l-shaped pipeline vibrations under seismic effect

Abstract

The simultaneous equations of longitudinal and transverse vibrations of an underground polymeric L-shaped pipeline under the arbitrary direction of seismic load were derived in the paper. A computational scheme of the problem was constructed using central finite-difference relations. The analysis of the results obtained on the simultaneous longitudinal and transverse vibrations of underground polymeric L-shaped pipelines under seismic loading was conducted. The stress-strain state of the L-shaped polymeric pipeline subjected to seismic effect was determined, and the axial forces and bending moments arising in curved pipelines during an earthquake were determined.

The effect of a seismic wave on a two-span beam on rigid supports interacting with the ground

“…Academician T. Rashidov developed a dynamic theory of seismic resistance of complex systems of underground structures, which is based on taking into account the difference in the deformations of the structure and the soil. On the problems of seismic resistance of underground and surface structures interacting with the surrounding soil in our country and abroad, a number of scientists worked [6][7][8][9][10].…”