Harichandran, R. S., and Wang, W. (1990). "Effect of spatially varying
excitation on surface lifelines." Proceedings, 4th U.S. National
Conference on Earthquake Engineering, Palm Springs, California, Vol. 1,
885-894.
Abstract
The effect of spatially varying ground motion on the bending response of
surface lifelines modeled as multi-span continuous beams (e.g.,
rigid-jointed pipelines and bridges), is analyzed. The finite element
approach is used to model the lifelines and random vibration analysis is
performed. Consideration of partial correlation in the excitation
results in substantially greater stresses for stiff beams, than the
usual assumptions of simultaneous support motions or simple wave
propagation. Approximate expressions are presented to rapidly estimate
the maximum displacement and stress responses due to spatially varying
excitations.