Abstract
Siphon pipe is a crucial structure as a part of trunk line for water supply. Since the channel slope is high, the seismic evaluation for the direction of crossing as well as for the direction of running is necessary. However, most of the existing siphon pipes were constructed before establishing of calculation method of seismic design. The studies on seismic performance of siphon pipe have been done few. In this study, the check method of seismic performance for siphon pipe was set and the problems on seismic performance was made clear based on this check method throughout the parametric studies of dynamic analysis. In addition, the priority index on selecting the siphon among several ones was proposed as the first stage of the seismic performance check. As the results, the check to the bending moment is considered as an indicator of determining the priority on seismic evaluation. It was shown that the channel slopes strongly affected seismic performance in the direction of running.
