Transverse dynamic characteristics and seismic responses of large-scale tall-pier aqueduct

摘要

In this paper,the tall-pier aqueduct is simplified as a coupled system of tall pier and rectangular tank.The motin equations of the coupled system are derived by linear potential-flow theory of fluid and Hamilton's principle.Analyticla methods are applied to analyze the transverse dynamic characteristics and earthquake responses of the coupled system.the results show that:(1) The modes of the coupled system can be divided into two classes.One sort is defined as "fluid-oscillation-mode" which exhibits slosh of fluid,and the other defined as "structure-oscillation-mode" which represents natural motion of the structure.(2)A great dynamic moment my be produced at pier bottom by seismic action.