THREE DIMENSIONAL DYNAMIC ANALYSIS FOR RELATIVE DISPLACENENT BETWEEN OLD AND NEW WATER SUPPLY FACILITIES

Abstract

 In regard to the complex structure which are composed of plural structures and pipes, each structure will behave individually during large earthquakes. Consequently, it is considered that dynamic stresses and relative displacements induced by earthquake will become large at the connecting parts of structures with different dynamic characteristics. In this study, we made 3D dynamic analyses for earthquake behavior of pumping stations connected by ductile iron pipes in order to study the seismic safety of water supply facility. As a result, the relative displacement between both sides of pipe will increase according to the phase of earthquake behavior of structures and the dynamic stiffness of foundation ground.