抄録
Since the Hanshin-Awaji Earthquake Disaster, assuming the safe horizontal force during an earthquake has increased when designing bridges. When using metal bearings on a bridge, it has become difficult to design fixed bearings that corresponds to intensive horizontal force. Therefore, dispersing rubber bearing is commonly used these days. Railway bridges must maintain train's running quality, so we must consider the vertical displacement on the rail when designing the rubber bearing. It is essential to understand the influence of the rubber bearing's compression stiffness on the train's running quality. In this paper, we will examine the current formula's suitability of the constant compression stiffness and understand the basic quality of the compression stiffness so we can offer an accurate calculation formula.
