Cyclic loading experiments on Lead Rubber Bearing (LRB) with large diameter lead plug were performed. Four-size LRB specimens which had almost identical shape factors were used. Effects of temperature and scale on LRB properties were examined based on one-direction loading tests. In addition, behavior under two-direction loading was compared with one under one-direction loading. The relationship between temperature and yield stress of lead plug was derived from temperature measured by using thermocouples installed in the center of lead plug. Heat conduction analysis using the relationship can predict force and temperature of lead plug with high accuracy.
