Analysis of doule-direction earthquake rubber support base earthquaking process;

Started from problems in summarizing bridge surface shrinking cracks,it analyzes and elaborates the key skilled problems of multi-hole bridge such as top force analysis,bottem structural block and soft supporting s combination as well as kinds of rubber supporting and rational usage.

Effective factors on properties of laminated rubber bearing;

Key points for installation quality control of bridge rubber bearings;

Application of shock insulation technique of laminated rubber bearing;

The experiments show that the hysteresis property of lead plug rubber bearings(LRB) is closely related to load time,which is not considered in the existing mechanics model of LRB.

In order to grasp the tension properties of rubber bearings,and to establish the mechanics model and value criterion,the new computation models of bi-stiffness stress-strain and origin tension stiffness stress-strain are proposed,based on tension stress-strain curve of rubber bearings,and the hysteretic model is put forward too for analyzing the tensile properties.