The impact of climate is more serious to highway bridge rubber bearings than to building rubber bearings.In order to investigate the changes of the mechanical properties of plain chloroprene rubber bearings of highway bridge in high temperature of summer,the plain chloroprene rubber bearings were processed in 20, 40, 60, 80 days by high-temperature chamber, and then the axial compression tests were carried by pressure testing machine.The impact of thermal aging in carrying capacity,ultimate compressive strength,vertical stiffness,and elastic modulus of compression was analyzed.The results showed that, under thermal aging, the plain chloroprene rubber bearings was easier to brittle failure,the elastic stage was shorten,and the phenomenon which plate exposure,cracks and layered damage was more serious.With deepening of degree in thermal aging,the carrying capacities,ultimate compressive strength,vertical stiffness,and elastic modulus of compression were decreased.The dates of compressive strength and elastic modulus of compression in 50 years were analyzed using the least square method,and the results showed that the decay function and decay curve were basically in line with variation of power function.
