Abstract
High damping rubber bearings (HDRB) is a useful seismic resistant device that is widely used in buildings due to many outstanding advantages. However, the mechanical characteristics of HDRB are complicated such as temperature-dependent, rate-dependent. This paper is devoted to investigate the low temperature dependence of HDRB’s mechanical behavior. For this purpose, the experiments on HDRB conducted at −30 °C, −10 °C, and 23 °C is to investigate the low temperature dependence of mechanical behavior of HDRB. A numerical calculation to determine the viscosity of HDRB was conducted to investigate the low temperature dependence of HDRB’s viscosity. Experimental results show that a significant increase in the rate-dependent overstress at low temperatures. This behavior can be ascribed to the temperature dependence of HDRB’s viscosity. It means that the viscosity effect of the material increases when temperature decreases. In addition, the experimental observations indicate that the rate sensitivity of HDRB depends on the low temperatures. On the contrary, the dependence of the rate-independent equilibrium stress at the end of the relaxation process is quite weaker. Furthermore, the results of the numerical calculation to identify the viscosity of HDRB also agree with the conclusions obtained from the experimental observations.
Published Version
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