Affiliation:
1. Faculty of Engineering, Graduate School, University of Yamanashi, Japan.
2. Tokyo institute of Technology, Tokyo, Japan
Abstract
<p>This paper investigates temperature-dependent behavior of a natural rubber, which has been employed for bearings of base-isolation. At first, we develop a temperature-bath for our multi-axial loading machine to keep surface temperature of rubber specimens constant. Then, we conduct a series of bi-directional simple shear tests on cylindrical specimens at different temperature levels (- 15, 0, 20, 40, 60 [°C]), various strain amplitudes and strain rates. The experimental results show that stiffness and hysteretic area are gradually reduced with increase of the temperature. This fact indicates that variation of temperature gives effective change to behavior of the rubbers. In the future, we are going to construct a constitutive model of the rubber, based on the stress-strain relations obtained in the experiment.</p>
Publisher
International Association for Bridge and Structural Engineering (IABSE)