Experimental Test of Elastomeric Bearings Used in Base Isolation
Tomme: LXI (LXV) Fascicle: 2 | 2015
Pages: 9-18
Abstract text:
The performance of bearings used in base isolation depends on the material of which they are composed, the mechanical characteristics and the stability of the bearing. This paper presents an experimental test to determine the shear modulus of elastomeric bearings. The experimental test was carried out on different types of elastomeric bearings, namely: simple elastomeric bearing (EB), lead elastomeric bearing (LB), elastomeric bearing with sand core (SB) and elastomeric bearing with iron filings core (IB). The elastomeric bearings have been provided by the firm S.C. FREYROM S.A. The elastomer had a hardness of 60 Sh A. Following experimental tests, the highest values of vertical and horizontal stiffness were obtained in the case of elastomeric bearing with sand core and the lowest were achieved in the case of elastomeric bearing with iron filings core.
Key Words:
elastomer; elastic modulus; horizontal stiffness, vertical stiffness, hysteresis.
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