Experimental study on shear and damping properties of rubber materials for seismic isolation device
DOI:
https://doi.org/10.21754/tecnia.v35i2.2504Palabras clave:
Elastomeric isolator, Shear properties, Neoprene, Natural rubber, Recycled rubberResumen
In recent decades, seismic elastomeric isolation systems have become an effective solution to mitigate seismic hazard in civil structures. The elastomeric component resists shear forces at the base of the superstructure by decoupling it from ground motion during an earthquake. Thus, the shear modulus is a critical parameter for ensuring the seismic performance of the isolation system. This research presents an experimental study of shear properties of three types of rubber: natural rubber, recycled rubber, and neoprene to determine their feasibility as elastomeric materials in seismic isolation systems. To achieve this, nine tests (three for each type of rubber) were carried out following the ASTM D4014 standard to estimate their shear modulus at twenty-five percent shear strain. Moreover, the deterioration and hardening of each rubber material were investigated under large deformation cycles. Consequently, a correlation equation between strain and shear modulus for each rubber material was proposed. The results showed neoprene shear modulus exhibit better performance compared to natural and recycled rubber.
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