Experimental analysis on the compression and compressive shear performances of a nylon fabric laminated rubber bearing

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (18) : 150-156.

WU Yifeng1,ZHANG Yan1,LI Aiqun1,2,XU Hong1

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Abstract

In order to further popularize the application of seismic isolation technology in rural buildings, a low-cost nylon fabric laminated rubber bearing was designed and produced, and the vertical compression and the compression shear test of the bearing were carried out. Results show that the vertical stiffness of the bearing is significantly lower than that of the laminated steel rubber bearing, but its vertical compression damping ratio can reach 7%;the compression-shear hysteresis curve of the bearing is full and the residual displacement is small; when the shear strain is small, the equivalent horizontal stiffness of the bearing decreases due to "rollover" deformation, but at high shear strain, the tangential stiffness of the bearing significantly increases due to the hardening of the natural rubber material and the "full rollover" deformation of the bearing; the performance of the bearing is not significantly degraded when the shear strain is 300%, but small cracks are found on the side of the bearing; as the shear strain increases, the equivalent damping ratio of the bearing first decreases and then increases in the range of 9%-13%. The above results can provide references for further research and engineering applications of this type of bearing.
Keywords: nylon fabric laminated rubber bearing; vertical compression test; compression shear test; hysteresis curve; damping ratio

Key words

nylon fabric laminated rubber bearing / vertical compression test / compression shear test / hysteresis curve / damping ratio

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WU Yifeng1,ZHANG Yan1,LI Aiqun1,2,XU Hong1. Experimental analysis on the compression and compressive shear performances of a nylon fabric laminated rubber bearing[J]. Journal of Vibration and Shock, 2022, 41(18): 150-156

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