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

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 tests of the bearing were carried out. The results show that the vertical stiffness of the bearing is significantly lower than that of the laminated steel rubber bearing, while 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 under 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 bearings. © 2022 Chinese Vibration Engineering Society. All rights reserved.