To study the shear performance of a kind of metal rubber bearing, the influences of vertical pressure and horizontal shear deformation on the shear performance of metal rubber bearing were analyzed by quasi-static tests under three kinds of compressive stress. Through the analysis of test data, the empirical formula of the correlation between the bearing shear performance and the compressive stress was established, and a trilinear restoring force model which can approximately simulate the test curve was proposed. The results showed that with the increase of bearing shear deformation, the equivalent stiffness and energy consumption of the bearing increase and the equivalent damping ratio decreases, while the yield force basically remains unchanged, and the hysteretic curve gradually changes from shuttle shape to anti-S shape. When the shear strain is greater than 25%, the stiffness hardening phenomenon appears. With the increase of compressive stress, the energy consumption, yield force, equivalent stiffness and equivalent damping ratio of the bearing increase.
杜骞,夏修身.金属橡胶支座剪切性能试验研究[J].地震工程学报,2021,43(5):1176-1182,1196. DU Qian, XIA Xiushen. Experimental study on shear behavior of metal rubber bearings[J]. China Earthquake Engineering Journal,2021,43(5):1176-1182,1196.复制