In this study, to satisfy the base isolation demand of large-scale building structures under different earthquake records, a new bidirectional variable curvature friction pendulum bearing (BD-VCFPB) is proposed. The VCFPB is designed in detail based on the basic principle of a friction pendulum system. Moreover, the sliding interface function, gap between the slider and the sliding interface, and polytetrafluoroethylene (PTFE) plate stress are studied. Finally, a dynamic cyclic test is conducted to study the influence of the slider size, contact pressure on the PTFE plate, and loading frequency on the hysteretic behavior of the VCFPB. The results indicate that the hysteretic curves of the horizontal force and the displacement are regular, symmetrical, stable, and full, and clearly reflect the variable curvature convex and concave characteristics and the excellent behavior of energy dissipation of the BD-VCFPB. The sliding friction coefficient varies significantly with the contact pressure on the PTFE plate and the loading frequency; however, it has little relation with the slider size. A hysteretic model is proposed based on the results of a unidirectional test, and it is in good agreement with the hysteretic curves of the horizontal force and the displacement from a bidirectional test.

为了满足不同地震记录下大型建筑结构的基础隔震要求，提出了一种新型的双向变曲率摩擦摆轴承（BD-VCFPB）。VCFPB是根据摩擦摆系统的基本原理进行详细设计的。此外，还研究了滑动界面功能，滑块与滑动界面之间的间隙以及聚四氟乙烯（PTFE）板应力。最后，进行了动态循环测试，以研究滑块尺寸，PTFE板上的接触压力以及加载频率对VCFPB滞后行为的影响。结果表明，水平力和位移的滞后曲线是规则的，对称的，稳定的和完整的，并清楚地反映出BD-VCFPB的可变曲率凹凸特性和出色的能量耗散性能。滑动摩擦系数随PTFE板上的接触压力和加载频率而显着变化。但是，它与滑块大小关系不大。根据单向试验的结果，提出了一种滞回模型，该模型与水平力和双向试验的位移的滞回曲线非常吻合。