摩擦-弹簧水平隔震系统的模型与设计

摘要

为解决空间网格结构三维复合隔震的水平隔震问题，提出了一种摩擦一弹簧水平隔震装置．新开发的水平隔震系统依靠摩擦滑移隔震，由并联弹簧实现震后复位．针对隔震与复位，建立了装置的力学模型，通过目标隔震周期导出了摩擦系数与滑移幅值间的关系式，并依据滑移幅值确定了复位弹簧的刚度计算方法．同时依据力学模型，给出了水平隔震装置的设计方法．%A new type of control device, which is fit for the horizontal seismic isolation of a bearing involved three-dimensional seismic isolation for spatial latticed structures, is introduced in the paper. The device is combined frictional sliding system with helical springs. The horizontal seismic isolation of the device mainly depends on frictional sliding system, and its restoring force comes from the incorporated helical springs. Based on the device, the mathematical model of the system was developed, and the relationship between sliding coefficient and amplitude of the sliding displacement were established. Meanwhile, the formula for stiffness calculating of the springs was derived. In addition, the design method for the system was advised.