近断层地震动作用下摩擦摆惯容隔震结构的地震响应分析

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中图分类号：TU352 文献标志码：A 文章编号：1000-0844（2025）06—1326—10

Abstract： To prevent excessive displacement of friction pendulum isolators under pulse-type ground motions and further reduce structural seismic responses，an inerter system is integrated with friction pendulum isolators to formulate the nonlinear equations of motion for friction pendulum inerter-isolated structures. Using MATLAB，the seismic response of a single-degreeof-freedom structure under near-fault earthquakes is computed. The maximum displacement of the isolation layer of the friction pendulum inerter-isolated system is compared to the maximum absolute acceleration of the superstructure to investigate its isolation performance. Results demonstrate that the series-parallel type I and type II friction pendulum inerter-isolated systems can effectively mitigate dynamic responses under near-fault ground motions and provide superior isolation under ground motions with rupture forward directivity effects.Larger equivalent damping ratios yield more notable vibration reduction. For equal damping ratios，the series-paralel type Iinerter system exhibits fuller hysteresis loops and more effectively constrains isolation layer displacement exceedance，demonstrating enhanced isolation efficacy.

Keywords： near-fault ground motions; friction pendulum bearing; maximum displacement of iso lation bearing； superstructure acceleration;inerter system

0 引言

摩擦摆支座是由Zayas等[1-2]在传统平面滑移系统基础上提出的隔震装置，其不仅具备平面滑移隔震装置对地震激励频率敏感性低、稳定性高等特性[3-5]，独特的圆弧滑动面设计还赋予其自复位功能。（剩余12372字）