曲面摩擦滑移隔震结构 (curved surface sliding isolated structure, CSSIS) 是一种具有广泛应用潜力的新技术. 但在工程实践中, 地震波的选取会显著影响 CSSIS 的抗震设计和风险评估结果. 针对缺乏强震记录的情况, 提出一个能够反映特定地区地震特征的随机地震动模型, 并通过Monte-Carlo 模拟算法, 评估CSSIS 的抗震可靠指标. 通过振动台试验和理论分析确定 CSSIS 力学模型的关键结构参数, 采用随机地震动模型生成地震波, 以天津宁河地区为例, 基于首次超越概率理论, 计算了 CSSIS 的失稳概率 Pf . 结果表明, 地震震级 M 和震中距 D 对 CSSIS 的抗震性能具有显著影响. 随着震中距 D 的增加, 上部结构的失稳概率 Pf 迅速下降; 相反, 地震震级 M 的增加会导致 Pf 升高. 所得研究结果将为 CSSIS 的广泛应用提供重要的设计参考依据.

Curved surface sliding isolated structures (CSSIS) is a new technology with wide application potentials. However, in engineering practice, the selection of seismic waves controls the seismic design and risk assessment of the CSSIS. A stochastic ground motion model that reflects specific earthquake characteristics was proposed, and the seismic reliability of the CSSIS was evaluated via Monte Carlo simulation (MCS). A mechanical model of the CSSIS was established, and the key structural parameters were determined via shaking-table tests and theoretical analysis. A random ground motion was generated using a stochastic method. Considering the Ninghe area in Tianjin as an example, the failure probability Pf of the CSSIS subjected to the first excursion criterion was calculated. The results show that earthquake magnitude M and source-to-site distance D significantly influence the seismic reliability of the CSSIS. As D increases, Pf of the superstructure decreases rapidly. Conversely, an increase in the earthquake magnitude M leads to an increase in Pf . The research results will provide an important design reference for the wide spread application of CSSIS.