Restrainer-type sliding bearing (RTSB) is a practical seismic isolation system for reducing the excessive displacement of flat sliding bearings under strong earthquakes to ensure the seismic safety of highway bridges. Due to the good corrosion resistance and considerable energy dissipation capability, SMA cables can be used in the RTSB to form the SMA-restrained RTSB to improve its performance. To realize the reliable seismic design of the SMA-restrained RTSB, this paper adopted the seismic resilience-based evaluation method to give the optimum design to minimize the seismic resilience of the bridge system. Firstly, a new index of seismic resilience was defined in the proposed resilience-based methodology to account for the variability of ground intensities. The quantile regression was also proposed to improve the estimation of seismic demand dispersions for seismic fragility analysis. The seismic performance of highway bridges isolated with the SMA-restrained RTSB was compared with different sliding bearings to investigate the effect of slack cables on the seismic performance of the SMA-restrained RTSB. Finally, an extensive parametric study was conducted based on a Gaussian Process Regression (GPR) model together with the uniform design method to investigate the sensitivity of different bearing parameters. The optimal design of the SMA-restrained RTSB bearing was then obtained based on the GPR model and genetic method. It is concluded that the mechanical properties of SMA-restrained RTSB have a significant effect on the seismic resilience of highway bridges. The proposed seismic resilience-based methodology can be adopted to obtain the optimal designs of the SMA-restrained sliding bearings given the target resilience of highway bridges.

限位式滑动支座（RTSB）是一种实用的隔震系统，用于减少强震下平面滑动支座的过度位移，以确保公路桥梁的抗震安全。由于具有良好的耐腐蚀性和相当大的能量耗散能力，SMA 电缆可用于 RTSB 中，形成 SMA 约束型 RTSB，以提高其性能。为实现SMA约束RTSB的可靠抗震设计，本文采用基于抗震回弹的评估方法，给出优化设计以最小化桥梁系统的抗震回弹。首先，在提出的基于弹性的方法中定义了一个新的地震弹性指数，以解释地面强度的可变性。还提出了分位数回归以改进对地震脆性分析的地震需求离散度的估计。将采用SMA约束RTSB隔离的公路桥梁的抗震性能与不同滑动支座进行比较，以研究松弛索对SMA约束RTSB抗震性能的影响。最后，基于高斯过程回归 (GPR) 模型和统一设计方法进行了广泛的参数研究，以研究不同轴承参数的敏感性。然后基于GPR模型和遗传方法获得SMA约束RTSB轴承的优化设计。结论是SMA约束RTSB的力学性能对公路桥梁的抗震弹性有显着影响。