为了准确、高效地评估输电塔半刚性节点的力学特性，提出了一种基于代理模型的输电塔半刚性节点弯矩-转角曲线预测方法，通过引入代理模型方法近似半刚性节点几何尺寸与极限抗弯承载力、初始转动刚度之间的函数关系，建立具有较高精度的预测模型，进而结合Kish-Chen幂函数模型拟合输电塔半刚性节点的弯矩-转角曲线。结果表明，提出的基于代理模型的输电塔半刚性节点弯矩-转角曲线预测方法能减少实验和数值模拟的成本，较好地模拟输电塔半刚性节点实际受力-变形情况，为输电塔半刚性节点的工程设计和理论研究提供了参考。

In order to accurately and efficiently evaluate the mechanical properties of semi-rigid joints in transmission towers, a method based on surrogate model is proposed to predict the moment-rotation relationship of the semi-rigid joints. By introducing the surrogate model method to approximate the functional relationship between the geometric dimensions, ultimate flexural capacity, and initial rotational stiffness of semi-rigid joints, a prediction model with high accuracy is established. Furthermore, the moment-rotation curves of semi-rigid joints in transmission towers are fitted using the Kish-Chen power function model. The results show that the proposed surrogate model-based prediction method for moment-rotation curves of semi-rigid joints can reduce the cost of experiments and numerical simulations, while accruately approximating the actual force-deformation relationship of semi-rigid joints in transmission towers. This method also provides valuable insights for the engineering design and theoretical research of semi-rigid joints in transmission towers.

TM754

国家自然科学基金国际(地区)合作与交流项目(51611140123)；国家重点研发计划项目(2017YFC0703901, 2018YFC0809406)；重庆市博士后研究项目特别资助(2022CQBSHBT3009)。