考虑半刚性连接的输电塔结构离散优化设计方法

输电塔半刚性节点会对结构内力及变形产生不可忽视的影响，然而，在传统的输电塔结构优化设计中，输电塔节点的半刚性连接往往被简化为铰接。为了准确评估输电塔的实际响应并对输电塔进行合理优化设计，以考虑半刚性连接的输电塔为研究对象，通过使用弹簧单元模拟半刚性节点的弯矩-转角关系，建立了半刚性连接的输电塔有限元模型，并提出了半刚性连接输电塔的优化数学模型和优化设计方案，发展了一种考虑半刚性连接的输电塔结构离散优化设计方法。优化结果表明：文中方法能够在满足结构应力及变形约束的条件下有效降低输电塔钢材的消耗量，节约了工程造价成本，具有良好的经济效益。

Discrete optimization design method of transmission tower with semi-rigid connection

Semi-rigid joints have a significant influence on the internal forces and deformations of transmission towers. However, in traditional transmission tower structure optimization, semi-rigid joints are often oversimplified as hinge joints. To accurately evaluate the true response of transmission towers and rationally optimize their structures, this study focuses on transmission towers with semi-rigid connections. A finite element model for such towers is established using spring elements to simulate the moment-rotation relationship of semi-rigid joints. Furthermore, an optimization mathematical model and design scheme for transmission towers with semi-rigid connection are proposed, resulting in the development of a discrete optimization method for these structures. The optimization results show that the proposed method effectively reduces the consumption of steel in transmission towers while satisfying structural stress and deformation constraints, leading to cost savings and favorable economic benefits in engineering projects.