城市地下预制管廊拓扑设计综述

A Review on Topological Design for Urban Underground Prefabricated Pipe Galleries

与传统城市地下综合管廊相比,预制管廊在工厂制作和现场拼装的基础上,提高了现场作业效率,减少了施工材料运输困难。预制管廊的整体抗震性能及其管片上的应力分布已被广泛研究。考虑到成本控制,且预制管廊不同连接节点角部对应多种不同应变分布现象,可以通过拓扑优化的方式实现管廊管片材料最佳分布形式,从而优化管片应力分布,降低材料成本。关于地下管廊拓扑设计并对相应优化结果进行非线性分析的研究较为缺乏,因此,本文回顾了部分拓扑算法,并重点讨论了固体各向同性材料惩罚法(SIMP)以及双向渐进结构优化法(BESO)分别在箱式管廊与圆形管廊优化应用中的可行性。针对不同截面形状的管廊管片,需要开发相应的拓扑优化体系,并且需要注意断面更加复杂的多舱型管廊的优化迭代计算效率。针对初步优化结果进行后续详细设计和抗震性能分析,能够使优化后的城市地下预制管廊具有更好的安全性与可靠性,从而可以将其投入到实际工程项目中。

Compared with traditional urban underground comprehensive pipe galleries, prefabricated galleries enhance on-site construction efficiency and alleviate transportation difficulties through factory prefabrication and on-site assembly. The overall seismic performance of such galleries and the stress distribution within their segments has been extensively investigated. Considering cost constraints and the distinct strain distributions observed at segment joints, topology optimization can be employed to determine the optimal material layout, thereby improving stress performance and reducing material usage. However, research on the topological design of pipe-gallery segments and the nonlinear evaluation of optimization results remains limited. This paper reviews representative topology-optimization algorithms and evaluates the applicability of the SIMP method for box-type galleries and the BESO method for circular galleries. Dedicated topology-optimization frameworks must be developed to accommodate different cross-sectional geometries, and computational efficiency becomes critical for complex multi-chamber configurations. Conducting detailed design and seismic-performance assessments based on preliminary optimization results enhances the safety and reliability of prefabricated pipe galleries, thereby supporting their application in real engineering projects