基于改进多目标布谷鸟算法的拦沙重力坝结构抗震优化  

Seismic performance optimization of sand retaining gravity dam based on improved multi-objective cuckoo search algorithm

作　　者：于家傲 沈振中[1,2,3] 李乐晨 孙一清 疏永康 于世发 YU Jiaao;SHEN Zhenzhong;LI Lechen;SUN Yiqing;SHU Yongkang;YU Shifa(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210024,China;Key Laboratory of Transport Industry of Comprehensive Transportation Theory(Nanjing Modern Multimodal Transportation Laboratory),Ministry of Transport,Nanjing 211100,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210024,China;School of Transportation,Southeast University,Nanjing 211189,China;Qingdao Runtianfeng Construction and Development Co.,Ltd.,Qingdao 266109,China)

机构地区：[1]河海大学水利水电学院,江苏南京210024 [2]交通运输部综合交通运输理论交通运输行业重点实验室(南京现代综合交通实验室),江苏南京211100 [3]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210024 [4]东南大学交通学院,江苏南京211189 [5]青岛润天丰建设发展有限公司,山东青岛266109

出　　处：《水资源与水工程学报》2024年第5期137-147,共11页Journal of Water Resources and Water Engineering

基　　金：综合交通实验室开放基金课题(MTF2023010);江苏高校优势学科建设工程项目(水利工程)(YS11001)。

摘　　要：混凝土重力坝在强震作用下易出现结构安全问题,因而需采用合理经济的工程措施加以防护。将西北地区某拦沙重力坝作为研究对象,基于振型分解反应谱法分析大坝自振特性与动力响应,并综合考虑坝踵拉应力和抗震措施可变造价,采用改进多目标布谷鸟算法(MOCS)进行抗震设计方案的优化。此外,为提高算法性能,通过调整拥挤度距离计算公式、引进多项式变异算子以及动态步长和发现概率等方式进行改进。通过与其他多目标算法在不同测试函数上的对比试验,证明改进MOCS算法具备计算高效和解集均匀等优点。最后,根据Pareto最优解集,对重力坝的设计方案进行合理性评价,并提出工程建议。相关方法与结论对高烈度地震区混凝土重力坝的结构设计具有参考价值。Concrete gravity dams are prone to structural safety issues under strong earthquakes,therefore reasonable and economic engineering measures are needed for the protection.A sand retaining gravity dam in northwest China was taken as the research object,and its natural vibration characteristics and dynamic response were analyzed based on the mode-superposition response spectrum method.Taking the tensile stress on the dam heel and the variable cost of seismic measures into account,this study employed the improved multi-objective cuckoo search(MOCS)algorithm for the optimization of anti-seismic design.In order to improve the performance of the algorithm,improvements were made by adjusting the crowding distance calculation formula,introducing polynomial mutation operators,dynamic step size and discovery probability.Through comparative experiments with other multi-objective algorithms on different test functions,it has been proven that the improved MOCS algorithm has the advantages of high computational efficiency and uniform set resolution.Finally,based on the Pareto optimal solution set,the rationality of the design scheme for gravity dams was evaluated,and corresponding engineering suggestions were proposed.This study can provide some valuable insights for the structural design of concrete gravity dams in high-intensity earthquake areas.

关 键 词：拦沙重力坝 改进MOCS算法 振型分解反应谱法 地震响应 结构优化 

分 类 号：TV642[水利工程—水利水电工程] TV312