预应力UHPC-NC组合梁截面优化设计  

Section optimization design of prestressed UHPC-NC composite beams

作　　者：朱劲松[1,2] 秦亚婷 刘周强 ZHU Jin-song;QIN Ya-ting;LIU Zhou-qiang(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure Safety,Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津大学,滨海土木工程与安全教育部重点实验室,天津300072

出　　处：《吉林大学学报（工学版）》2023年第11期3151-3159,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(52078333);天津市交通运输科技发展计划项目(2019B-21)。

摘　　要：针对预应力超高性能混凝土-普通混凝土(UHPC-NC)组合梁结构的优化设计,提出了基于改进的自适应遗传算法的结构优化设计方法。优化设计以材料成本最小化为优化目标,以组合梁截面参数作为优化设计变量,并结合承载力及变形等约束条件,建立预应力UHPC-NC组合梁的数学模型。通过优化算例表明,改进的自适应遗传算法具有较好的极值寻优能力和收敛性能。利用自适应遗传算法搜索求解预应力UHPC-NC组合梁最优设计参数,优化结果表明:优化后得到的组合梁截面参数取值合理,满足约束条件要求。A structural optimization design method based on improved adaptive genetic algorithm was proposed for the optimal design of prestressed ultrahigh performance concrete-ordinary concrete(UHPCNC)composite beams.In order to minimize the cost of prestressed UHPC-NC composite beams,a mathematical model of prestressed UHPC-NC composite beams was established by taking the sectional parameters of the composite beams as the optimization variables and combining the constraints of bearing capacity and deformation.The optimization example shows that the improved adaptive genetic algorithm has better optimization ability and convergence performance.The optimal design parameters of prestressed UHPC-NC composite beams were searched by using adaptive genetic algorithm.The optimization results show that the optimized section parameters of prestressed UHPC-NC composite beams are reasonable and meet the requirements of constraint conditions.

关 键 词：桥梁与隧道工程 超高性能混凝土组合梁 优化设计 遗传算法 预应力混凝土结构 

分 类 号：TU318.1[建筑科学—结构工程]