摘要
双层交通混凝土箱梁是由钢筋和混凝土两种材料组成,而它们的工作性质可抽象为由钢筋和混凝土构成的拉杆-压杆模型。引入一种新的拓扑优化方法"加窗渐进结构优化算法"建立反映结构工作机理的拉杆-压杆模型,为双层交通混凝土箱梁腹板开孔设计提供理论指导。介绍了拓扑最优解建立拉杆-压杆模型和如何完成结构配筋设计方法。结果表明:通过加窗渐进结构优化算法获得的拓扑最优解能较好的呈现结构内部受力状态;根据优化方法完成的工字梁结构配筋及开孔设计与试验设计相比,开孔率增加了5.5倍,极限荷载增长了1.2倍,但钢筋用量减少了30%。
The double-deck concrete box girder is composed of two kinds of material,steel and concrete,and their working properties can be represented by a tie rod-compression rod model composed of steel and concrete.A new topology optimization method called"windowed progressive structure optimization algorithm"is introduced to establish the tie rod-compression rod model reflecting the working mechanism of the structure,which provides theoretical guidance for simplifying the opening design of the double-layer concrete box girder web.This paper introduces the optimal topology solution to establish the tie rod-compression rod model and how to complete the structural reinforcement design.The result shows that the topological optimal solution obtained by the windowed progressive structure optimization algorithm can better represent the internal stress state of the structure;and by the optimization method,the opening ratio of I-beam structure is increased by 5.5 times compared with the experimental design,the ultimate load is increased by 1.2 times,but the amount of steel is reduced by 30%.
作者
王磊佳
祝明桥
胡秀兰
唐明杰
WANG Lei-jia;ZHU Ming-qiao;HU Xiu-lan;TANG Ming-jie(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan,Hu'nan 411201,China)
出处
《工程力学》
EI
CSCD
北大核心
2020年第S01期282-286,共5页
Engineering Mechanics
基金
国家自然科学基金项目(51378202,51578236)。
关键词
结构工程
拓扑优化
加窗
工字型梁
腹板开孔
抗弯
structural engineering
topology optimization
added window
I-beam
web opening
bending resistance