摘要相较于传统设计分析方法，CAE(Computer Aided Engineering)技术有着极大的优势。其可以弥补设计人员由于经验和时间的限制，得出相对比较优化的设计结果。CAE技术相关的理论研究已经取得了很大进展，但其在工程中的应用却处于起步阶段。因此，本文针对框架结构的优化设计有一定的现实意义。本论文，首先开展了钢框架结构的设计。在参照相关案例及相应的工程规范，对工程进行了建筑设计、结构设计，并完成了主要构件在各种荷载作用下的验算。最终，确定了满足使用和安全要求的结构形式。其次是利用已有的设计资料，基于ANSYS对主梁及柱进行了尺寸优化。优化过程中选取梁柱的截面高度为参数，以构件内力小于截面极限荷载以及层间位移角为限制条件，以体积最小为优化目标，进行优化循环，优选出较优的构件尺寸。就其中，二维平面框架结构优化而言，经过40次优化迭代，第36次优化结果最优解，单榀框架体积从2。6639m3变为2。2646m3，以11榀框架计入，可节省用钢34。1吨，初始用钢量减少8。72%。就空间三维框架结构优化而言，经40次优化迭代，第28次优化结果最优，结构体积从初始的637。83m3变为632。69m3，相比初始可节省用钢40。35吨，初始用钢量可减少10。19%。三维优化，由于空间整体效应，相比二维优化具有一定的优势。87378

毕业论文关键词：钢结构；多层框架；结构设计；结构优化；

Abstract Compared to the traditional design analysis, CAE (Computer Aided Engineering) technology has a great advantage。 It can make up for designers’ limitations of time and experience and obtain relatively optimized design results。 Theoretical studies related CAE technology has a great progress, but it’s application in engineering was in the infancy。 Therefore, this article has a significance for the optimization design of frame structure。 In this thesis, first part is steel frame structure design。 In reference to the relevant case and corresponding engineering specifications of the project, the progress is including architectural design, structural design, and completed checking the main components in a variety of loads。 In the end, we get the structuremeet of meeting using and the safety requirements。 Followed by using the existing data of the design, the size optimization of the main beam and column is based on ANSYS。 In the process of the Optimization, the cross-sectional height of the beams and thecolumns is selected as the parameters to making member forces less than the ultimate load and selecting the inter-sectional layer displacement angle as the restrictions, aimed to geting minimum volume as the optimization objective。During the optimize cycle, we select a member of preferably the optimum size。 On which the two-dimensional frame structure optimization, the optimization iteration through 40th, 36th optimal results the optimal solution, the volume of a single frame from 2。6639m3 becomes 2。2646m3, counting the number of the frame as 11, it can save 34。1 tons of steel and the initial consumption of steel decreased by 8。72%。 In three-dimensional space frame structure optimization purposes, during the 40 iteration of the optimization, 28th is the best optimization results, the volume changes from the initial 637。83m3 to 632。69m3, compared to an initial savings of 40。35 tons of steeland the initial consumption of steel decreased by 10。19%。 Three-dimensional optimization, due to the overall effect of space, compared to the two-dimensional optimization, is more  advantageous。

Keywords: Steel structure; Multi-layered framework;Structural design;Structural optimization;

目 录

第1章 建筑方案和结构方案 1

1。1 建筑方案