学位論文

構造最適化を用いた超高層制振構造の耐震設計に関する研究

Seismic design for damping system skyscrapers using structural optimization

jpn

https://doi.org/10.15002/00030514

1

310

2024-03-24

Not Applicable (or Unknown)

32675甲第606号

2024-03-24

博士(工学)

As a result of recent improvements in computer performance and the research, development, and maintenance of various optimization methods, the number of cases achieve the rational structural designed and high productivity has increased significantly in the field of structural design applying to optimization techniques. However, due to various issues, there are application examples of optimization method in the seismic design of skyscrapers. In addition, there are urgent issues to improve the efficiency of practical design sites, such as the shortage of structural engineers due to aging population and declining birthrate, and the movement toward shortening working hours due to work style reforms. In this paper, we proposed a design method that combines optimization elastic-plastic response characteristics and sectional optimization to get frame model implementing those characteristics for practical structural design sites. We validated the proposal method by applying to 100m height seismic control skyscraper and confirmed a validity of that. This paper consists of Chapters 1 to 6, and the outline of each ministry is as follows. In chapter 1 “Introduction”, we stated the background that led to this research, summarized previous research, and described the significance and purpose of this research. In chapter 2 “Study on the applicability of optimization methods using response surfaces”, we investigated the applicability of response surface method that combines response surface and previous optimization algorithm to multi-objective optimization problem of allowable stress design for mid-high-rise buildings assuming practical structure design of steel frame. In chapter 3 “Study on seismic design of high-rise buildings using optimization and response characteristic evaluation functions”, We investigated multi-objective optimization considering elastic-plastic response characteristics using multi degree of freedom model with a view to applying optimization methods to the seismic design skyscrapers. In chapter 4 “Seismic design method for seismic control system skyscrapers using multi-step optimization”, we summarized the issues of seismic design of skyscrapers adopted seismic control structure in practical structure design and proposed seismic design method for them using multi-step optimization methods to contribute to solve the problems. Furthermore, we also organized the optimization problems in each phase of the proposed design method and the simultaneous optimization problems that handle multiple optimization problems at the same time. In chapter 5 “Study on the applicability of the proposed seismic design method”, we applied the design method proposed in Chapter 4 to a 100m height seismic control steel frame structure using CFT columns and steel columns. In chapter 6 “Conclusion”, we summarized the results obtained in this paper and mentioned future challenges and prospects for this study.

Thesis