Study On The Seismic Design And Optimization For Frame-shear And Frame Core Tube Structures Using Hyperworks

There are two purposes of structural seismatic optimization to achieve, one is to improve the seismic performance of structure, the other one is to reduce the design cost. Frame shear wall structure and frame-core tube structure frequently used in high-rise buildings, because of the current structural design of widespread structural design cycle is short, many structures exist waste building materials, and structural seismic performance design does not reach the designated position. Structural design optimization based on artificial repeated trial method, the workload is large and the efficiency is low. Therefore, the research uses the optimization software implementation seismic analysis has important significance for engineering design optimization. In this paper, frame-shear wall and frame-core tube structures seismic design and optimization based on Hyperstudy, the main content includes:(1) Described the frame-shear wall and frame-core structure of the double resistance to lateral force system, the key is to coordinate the relationship between the stiffness with strength and structure of the second line of defense of aseismic design, consciously strengthen the main stress components and weaken the secondary energy dissipation components.(2) Summarized the frame-shear wall and frame-core structure seismic design of the overall control index and its adjustment method, and the component design of cross section and the reasonable measure of reinforcement.(3) Performed sensitivity levels between the maximum displacement ratio and story drift with the components of a high-rise building with a transition story. It is showed DOE sensitivity analysis of main components could improve the efficiency of the following optimization and design adjustment of the complex structure.(4) Develop a program OptiDesign (Ver2.0), which allows for linking HyperStudy with SAP2000and obtain response indices computed by SAP2000,such as stress ratio of beams and columns inter-floor shear forces, the proportion of frames shear force in the first story, and the total cost of the structure. (5) A shear-wall tube structure seismic performance optimization analysis based on HyperStudy, it is showed that the optimized structure weight decreased by5%. and structure of the first period increased by nearly6%, drifts decreases by10%, base shear decreased by8%, the first floor frames distribution of shear ratio rose to15%from3%in y direction, and achieved the desired optimization goal.(6) A steel frame-core tube structure seismic designed and economic optimized based on Hyperstudy, the frames adopted steel components, because of the steel quantity is large in this project, the total cost is high. Obtain sensitivity analysis between the cost with components, the biggest one was outside the ring beam, the frame beams in y direction, and the6th to36th story column section. The least sensitive upper of the core tube shear wall thickness. Through structural optimization and section adjustment,16%of the total cost is saved, the structure indices refers to all the control within the specification limits, such as drifts of, and the optimization effect is obvious.