Study On Wind-Resistant Design Methods Of Frame Structure Using Topology Optimization Theory

Wind load is the most important and the most common type of building loads. Compared with the earthquake, the duration of the wind load is longer, the frequency of strong wind is higher, and the effect on the working life of the building under wind load is greater. The frame structure is the most widely used structure system of industrial and civil buildings currently, and the optimization on frame structure is a good research direction which deserves more attention. Structural topology optimization can greatly improve the performance of the frame structure, or reduce the weight of the structure in the case of keeping the original stiffness of the structure, which brings directly economic benefits from the perspective of environmental protection and saving. The method provides designers a conceptual design idea in the initial stage of the structure design and brings the structure the optimal solution on the layout, so compared with the size or the shape optimization, the designers will accepted it more easily and obtain greater economic benefits from it. Therefore, the research on designing of Wind-Resistant Design of frame structure based on topology optimization methods has a very important significance. In this context, this paper carried out the following aspects of work:Firstly, the author used finite element software ANSYS to analyze a12-story frame-bracing system, calculated the weight load deformation and sixth-order modal calculation results, and nodal displacements of each layers of the frame-braces system under wind loads. The results showed that the overall performance of full-diagonal-braces-frame is much better than none-bracing frame. Secondly, on the basis of full-diagonal-braces-frame structure, the author made the optimization based on Hypermesh topology optimization module, in which the constraint condition was the numbers of additional diagonal brace.At last, the author selected and modified the optimization result, and the modified result indicate that it is more reasonable when brace layout position focused on the bottom and the side span of the structure and the brace number is27%, and in addition, the performance is more close to the full-diagonal-braces-frame. All the above demonstrate that wind resistance design based on topology optimization of frame-braces structure is effective and feasible.