Techno Press

Steel and Composite Structures   Volume 21, Number 3, June30 2016, pages 501-515
Seismic analysis of steel structure with brace configuration using topology optimization
Shengfang Qiao, Xiaolei Han, Kemin Zhou and Jing Ji

Abstract     [Full Text]
    Seismic analysis for steel frame structure with brace configuration using topology optimization based on truss-like material model is studied. The initial design domain for topology optimization is determined according to original steel frame structure and filled with truss-like members. Hence the initial truss-like continuum is established. The densities and orientation of truss-like members at any point are taken as design variables in finite element analysis. The topology optimization problem of least-weight truss-like continuum with stress constraints is solved. The orientations and densities of members in truss-like continuum are optimized and updated by fully-stressed criterion in every iteration. The optimized truss-like continuum is founded after finite element analysis is finished. The optimal bracing system is established based on optimized truss-like continuum without numerical instability. Seismic performance for steel frame structures is derived using dynamic time-history analysis. A numerical example shows the advantage for frame structures with brace configuration using topology optimization in seismic performance.
Key Words
    brace; topology optimization; truss-like; story drift; dynamic time-history analysis
(1) Shengfang Qiao, Xiaolei Han, Jing Ji:
School of Civil Engineering and Transportation, South China University of Technology, Tianhe, Guangzhou, 510641, China;
(2) Kemin Zhou:
College of Civil Engineering, Huaqiao University, Jimei, Xiamen, 361021, China.

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