Steel and Composite Structures

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Seismic analysis of steel structure with brace configuration using topology optimization

  • Qiao, Shengfang (School of Civil Engineering and Transportation, South China University of Technology) ;
  • Han, Xiaolei (School of Civil Engineering and Transportation, South China University of Technology) ;
  • Zhou, Kemin (College of Civil Engineering, Huaqiao University) ;
  • Ji, Jing (School of Civil Engineering and Transportation, South China University of Technology)
  • Received : 2015.12.08
  • Accepted : 2016.05.06
  • Published : 2016.06.30
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Abstract

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.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China

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