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Seismic analysis of steel structure with brace configuration using topology optimization
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 Title & Authors
Seismic analysis of steel structure with brace configuration using topology optimization
Qiao, Shengfang; Han, Xiaolei; Zhou, Kemin; Ji, Jing;
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.
brace;topology optimization;truss-like;story drift;dynamic time-history analysis;
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