Steel and Composite Structures

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Conceptual configuration and seismic performance of high-rise steel braced frame

  • 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) ;
  • Li, Weichen (School of Civil Engineering and Transportation, South China University of Technology)
  • Received : 2016.09.18
  • Accepted : 2016.12.16
  • Published : 2017.02.10
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Abstract

Conceptual configuration and seismic performance of high-rise steel frame-brace structure are studied. First, the topology optimization problem of minimum volume based on truss-like material model under earthquake action is presented, which is solved by full-stress method. Further, conceptual configurations of 20-storey and 40-storey steel frame-brace structure are formed. Next, the 40-storeystructure model is developed in Opensees. Two common configurations are utilized for comparison. Last, seismic performance of 40-storey structure is derived using nonlinear static analysis and nonlinear dynamic analysis. Results indicate that structural lateral stiffness and maximum roof displacement can be improved using brace. Meanwhile seismic damage can also be decreased. Moreover, frame-brace structure using topology optimization is most favorable to enhance lateral stiffness and mitigate seismic damage. Thus, topology optimization is an available way to form initial conceptual configuration in high-rise steel frame-brace structure.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China, SCUT

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