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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 4: Structural Stability

Optimal design of buckling-restrained braces for super tall building

< Table of Contents for General 4: Structural Stability
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 4: Structural Stability
  • Title: Optimal design of buckling-restrained braces for super tall building
  • Author(s): Xin ZHAO, Hongwei ZHANG
  • Keywords: super tall building; buckling-restrained brace; optimal number; intergrated optimization
Abstract
Buckling-restrained brace(BRB)has been widely applied in tall buildings to dissipate energy in moderate and rare earthquake. Meanwhile the internal force of structural elements can be reduced due to additional damping ratio generated by the installation of BRBs, thus enable further optimization for the sectional dimension of structural components. This paper aims to introduce an optimal quantity positioning method and optimize the main structure. The seismic performance objectives and the controlling factors for the structural components design in the super tall buildings will also be presented and investigated. The design procedure of the optimal structures will be also ensured to meet the design requirements. A super tall building with belt truss frame corewall structural system is exemplified to show effectiveness of proposed optimal design of the BRBs and the structural components. The analysis result shows that the structure cost will be minimized with optimal quantity of BRBs and appropriate structural element dimension.

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