Achieving Improved Construction Efficiency for Multi-Story Steel Concentrically Braced Frames

다국어 초록 (Multilingual Abstract)

Volumetric steel modules were proposed in this study to improve construction effi ciency of multi-story steel concentrically braced frames. Two types of modules, (1) gravity modules and (2) braced modules, which features the steel concentrically braced frame (CBF) system, are fi rst introduced. The proposed braced module consists of steel CBFs to carry lateral seismic or wind loads. The module assembly and construction sequence are then presented. The structural design of the modules is performed in accordance with the Canadian steel design standard. An analysis of the structural costs is then carried out on a prototype building consisting of the volumetric modules to evaluate the cost effi ciency of the system as compared to a conventional braced frame system. The gravity and lateral load-carrying capacities of a two-story CBF subassembly are fi nally examined under lateral seismic loads using continuum-based fi nite element analysis with emphasis on the inelastic response of braces. The results of the cost analysis confi rm the potential benefi ts off ered by volumetric gravity and braced modules to improving construction effi ciency of steel CBFs through off -site construction of the modules and on-site assembly.
Furthermore, the results obtained from the structural response evolution of the CBF subassembly suggest an acceptable lateral load-carrying capacity and appreciable ductility capacity provided by braced modules.

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