Story shear distribution of high-strength steel frame with D-eccentric brace based on multi-seismic-hazard levels
A high-strength steel frame with D-eccentric braces(D-HSS-EBF)includs Q355 steel for the energy-dissipating components,while the non-energy dissipating components,such as columns and beams,uses the high strength steel Q460,which is a new seismic resistant structure.The links are found to develop full plastic deformation when the structure suffer rare earthquakes.The story shear distribution is not suitable for the capacity-based design method,because the stiffness of D-HSS-EBF is changed under plastic state.Therefore,this paper presents the elastic-plastic story shear distribution of D-HSS-EBF under various seismic hazard levels.Based on this,the prototype structures of D-HSS-EBF are designed considering different stories(4-,8-,12-,and 16-stories)and different link length(900 mm,1000 mm and 1100 mm),and the story shear distribution modes under various seismic hazard levels are raised under near-fault ground motions and far-fault ground motions.Furthermore,the parameters of the story shear distribution under rare earthquakes are determined by the elastic-plastic lateral force.
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