Seismic Steel Design 12/9/2012 Concentrically Braced Frames (CBFs) Types of CBFs cal trus elastic action in braces ☑因☒ a ·less ductile thanhsytm(SMFs.EBFs,BRBF到 图☒ reduced architectural versatility by Dr.Carlos E.Ventura,UBCSeismic Steel Design 12/9/2012 by Dr. Carlos E. Ventura, UBC 6 Concentrically Braced Frames (CBFs) Beams, columns and braces arranged to form a vertical truss. Resist lateral earthquake forces by truss action. Develop ductility through inelastic action in braces. - braces yield in tension - braces buckle in compression Advantages - high elastic stiffness Disadvantages - less ductile than other systems (SMFs, EBFs, BRBFs) - reduced architectural versatility Types of CBFs Single Diagonal Inverted V- Bracing V- Bracing X- Bracing Two Story X- Bracing