PRELIMINARY STUDY ON DESIGN METHOD OF STEEL REINFORCED CONCRETE BEAM TRANSFER STRUCTURE WITH ENERGY DISSIPATION HAUNCH BRACE

A steel reinforced concrete (SRC) beam transfer structure with a supplemental energy dissipation haunch brace (EDHB) is a new kind of transfer structure whose state of internal forces and seismic performance is different from those normal energy dissipation structures, and lack of theory to guide its design process. Therefore, based on the established simplified calculation model of this kind of structure, formulas of the internal forces at the controlled cross sections are derived by the theoretical analysis method. A design method based on the ductility concept of “strong column-weak beam”, “strong shear-weak bending” and “strong joint-weak members” is established using the formulas. The analysis of design examples showed that, compared with a normal structure, the stiffness mutation at transfer storey can be efficiently reduced and the ductility of a structure can be improved when a SRC beam transfer structure with EDHB was designed by the presented design method. The design method presented by the paper can be the theoretical references for the design of the new type of transfer structure.