DIRECT DISPLACEMENT-BASED SEISMIC DESIGN METHOD OF SRC COLUMN-STEEL BEAM HYBRID FRAMES

The SRC column-steel beam hybrid frame structure has good seismic behavior, which is widely used in large span structures and high-rise buildings. However, few studies have been performed on seismic design of the SRC column-steel beam hybrid frame structures. According to the characteristics of the SRC column-steel beam hybrid frame structure, its seismic performance is divided into four levels, i.e., serviceability, temporary use, use after repair, and close to collapse. The four levels is quantified using the inter-story drift ratio limits, based on which the direct displacement-based seismic design method of SRC column-steel beam hybrid frame is proposed. The PQ-FIBER model in ABAQUS is used to analyze the static elasto-plastic performance of the SRC column-steel beam hybrid frame, and the applicability of the PQ-FIBER model is validated by the existing experimental results. Finally, the method has been successfully applied to an eight-storey SRC column-steel beam hybrid frame structure, and is validated by static elasto-plastic analysis. The proposed method herein can form a basis for the direct displacement-based seismic design of the SRC column-steel beam hybrid frame structure.