Abstract: This paper adopts the hybrid simulation method, taking the three- story plane linked column frame as the research object, aiming at the fire condition of the bottom middle column, carries out the fire resistance performance of the whole frame with solid elements, the whole frame with multi-scale elements, the whole frame with multi- scale hybrid simulation elements and traditional single column, then compares with the fire resistance limit, axial deformation, axial force and lateral deformation. The results show that the traditional fire column lacks the restraint effect and the fire resistance limit is smaller, the deformation rate of the axial deformation is faster in the later stage, and the larger lateral deformation occurs earlier, the result is conservative. The multi- scale hybrid simulation results are more consistent with the overall structure, the efficiency is improved under the premise of ensuring the accuracy. The conclusions verifies the feasibility of the hybrid simulation method for the fire resistance analysis of the whole structure, and provides a new method for the fire resistance analysis of the structure.

Key words: linked column frame, fire resistance, multi- scale, hybrid simulation, substructure