| Summary |
The present paper proposes a procedure to evaluate seismic performance of a flat steel spatial structure for roof. The structure is installed a kind of H sectioned steel columns with passive controllability, and the steel columns supporting the roof are then supported by RC columns as substructure. First, five seismic forces for design are defined based on the previous researches reflecting the dynamic global and local behavior of the structure subject to seismic accelerations: (1) A global seismicforce is defined based on a conventional design practice using Aidistribution factor, (2) UD seismic force, and (3) three seismic forces considering local response of substructure. Based on the five seismic forces, three important combinations for seismic forces to be applied in design are introduced. Second, the conditions in design to be satisfied for performance are defined considering ultimate limit state in terms of stresses and deformations. Finally, several comments and required further researches are discussed.
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