PROCÉDÉ DE CALCUL DE LA CAPACITÉ DE RÉSISTANCE ANTI-SISMIQUE D'UN COMPOSANT STRUCTUREL SUR LA BASE D'UN NIVEAU DE PERFORMANCE

摘要

The present disclosure relates to the technical field of seismic design, and provides a method for calculating a seismic bearing capacity of a structural element based on performance levels, including: setting different performance levels based on a maximum interlayer displacement angle of a structure, and calculating top displacements of the structure at different performance levels; according to a mass participation factor of a first mode shape and the top displacements of the structure at different performance levels, determining displacements of the first mode shape; according to the displacements of the first mode shape, obtaining a displacement of an equivalent single-degree-of-freedom system; selecting a plurality of ground motions suitable for a site, obtaining a plurality of seismic influence coefficients of the first mode shape at different performance levels; based on an average peak acceleration of the plurality of ground motions at different performance levels and according to a design response spectrum specified by a seismic code, obtaining a plurality of seismic influence coefficients; synthesizing a seismic action of the structure at different performance levels under the plurality of mode shapes; and calculating the bearing capacity. The seismic bearing capacity of the structural element is calculated based on the performance levels, and thus the seismic design method is more scientific.