DEVELOPMENTS OF THE CURRENT PERFORMANCE-BASED SEISMIC

Performance-based design has been widely recognized as an idealized method for future seismic design in practice. A draft seismic design code for buildings by introducing performance-based design methodology has been proposed in this research. First of all, the current code provisions have been examined according to the theoretical basis of PBSD. Several key issues have then been investigated to clarify why, what and how to incorporate the methodology of PBSD in domestic seismic design code currently. In the proposed draft code, transparent seismic design objectives and criteria for buildings of different use group have been established quantitatively. Drift limit for each considered earthquake level is clearly established. Site feasibility requirement, conceptual design scope and basic rule have been modified considering use group. A performance objective oriented preliminary design procedure is proposed. Direct displacement-based design procedures have been summarized in the appendix. Methods and procedures for seismic performance evaluation have been presented. Finally in this paper, what we have learned through the applied examples will be summarized. We believe that performance-based seismic design technology will bring a new era to engineering practice with increased confidence and reliability on seismic safety