A multilevel performance based seismic design method for reinforced concrete structures

摘要

A method for a multilevel performance-based seismic design of reinforced concrete structures is presented. The procedure defines a structure that does not surpass the exceedence rates of the performance indices which characterize multiple design limit states and their corresponding seismic demands generally defined by means of uniform hazard spectra. To illustrate and validate this method this paper only deals with the serviceability limit state, for which the structure behaves elastically and the ultimate, for which an acceptable distribution of damage is also considered. As example the design of a 17 storey reinforced concrete plane frame is described using as demands response spectra calculated from real records at a site in Mexico City consistent,with the seismic demands associated to the design limit states. The quality of the results obtained is assessed by comparing the design performance indices with those obtained from nonlinear dynamic analysis using the design earthquake records, the agreement found was satisfactory.