Abstract

DIAZ MARTINEZ, Gerardo; TERAN GILMORE, Amador  and  REYES SALINAS, Carlos. Diseño basado en desplazamientos de estructuras esenciales. Ing. sísm [online]. 2013, n.89, pp.78-100. ISSN 0185-092X.

The pertinence of using an importance factor during the seismic design of essential facilities located in soft soil is assessed through the use of equivalent single-degree-of-freedom systems. Because of the large vulnerability shown by some of these systems in terms of their drift demands, a displacement-based methodology aimed at the conception of structural systems capable of adequately controlling the level of structural and non-structural damage in essential facilities is formulated. The methodology is applicable to buildings structured with moment-resistant frames; and contemplates the occurrence of severe ground motions. To control the levels of structural and non-structural damage within acceptable thresholds, the simultaneous control of the maximum plastic rotation and inter-story drift index demands is formulated. The examples developed in the paper show that the use of the methodology results in essential facilities that are capable of satisfying the Immediate Occupancy performance level after the occurrence of the design ground motion.

Keywords : importance factor; essential facilities; performance-based design; immediate occupancy.

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