Resumen

RODRIGUEZ-MORALES, José A.  y  RUIZ-GOMEZ, Sonia E.. OPTIMAL TOLERABLE DRIFT FOR IMPORTANT BUILDINGS DESIGN, CONSIDERING CONTENT DAMAGE. Ing. sísm [online]. 2025, n.114, e683.  Epub 18-Ago-2025. ISSN 0185-092X.  https://doi.org/10.18867/ris.114.683.

A methodology is presented to determine the optimal value of the maximum interstory drift (δOI) that ensures compliance with the Immediate Occupancy (IO) performance level, a requirement for essential structures (Group A) according to the Complementary Technical Norm for Seismic Design (NTC-DS-2023). The methodology is developed in two stages: in the first, the exceedance rate of the structural response is determined by integrating structural fragility curves with the seismic intensity exceedance rate at the site. In the second stage, the total expected cost during the building's lifecycle is evaluated through numerical simulation, with emphasis on economic losses due to damage corresponding to acceleration-sensitive contents. To perform this evaluation, a cost function for content damage is proposed, which considers the maximum floor acceleration and its variation along the building’s height. This function is first formulated at the inventory level and later at the global level. The methodology is applied to a five-story school building constituted by reinforced concrete moment-resisting frames, located in the transition zone of Mexico City. For the structural design four permissible values of δOI are assumed: 0.005, 0.0075, 0.01, and 0.0125. It is found that the maximum interstory drift corresponding to the minimum expected total cost is 0.01, value that exceeds the limit specified by NTC-DS-2023, which is 0.0075 for reinforced concrete frames.

Palabras llave : tolerable maximum drift; optimal design drift; content damage; school buildings; expected total cost; life-cycle.

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