ARGENTINA RESUMEN SUMMARY INTRODUCCIÓNEn el diseño de estructuras, en principio se consideran los efectos gravitatorios y las cargas adicionales debidas a las sobrecargas según el uso del edificio. Cuando la estructura demanda una protección adicional para fuerzas ambientales como el viento, mareas y sismos, la solución para la tipología estructural empleada se puede encontrar en los sistemas de aislación y control de vibraciones. considerar y modelar tal que reproduzcan la situación real. Por lo tanto, el estudio de la respuesta estructural debe tener en cuenta estos efectos. El uso de estos sistemas se ha incrementado y desarrollado notablemente en los últi-mos años en el área de la ingeniería estructural, habiendõ n el mundo una enorme cantidad de edificios construidos con estas técnicas.En muchos casos la carga predominante de diseño de estructuras esbeltas son las cargas de viento. En estructuras muy altas (más de 70 m), las vibraciones causadas por el viento provocan problemas en la estructura principal, los

A plan of action was established following certain given guidelines:-The replica should have the same geometrical dimensions as the original rock. -It should be fi xed in the same position as the original rock. -It should be situated at the same place on Cerro La Movediza. -It should consist of a steel structure and it should be coated with a composite material capable of reproducing the colour and texture of the original rock. Activities Topographic StudiesThe planialtimetric topographic surveys determined the position and location of the replica. The geometry of the replica was determined from an analysis of the available information and from the survey of the geometry of the fallen rock that lies at the foot of the Cerro La Movediza. Infrared rays, laser electronic tachometres and GPS receiver systems were used to this end. 1523 points among the three exist-ing pieces of rock were surveyed in a planialtimetric way. The study showed that the rock had an approximate volume of 91 m 3 , an approximate weight of 248 tons and an external surface of approximately 133 m 2 . Geological and Geotechnical SurveysThese studies included, on one hand, the evaluation of the hill discontinuities existing in the location. It was observed that the hill had a fissure, the geological and geotechnical characteristics of which were studied, leading to the conclusion that this did not, in any way, render the task of anchoring the replica to the hill impossible.On the other hand, the characteristics of the rock base, which determined the depth of anchors and their size, were studied. It was reported that the solid rock on the hill had a granite structure and that it presented very good geological characteristics 2 ideal for anchoring the replica. Wind Tunnel StudyThis study allowed the assessment of the impact of the topography on the location and the geometry of the structure in the distribution of the wind pressure. The static and dynamic forces at the anchoring for each direction of the wind were also measured. The range of standard frequencies where higher levels of non-stationary aerodynamic load can be found was also determined.

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