Abstract

JUAREZ OCAMPO, Héctor G.; RODRIGUEZ, Mario E.  and  GOMEZ FLORES, Francisco. Seismic tests on shaking table of a miniature building with base isolators. Ing. sísm [online]. 2021, n.105, pp.1-30.  Epub Oct 04, 2021. ISSN 0185-092X.  https://doi.org/10.18867/ris.105.559.

Shaking table tests were conducted in previous research at the National University of Mexico (UNAM) on a miniature steel building named EM2, using a strong ground motion record. This building represented a conventional building. This paper describes the results of a second test unit called EM2-I, tested in the same shaking table with the same ground motion used in the test of EM2. The test unit with isolators, EM2-I, had a superstructure identical to that of the test unit EM2 but with base isolators of double friction pendulum type. Measured maximum interstory drifts were equal to 5.3% and 0.97% for test units EM2 and EM2-I, respectively. Measured maximum global drift was equal to 4% and 0.63% for test units EM2 and EM2-I, respectively. The maximum seismic coefficient measured in the isolated superstructure was equal to 26 % of the maximum value for this parameter measured in test unit EM2. Implications of the results in this research are discussed in this paper, showing the importance of using isolated structures as an efficient solution for resisting strong earthquakes and capable of immediate occupancy.

Keywords : shaking table, friction pendulum isolators; interstory drift; floor accelerations; seismic damage.

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