Experimental evaluation of geomembrane / geotextile interface as base isolating system

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2016

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Taheri Bonab, Amin

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The objective of this study is to evaluate the effect of the composite liner seismic isolation system on the seismic response of small-to-moderate height structures. For this purpose, a building model with the natural frequency of 3.13 Hz (representing 3-4 story structures) was tested with and without the addition of composite liner system using the shaking table test set-up by employing harmonic and modified/ scaled ground motions. Experiment results showed that the composite liner seismic isolation system significantly reduced the floor accelerations, especially in moderate-to-high ground shaking levels. The interaction between the natural frequency of the model and the frequency of the loading is evaluated by integrating the test results obtained here with previously conducted experiments on similar models by Kalpakcı (2013). Analysis results displayed that the composite liner system is most effective when these two frequencies are close to each other. Based on the test results discussed here, a mean spectrum was derived to define the behavior of the isolation system in frequency domain under ground motion excitation.

Subject Keywords

Seismology., Geotextiles., Geomembranes., Composite materials., Structural Dynamics., Earthquake resistant design.

URI

http://etd.lib.metu.edu.tr/upload/12619992/index.pdf
https://hdl.handle.net/11511/25649

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Taheri Bonab, “Experimental evaluation of geomembrane / geotextile interface as base isolating system,” M.S. - Master of Science, Middle East Technical University, 2016.