Effect of SMA Braces in a Steel Frame Building
| Autor: | Rubén Boroschek, Gloria Farias, Mauricio Sarrazin, Ofelia Moroni |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Engineering
business.industry Stiffness Building and Construction Fundamental frequency Shape-memory alloy Structural engineering Dissipation Geotechnical Engineering and Engineering Geology SMA Bracing Damper medicine Earthquake shaking table medicine.symptom business Civil and Structural Engineering |
| Zdroj: | Journal of Earthquake Engineering. 11:326-342 |
| ISSN: | 1559-808X 1363-2469 |
| DOI: | 10.1080/13632460601125763 |
| Popis: | Pull-back and shaking table test results on a simple model of a three-storey structure that includes shape memory alloys (SMA) copper-based dampers are presented and discussed. The model corresponds to a rigid-framed steel structure and the dampers to austenite CuAlBe wires inserted as bracing at each story. The inclusion of the dissipators in the structure increases the percentage of critical damping from 0.59% for the bare case to 5.95% for the braced system. At the same time, the structural stiffness increases making the first fundamental frequency change from 2.5–3.7 Hz (0.4–0.27s). The net effect of these two factors is a 30–60% reduction of peak relative displacements compared to the ones obtained without dissipation devices when the structure is subjected to earthquake records. Depending on records frequency contents, a reduction of the peak accelerations to near 58% also can be obtained. Additionally, a crude nonlinear analytical model has been studied that can predict the earthquake responses rea... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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