Shaking-Table Testing of High Energy-Dissipating Rubberized Concrete Columns
This paper presents the results of the first shake-table tests of a large-scale rubberized concrete column. The rubberized column was formed by replacing 20% of the volume of fine aggregate with crumb rubber. The response of the rubberized column was compared to that of a conventional bridge column. Both columns had the same construction details, and the only difference was the material used. Both columns were subjected to a sequence of scaled historical ground motion recorded in the Northridge-01 1994 earthquake with near-fault pulse-like characteristics. The conventional column formed a flexural plastic hinge with rebar fracture after 14 scaled test runs, corresponding to 140% of the design earthquake. The rubberized column experienced the rebar fracture after 19 test runs, corresponding to 190% of the design earthquake. The rubberized column achieved a strength that was only 3% lower than that of the conventional column. Moreover, the rubberized column displayed a 12.5% increase in the lateral drift capacity. The dissipated energy of the rubberized column increased by 16.5% compared with the conventional column.
A. Moustafa et al., "Shaking-Table Testing of High Energy-Dissipating Rubberized Concrete Columns," Journal of Bridge Engineering, vol. 22, no. 8, American Society of Civil Engineers (ASCE), Aug 2017.
The definitive version is available at https://doi.org/10.1061/(ASCE)BE.1943-5592.0001077
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Concrete construction; Concrete testing; Concretes; Earthquake effects; Energy dissipation; Fracture; Geophysics; Bridge columns; Rubberized concrete; Scrap tires; Seismic behavior; Shaking table tests; Earthquakes; Shaking-table test
International Standard Serial Number (ISSN)
Article - Journal
© 2017 American Society of Civil Engineers (ASCE), All rights reserved.
01 Aug 2017