American Society of Civil Engineers


Feasibility of Thermoplastic Composite Jackets for Bridge Impact Protection


by Nasim Uddin, (Dept. of Civ. and Envir. Engrg., Univ. of Alabama at Birmingham, 1075 13th St. South HOEN 321, Birmingham, AL 35294-4440. E-mail: nuddin@uab.edu), John D. Purdue, (Dept. of Civ. and Envir. Engrg., Univ of Alabama at Birmingham, 1075 13th St. South HOEN 321, Birmingham, AL 35294-4440), and Uday Vaidya, (Dept. of Civ. and Envir. Engrg., Univ. of Alabama at Birmingham, 1075 13th St. South HOEN 321, Birmingham, AL 35294-4440)

Journal of Aerospace Engineering, Vol. 21, No. 4, October 2008, pp. 259-265, (doi:  http://dx.doi.org/10.1061/(ASCE)0893-1321(2008)21:4(259))

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Document type: Technical Note
Special Section: Impact Behavior and High Energy Absorbing Materials
Abstract: The research focused on the effects of low velocity impact loading on high-strength concrete confined by a prefabricated polypropylene jacket and comparing the results with similar specimens confined by carbon fiber-reinforced polymer (CFRP) composites. In order to accomplish this, both static and dynamic load tests were performed. Concrete cylinders were used for static loading. Twelve concrete cylinders were prepared for static load testing: three were plain concrete and used as control specimens, three were wrapped with one layer of unidirectional CFRP composites, and six were confined by the polypropylene jacket. The thickness of the polypropylene wrap was machined to different thicknesses; three 3 mm and three 6 mm. The cylinders were standard (D x H) 152 mm x 305 mm. Cylinders were loaded to failure in uniaxial compression using a Tinius-Olsen Universal Testing Machine. Impact testing was performed using four (D x H) 152 mm x 914 mm columns. The columns consisted of one control sample; one CFRP composites wrapped, and two (one of each thickness) wrapped with polypropylene. Impact testing was conducted using an Instron drop-tower testing machine.


ASCE Subject Headings:
Bridges
Composite materials
Feasibility studies
Plasticity
Thermal factors