Characterizing Blast and Impact of Long Carbon Fiber Reinforced Concrete
Open Access
- Author:
- Musselman, Eric
- Graduate Program:
- Civil Engineering
- Degree:
- Doctor of Philosophy
- Document Type:
- Dissertation
- Date of Defense:
- July 10, 2007
- Committee Members:
- Andrea Schokker, Committee Chair/Co-Chair
Daniel Linzell, Committee Member
Lyle Norman Long, Committee Member
Andrew Scanlon, Committee Member - Keywords:
- blast
impact
carbon fiber
concrete - Abstract:
- The primary objective of the study was to investigate the blast and impact resistance of carbon fiber reinforced concrete. The impact resistance was assessed through the use of both instrumented and uninstrumented impact testing conducted on two-way, simply supported panels. The blast resistance was examined by qualitatively comparing the behavior of a standard reinforced concrete and fiber reinforced concrete exposed to the same blast loadings. The blast specimens consisted of six foot square by 6.5 inch deep concrete slabs exposed to 75 lbs of TNT at a standoff distance of 3.2 feet. The results of both dynamic tests indicate the addition of carbon fibers significantly improves the blast and impact resistance of concrete. In addition to dynamic testing, static testing was also conducted to determine the material properties of the carbon fiber reinforced concrete. These tests included tensile, compressive and flexural testing. Tensile testing was conducted using split cylinder testing as well as a direct tensile test developed through this testing program. A comparison of these methods in addition to the standard modulus of rupture test is included. Compressive testing was conducted to determine the modulus of elasticity, Poisson’s ratio, and ultimate compressive strength. Flexural testing included standard modulus of rupture beams as well as larger scale beam and slab strip testing. Finally a material model was developed and a finite element analysis was conducted on the instrumented impact and blast testing using the software program LS Dyna. The material models were calibrated using the instrumented impact testing, and reasonable accuracy was achieved. However, additional research needs to be completed before an acceptable blast testing model can be developed.