Crash Analysis of Truck and Portable Concrete Barrier (PCB)

Arnob Banik

ab353@uakron.edu

PhD Candidate�Dept. of Mechanical Engineering�The University of Akron

Advisor�Dr. KT Tan

Advanced Metacomposites Laboratory

Report on

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Presentation Outline

• Objectives
• Truck Model
• Rebar Material Properties
• PCB Designs
• J-J Hook
• J-J Hook Alternate Reinforcing
• F-Shape
• F-Shape Modified Reinforcment
• Comparison
• Conclusion

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Objectives

• Modifying the reinforcing design of F-F shape PCB
• Comparing the crash performance with J-J hook PCB

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Truck Model

• Chevrolet Silverado 2007
• NHTSA
• Weight : 2 tons

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ASTM A615 Grade 60

Mass Density= 7.849e-09 tonne/mm3 (0.284 lb/in3)

Young’s Modulus= 2.0e+05 N/mm2 (29007) Ksi

Poisson’s Ratio= 0.3000000

Yield Stress = 413 N/mm2 (60 ksi)

ASTM A706 Grade 60

Mass Density= 7.849e-09 tonne/mm3 (0.284 lb/in3)

Young’s Modulus= 2.050e+05 N/mm2 (29733 Ksi)

Poisson’s Ratio= 0.29

Yield Stress = 468.843 N/mm2 (68 ksi)

ASTM A 36

Mass Density= 7.800e-09 tonne/mm3 (0.282 lb/in3)

Young’s Modulus= 2.0e+05N/mm2 (29007 Ksi)

Poisson’s Ratio= 0.26

Yield Stress = 255 N/mm2 (37 ksi)

Rebar Material Properties

For Reinforcement

For Hinge Bars or Steel Plate

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J-J Hook PCB

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Concrete

Compressive Strength = 34 Mpa (4930 Psi)

J-J Hook PCB

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J-J Hook PCB Reinforcing

Longitudinal Rebar (4)

J- Hook Connector

ASTM A706 Grade 60

ASTM A36

Deflection Limiter (4)

ASTM A706 Grade 60

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Truck and PCB Model

• Speed: 62 mph
• Direction: 25⁰
• PCB Length: 108 ft / 32.9184 m

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J-J Hook PCB

• J-J hook connection detached

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J-J Hook PCB Alternate Reinforcing

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J-J Hook PCB Alternate Reinforcing

Long Longitudinal Rebar (4)

J- Hook Connector

ASTM A706 Grade 60

ASTM A36

Deflection Limiter (4)

ASTM A706 Grade 60

Short Longitudinal Rebar (8)

ASTM A706 Grade 60

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J-J Hook PCB Alternate Reinforcing

• J-J hook connection detached

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F-shape PCB

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Concrete

Compressive Strength = 34 Mpa (4930 Psi)

F-shape PCB

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Longitudinal Bars (8)

Stirrup Bar (10 pair)

Pin slot Bar (6)

Loop Bar (6)

ASTM A615 Grade 60

ASTM A615 Grade 60

ASTM A615 Grade 60

ASTM A36

F-shape PCB

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F-shape PCB

• Pin Connection not broken or detached

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F-shape modified reinforcing PCB

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Longitudinal Bars (4)

Stirrup Bar (3 pairs)

Loop Bar (4)

ASTM A615 Grade 60

ASTM A615 Grade 60

ASTM A36

• Changes in Reinforcement
• Longitudinal bars – 8 to 4
• Stirrup bar – 10 pairs to 3 pairs
• Loop bar – 6 to 4
• No Pin slot bar

F-shape modified reinforcing

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F-shape modified reinforcing

• Pin Connection not broken or detached

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J-J Hook

J-J Hook Alternate Reinforcing (J-J Hook_AR)

F-Shape

F-Shape Modified Reinforcing (F-Shape_MR)

Comparison

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J-J Hook

J-J Hook_AR

F-Shape

F-Shape_MR

Eroded Volume

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J-J Hook

J-J Hook_AR

F-Shape

F-Shape_MR

Displacement

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Difference in Crash

J-J Hook

F-Shape_MR

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• J-J hook modified reinforcing showed 15% less eroded volume percentage
• F-shape PCB produced 44% less displacement than both J-J Hook PCB design
• J-J hook connection detached after hitting by the truck
• Pin connection in F-shape was not broken or detached because of the hitting by the truck.
• F-shape modified reinforcing PCB shows slightly higher eroded volume ratio and displacement than F-shape full reinforcement design.
• F-shape modified reinforcing PCB can be suggested to use for experimental outcomes.

Conclusion

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THANK YOU