Flashcards on Reinforced Concrete Design: Principles and Elements
Reinforced Concrete Design: Principles & Elements for Students
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Reinforced Concrete Design Fundamentals
102 cards
Card 1
Question: What is reinforced concrete (RC)?
Answer: A composite material combining concrete and steel reinforcement so both act together to resist loads, providing strength, durability, and versatility.
Card 2
Question: Why are concrete and steel considered complementary materials in RC?
Answer: Concrete is strong in compression and durable, while steel provides good tensile and shear strength; combined they compensate for each other's weaknes
Card 3
Question: How does tensile strength of concrete compare to its compressive strength?
Answer: Concrete’s tensile strength is only about 10% of its compressive strength.
Card 4
Question: In RC design, how is tensile force typically resisted?
Answer: By steel reinforcement, since concrete is assumed not to resist tensile forces.
Card 5
Question: What is meant by 'composite action' in reinforced concrete?
Answer: The concrete and steel act together to resist loads through bond at their interface so strains in steel equal strains in adjacent concrete (assuming p
Card 6
Question: Why must reinforcement be properly detailed and concrete well compacted?
Answer: To ensure good bond between steel and concrete; inadequate bond causes bar slip and loss of composite action.
Card 7
Question: What are common ways to improve mechanical bond of reinforcement?
Answer: Using ribbed or twisted bars to provide extra mechanical grip.
Card 8
Question: What assumption about strain is used in analyzing a reinforced concrete section?
Answer: That there is perfect bond so strain in the reinforcement is identical to strain in the adjacent concrete (strain compatibility).
Card 9
Question: How do the coefficients of thermal expansion for steel and concrete compare and why is this important?
Answer: Steel ≈ 10×10⁻⁶/°C; concrete ≈ 7–12×10⁻⁶/°C, sufficiently close so differential thermal expansion rarely causes bond problems over normal temperature
Card 10
Question: What happens in concrete wherever tension occurs under bending?
Answer: Cracking is likely to occur where tension develops in the concrete.