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Structural Engineering and Materials Flashcards

7 cards from real ASCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Structural Engineering and Materials flashcards as text

  1. What is the theoretical effective length factor K for a column with both ends fixed against rotation and translation?

    Answer: 0.5

    A fixed-fixed column buckles with inflection points at quarter-lengths, giving a theoretical K of 0.5.

  2. What is the maximum bending moment in a simply supported beam of span L carrying a uniform load w?

    Answer: wL²/8

    For a simply supported beam under uniform load, the midspan moment is wL²/8.

  3. Under ACI 318, what strength reduction factor (φ) applies to tension-controlled flexural sections?

    Answer: 0.90

    ACI 318 assigns φ = 0.90 to tension-controlled sections because they fail in a ductile way.

  4. What is the approximate modulus of elasticity of structural steel?

    Answer: 29,000 ksi

    Structural steel has E ≈ 29,000 ksi (200 GPa), regardless of grade.

  5. Per ACI 318, the modulus of elasticity for normal-weight concrete (psi) is approximated as:

    Answer: 57,000√f'c

    ACI gives Ec = 57,000√f'c in psi for normal-weight concrete.

  6. What is the typical Poisson's ratio for structural steel?

    Answer: 0.30

    Steel's Poisson's ratio is about 0.3; concrete's is about 0.15 to 0.20.

  7. What is the maximum deflection of a cantilever of length L with a point load P at its free end?

    Answer: PL³/3EI

    The tip deflection of a cantilever with an end point load is PL³/3EI.