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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. Which expression gives the Euler critical buckling load of a column?

    Answer: π²EI/(KL)²

    The Euler load is Pcr = π²EI/(KL)².

  2. What is the specified minimum yield strength of ASTM A992 steel, the standard for W-shapes?

    Answer: 50 ksi

    A992 has Fy = 50 ksi and Fu = 65 ksi.

  3. Lateral-torsional buckling capacity of a steel W-beam depends most directly on which parameter?

    Answer: Unbraced length of the compression flange (Lb)

    AISC F2 lowers flexural strength as Lb grows past Lp and again past Lr.

  4. What is the fixed-end moment at each support of a fixed-fixed beam under uniform load w over span L?

    Answer: wL²/12

    Each fixed-end moment is wL²/12, and the midspan moment is wL²/24.

  5. In the moment distribution method, what is the carry-over factor to a far end that is fixed (prismatic member)?

    Answer: 0.5

    For a prismatic member, half of the moment applied at the near end carries over to a fixed far end.

  6. Which prestress loss is instantaneous rather than time-dependent?

    Answer: Elastic shortening of concrete

    Elastic shortening happens the moment prestress is transferred; creep, shrinkage, and relaxation build up over time.

  7. Class F fly ash, used as a supplementary cementitious material, is best described as:

    Answer: Low-calcium pozzolan

    Class F fly ash is a low-calcium pozzolan that reacts with calcium hydroxide and has little self-cementing ability.