The value of φLT in bending stress reduction factor is given by(a) φLT= [ 1 – αLT (λLT + 0.2) + λ^2LT].(b) φLT= [ 1 + αLT (λLT – 0.2) + λ^2LT].(c) φLT= 0.5 [ 1 – αLT (λLT + 0.2) + λ^2LT].(d) φLT= 0.5 [ 1 + αLT (λLT – 0.2) + λ^2LT].I had been asked this question during an interview.Question is taken from Design Strength of Laterally Unsupported Beams in division Design of Beams of Design of Steel Structures

The value of φLT in bending stress reduction factor is given by(a) φ

1.	The value of φLT in bending stress reduction factor is given by(a) φLT= [ 1 – αLT (λLT + 0.2) + λ^2LT].(b) φLT= [ 1 + αLT (λLT – 0.2) + λ^2LT].(c) φLT= 0.5 [ 1 – αLT (λLT + 0.2) + λ^2LT].(d) φLT= 0.5 [ 1 + αLT (λLT – 0.2) + λ^2LT].I had been asked this question during an interview.Question is taken from Design Strength of Laterally Unsupported Beams in division Design of Beams of Design of Steel Structures
Answer» The CORRECT answer is (d) φLT= 0.5 [ 1 + αLT (λLT – 0.2) + λ^2LT]. EASIEST explanation: The value of φLT in bending stress reduction FACTOR is given by φLT= 0.5 [ 1 + αLT (λLT – 0.2) + λ^2LT], where αLTis IMPERFECTION factor, λLT is non dimensional slenderness ratio.

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