Find the major principal stress ( σ ′ 1 ) at failure.

Question

For this exercise consider the single-bay building framing plan shown below, which you have considered previously. It has been decided to change from concrete framing to structural steel framing. A steel deck and concrete slab with a total thickness of five inches spans between the steel beams, and the steel beams are supported by steel girders along two edges. Assume all beams and girders are simple span and design the interior beams and edge girders. Use a design live load of 80 pounds per square foot. The slab dead load is 70 pounds per square foot, which includes the weight of the slab, beams, girders, and superimposed dead loads (mechanical, ceiling, floor finish, etc.). The beams may be assumed to have continuous lateral support from the floor slab. The girders should be assumed to be braced only by the beams (i.e., unbraced length equals beam spacing). The columns supporting the framing have been designed and do not need to be considered. Use steel yield strength Fy = 50 ksi for…

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Chapter 12, Problem 12.9P

To determine

Find the major principal stress (σ′1) at failure.

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For this exercise consider the single-bay building framing plan shown below, which you have considered previously. It has been decided to change from concrete framing to structural steel framing. A steel deck and concrete slab with a total thickness of five inches spans between the steel beams, and the steel beams are supported by steel girders along two edges. Assume all beams and girders are simple span and design the interior beams and edge girders. Use a design live load of 80 pounds per square foot. The slab dead load is 70 pounds per square foot, which includes the weight of the slab, beams, girders, and superimposed dead loads (mechanical, ceiling, floor finish, etc.). The beams may be assumed to have continuous lateral support from the floor slab. The girders should be assumed to be braced only by the beams (i.e., unbraced length equals beam spacing). The columns supporting the framing have been designed and do not need to be considered. Use steel yield strength Fy = 50 ksi for…

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