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Continue. Chapter 4. Design of Tension Members. Structural Steel Design, Fifth Edition, McCormac and Csernak , 2012 (International. 1. Structural Steel Design, Fifth Edition, McCormac and Csernak , 2012 (International. 2.

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chapter 4

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Chapter 4

Design of Tension Members

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International

1

slide17

The AISC nominal tensile design stress for threaded rods, Fnt , is given in AISC Table J3.2 and equals 0.75 Fu . This is applied to the gross area of the rod AD

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International

17

slide19

ASD method : AD ≥

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International

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slide28

Design for Fatigue Loads

  • Cyclic Loading or Repeated Loadings
  • Loads are applied, and then removed , or changed significantly
  • Structures with:
    • crane runway girders
    • heavy vibrating or moving machinery or equipment
  • ≥ 20,000 cycles of loadings in design life

f

fmax

fsr= fmax- fmin

time

fmin

fsr : Stress Range

28

slide29

Design for Fatigue Loads

  • Result in strength loss of material
  • Member may fail at stresses well below static design stress

Fsr: Allowable Stress Range

AISCM Appendix 3

f

fmax

fsr= fmax- fmin

time

fmin

fsr ≤ Fsr

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International

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slide31

Pn= PD + PL = 40 + 90 = 130 k

Ag ≥

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International

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slide37

HW # 3 Problems: 4-1 and 4-17

Structural Steel Design, Fifth Edition, McCormac and Csernak, 2012 (International

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