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Zeynep Aladağ

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In steel element design, the design ratio under the influence of combined axial force and biaxial bending (PMM ratio) is made in accordance with the Design, Calculation and Construction Principles of Steel Structures (GKT and by the ÇYTHYE 2016 (GKT & YDKT), AISC 360-16 (ASD and & LRFD) or EN 1993-1-1 regulations. . According to the Design, Calculation and Construction Principles of Steel Structures (GKT and YDKT), the calculation of AISC 360-16, axial force and biaxial bending interaction equations is stated are calculated below.

Mathinline
body--uriencoded--$$ \normalsize (a) \; \; \dfrac%7BP_r%7D%7BP_c%7D \ge 0.2 \; \; \; \; \; \; \; \; \dfrac%7BP_r%7D%7BP_c%7D + \dfrac%7B8%7D%7B9%7D \bigg( \dfrac%7BM_%7Brx%7D%7D%7BM_%7Bcx%7D%7D + \dfrac%7BM_%7Bry%7D%7D%7BM_%7Bcy%7D%7D \bigg) \le 1.00 $$

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body--uriencoded--$$ \normalsize (b) \; \; \dfrac%7BP_r%7D%7BP_c%7D < 0.2 \; \; \; \; \; \; \; \; \dfrac%7BP_r%7D%7B2P_c%7D + \bigg( \dfrac%7BM_%7Brx%7D%7D%7BM_%7Bcx%7D%7D + \dfrac%7BM_%7Bry%7D%7D%7BM_%7Bcy%7D%7D \bigg) \le 1.00 $$

  • The PMM ratio value must should be less than 1,00.

Possible Solutions:

  • The lateral retention Laterally unbraced length can be reduced by defining tension rods in the steel ties.

  • After the ties are defined, the undivided purlins from the support beams can be divided from the beams they are supported by using the Split All Intersections Inclusion of purlins in the analysis system command.

  • The effects of incoming loads Purlin spacing can be reduced by reducing belt distances.

  • Steel belt tie cross-section size can be enlarged.

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Steel tie shear strength not satisfied.

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