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About Saadat

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    Junior Member
  • Birthday 08/05/88

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  • Location
    Canberra, Australia
  • Occupation
    PhD Student
  • Expert in
    FEM Analysis
  1. Hi All, I am trying to check an existing result using of an I-cross-section subjected to combined axial compression and bending. According to the EN 1993-1-1 (2005) code it is required to check the cross-section's capacity to withstand combined effects of compression and bending first then move to member level. Formulations set out in section 6.2.9 of EN 1993-1-1 (2005). In equation 6.36 pp 54, procedure to calculate the reduced moment about y axis (MN,y,Rd) due to the effect of compression is provided. This equation is as following, MN,y,Rd=Mpl,y,Rd(1-(NEd/Npl)/(1-0.5*a) <= Mpl,y,Rd where, a = ((Gross Area) - 2*(section width)*(flange thickness))/(Gross Area) Normally for design purpose, it have to be NEd<Npl always. But for an existing result while checking if NEd>Npl the value of MN,y,Rd becomes negative which seems irrelevant. My question is how to sort this problem? Should I take ratio of NEd/Npl maximum equal to 1 or take the absolute value of the moment ignoring the negative? As the axial compression is very high the moment magnitude will be small. Any help would be highly appreciated. Thanks, Saadat
  2. Hi dik, Thanks for your comment, I am currently working with CUFSM. It's really a great tool to understand the buckling behaviour of cold-formed sections.
  3. Thanks dlnunes for your informative comment, This would be a great starting point for me. Recent research with cold formed members (C and Z for example) show they shows inelastic bending capacity. I am trying if I can compare the bending/LTB strength of these sections with the Test/FE. I will go through your suggestions and see what I can discover.
  4. Hi all, I was wondering if any one could suggest ways of calculating the critical moment for C-section and Z-sections according to Eurocode. Critical moment for a section at lateral-torsional buckling is perhaps indirectly suggested to obtain from NCCI document SN003a and SN002. However these documents provide solutions for doubly and singly symmetric I-sections. Again CTICM provide 2 software, (1) LTBeam and (2) LTBeamN. These got options to calculate Mcr for doubly and singly symmetric I-sections and T-sections. Still there are various type of sections available in the market for used as purlin and might be subjected to LTB? Any help would be great. Regards, Saadat
  5. Thank you Marios !
  6. Hi Everyone!! I am a PhD student. I am very happy to find and being able to join this group. Hope I will gain and share knowledge through this community. :) - Saadat