1 / 7

Joist Explore and Report

Joist Explore and Report. nominal dimensions 8x2x0.5 t=0.054 straight corner model. cont. Team Exercises. Group 1:Team Lip Examine the influence of changing the lip length or lip geometry on the elastic buckling (M cr ), and (if time) the DSM strength – share then report.

noble-parker
Download Presentation

Joist Explore and Report

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Joist Explore and Report nominal dimensions 8x2x0.5 t=0.054 straight corner model

  2. cont.

  3. Team Exercises Group 1:Team Lip Examine the influence of changing the lip length or lip geometry on the elastic buckling (Mcr), and (if time) the DSM strength – share then report Group 2: Team Flange Examine the influence of changing the flange width or geometry on the elastic buckling (Mcr), and (if time) the DSM strength – share then report Group 3: Team Supports Examine the influence of adding springs or supports at different appropriate locations in the section on the elastic buckling (Mcr) and (if time) the DSM strength – share then report Group 4: Team Stiffener Examine the influence of adding folded stiffeners at different appropriate locations in the section on the elastic buckling (Mcr) and (if time) the DSM strength – share then report

  4. Group 1: Team Lip • Varied lip length 0.3-2 in., tried return, and 45 • Lip length not local buckling, unless really long • Inc. lip length = inc. dist. Buckling • Lip not controlling allowables on this particular section (800S200-54), even HDS style lip not a big improvement • Did not try thickening the lip… • Cost analysis….

  5. Group 2: Team Flange • Tried bigger flange ( 3 in.).. • 12% increase in capacity • Tried single V in the middle of the 2 in. flange • 17.9% increase in capacity! • Tried other cases in the flange.. Single V was the winner in these trials

  6. Group 3: Team Supports • Put springs on top and bottom flanges, distortional goes up 1.21 • Two spring on top flange up to 1.31 (DB) • Springs on web.. Local went way up! (DB?) • Looked at other locations

  7. Group 4: Team Stiffener • Ribs and V’s in the flange, also looked at stiffening lip, also looked at planking (ribs) in the web • Double planking in the web, with returns, 18% increase in the moment capacity • Flange and lip help DB, but needed something in the web to get a big boost…

More Related