Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations KootK on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

feeling uneasy about steel beam 1

Status
Not open for further replies.
mats12

mats12

Geotechnical
Dec 17, 2016
181
steel_b_drzvty.png


Steel beam is HEB 300, span is 8 m,
There are timber beams on top of steel beam (cca 1,30 m spacing between them),
There will be live load on a roof (3 kN/m2),

I think I should weld vertical steel plates between flanges to make a beam more stiff - below every timber beam on bot sides of steel web.

Deflection is cca 1,5 cm, but i feel kinda uneasy about the whole thing. 8 m seems a lot.
Does vertical steel plates lower deflection of a beam too? or is their main function to prevent beam from turning over and for vertical reinforcement of the beam web?

Stresses in the beam are OK so bearing capacities are alright.

Is there anything I should be careful about.
 
Replies continue below

Recommended for you

Sort by date Sort by votes
Your biggest issue is torsion on the beam due to the eccentric load. Can you add some length to your timber members so they bear the full width of the beam? Vertical stiffeners do not help deflection and are likely not needed. FYI, your shear and bending moment diagrams are upside down.
 
Upvote 0 Downvote
Can you add some length to your timber members so they bear the full width of the beam?

Yes, I will do that. As far as deflection vibration goes... is this system alright?
 
Upvote 0 Downvote
I don't know what "cca" deflection means but if the total load deflection is 1.5 cm (L/533) then you should be fine for most cases.
You might want to get your supervisor to review your final design.
 
Upvote 0 Downvote
Understand stresses and deflection are acceptable.

Without switching to english units, have you checked for Lateral Torsional Buckling Failures? This could govern in long span, slender beams

Are your steel beam supports and timber connections sufficient to prevent the compression flange from buckling. This failure mode in I-beams can govern before reaching yield/plastic moment capacity.

Jeff
Pipe Stress Analysis Engineer
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

M
  • Question
About steel beam and shear wall combinations in high-rise buildings
Replies
5
Views
2K
human909
human909
greznik91
  • Question
RC beam horizontally supported by the steel beam?
Replies
2
Views
253
KootK
KootK
JStructsteel
  • Question
Steel beam web infill with wood
Replies
9
Views
3K
jerseyshore
jerseyshore
kunfukenny
  • Locked
  • Question
Question about beam-column connection detail.
Replies
1
Views
107
BIM there done that
BIM there done that
SteelPE
  • Question
Steel Composite Beam and Deck Cold Joint
Replies
10
Views
211
JLNJ
JLNJ

Part and Inventory Search

Sponsor

Back
Top Bottom