Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

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

T-Bracket Beam Analysis 1

E-N-E ENG

Mechanical
Joined
Oct 29, 2020
Messages
16
Location
US
What's the pull force on the top bolt in terms of the point load, F?

Need to determine the pull force on the top bolt to find the pre-load (T = k x F x d --> F = T / (k x d)) to ensure no separation.

Thank you folks!IMG_2117.jpg
 

Attachments

  • IMG_2117.jpg
    IMG_2117.jpg
    45.8 KB · Views: 3
You may look to AISC Design Guide 1 Base Plate and Anchor Rod Design.
Assuming the base plate is rectangular or square , pull force P would be approximately P=8F/6= 1.33F.
Don't pull too much the concrete may break out. ( check probable failure modes).
 
You may look to AISC Design Guide 1 Base Plate and Anchor Rod Design.
Assuming the base plate is rectangular or square , pull force P would be approximately P=8F/6= 1.33F.
Don't pull too much the concrete may break out. ( check probable failure modes).
My guess is there is no concrete involved here.
 
You may look to AISC Design Guide 1 Base Plate and Anchor Rod Design.
Assuming the base plate is rectangular or square , pull force P would be approximately P=8F/6= 1.33F.
Don't pull too much the concrete may break out. ( check probable failure modes).
[Moment load F x 8] / [distance from top bolt to bottom bolt 6] = 8F/6 = 4F/3

Correct explanation?

Thank you
 
Folks... trying to analyze this further:

At interface 1 - plate to SEPARATE (BOLT 1 IN TENSIONS)
At interface 2 - plate to COMPRESS (BOLT 2 IN MOMENT ??)

Is the BOLT 2 under MOMENT load (top half in tensions and bottom half in compression)?

Thank you

IMG_2126.jpg
 
8 x F = (1x edge + 2 + 4) x T1 + (1x edge) x T2
T1 / T2 = (4 + 2 + edge) / edge (ratio of distances from free edge contact point)
T1 = tension load at bolt 1
T2 = tension load at bolt 2
edge = bolt edge distance
Take moments at bolt 2 free edge contact point
 
Last edited:

Part and Inventory Search

Sponsor

Back
Top