How to Calculate strength of embedded beams
How to Calculate strength of embedded beams
(OP)
Hi All :
I need to calculate the strength of a W 8 X 24 beam embedded in the concrete of 8" and which is 240" long .How should I proceed to solve this problem. Is there any reference to which I can look into which talks about the strength of embedded beams ?
Basically, the reason why I need this is because I am currently working on a project where I have designed a test fixture for doors. The base of the test fixture will be welded on to the W 8 X 24 beam embedded in the concrete. FE Analysis predicts that the test fixture will be pulling up the embedded beam with a force of 20,000 lbf .
Is the embedded beam able to resist that force without any failure to concrete/beam ?
Your suggestions and help in answering this question is highly appreciated.
Thanks,
Kapil
Structural Engineer, EWI
I need to calculate the strength of a W 8 X 24 beam embedded in the concrete of 8" and which is 240" long .How should I proceed to solve this problem. Is there any reference to which I can look into which talks about the strength of embedded beams ?
Basically, the reason why I need this is because I am currently working on a project where I have designed a test fixture for doors. The base of the test fixture will be welded on to the W 8 X 24 beam embedded in the concrete. FE Analysis predicts that the test fixture will be pulling up the embedded beam with a force of 20,000 lbf .
Is the embedded beam able to resist that force without any failure to concrete/beam ?
Your suggestions and help in answering this question is highly appreciated.
Thanks,
Kapil
Structural Engineer, EWI






RE: How to Calculate strength of embedded beams
I attach a rendition of a Mathcad worksheet I made on this; I plan to add the worksheet itself with many others of the LRFD 1993 this weekend to AISC's SteelTOOLS.org site
RE: How to Calculate strength of embedded beams
Just to clarify, the W 8 X 24 beam is not a column, but a beam laid horizontally on the ground and has an 8" concrete all around it. I hope it clear doubts regarding my previious post.
Thanks,
Kapil
Structural Engineer, EWI
RE: How to Calculate strength of embedded beams
RE: How to Calculate strength of embedded beams
Sorry to bother again, but when I checked the reference for encased beam, they say that in order to assume a beam without shear studs to act as a composite beam, the top of the beam should be atleast 1.5" below the top slab. However, for my case, the top of the surface of the beam is visible and therefore, it is 0".
RE: How to Calculate strength of embedded beams
A conservative approach would be to design the concrete beam to carry the entire moment, taking care to provide ties each side of the concentrated load adequate to transfer the load into the compression face of the concrete.
BA
RE: How to Calculate strength of embedded beams
In any case, you can proceed as BAretired says or if not counting the shape strength is not acceptable devise a way of combining the extant strengths in such way that there is compatibility of deformations. To ensure that you will have to ascertain as best as you can the stresses at the interface between steel and concrete; this is simple for some cases, say a shape being pulled out of a footing, or sharing straight bending action in the whole of both steel and concrete, both taking its share; but for more complex situations and sets of hypotheses it can become unpractical.
So maybe looking for alternatives maybe positive for these cases.
RE: How to Calculate strength of embedded beams
Timing has a lot to do with the outcome of a rain dance.
RE: How to Calculate strength of embedded beams
Can it carry any load. How to do those calcs ?
RE: How to Calculate strength of embedded beams
RE: How to Calculate strength of embedded beams
BA
RE: How to Calculate strength of embedded beams