CISC Research Grant Suggestions

[jayrod12]

Hey All,

CISC has asked our firm (and many other I'm assuming) to send them some suggestions for research. They will provide grants to students who choose to research CISC's approved topics.

Since some of you have not received this request I am putting the question out for you to have your input. What research would you like to be performed in steel structures?

Some examples of the already approved topics are
[ul]
[li]Connections subject to combined shear and tension[/li]
[li]Effective weld properties for connections of round hss[/li]
[li]embedded steel brackets for cladding connections[/li]
[li]ASTM A1085 characterization[/li]
[li]Eliminating gusset plates in truss connections[/li]
[li]Slotted HSS brace connections for MD and LD CBF using channel stub for field-bolting[/li]
[li]Moment connections between wide flange beams and hss columns[/li]
[/ul]

I look forward to any input from the knowledgeable members

 

[jayrod12]

I'm surprised no one sent a single response.

I would think that given the experience on this board there would be topics where you would want more research to be completed.

 

[Archie264]

Perhaps folks are scared to suggest something that might end up making the next edition of the steel manual half an inch thicker?

 

[jayrod12]

Haha, I think you are on to something.

and perhaps they, like me, feel their suggestions may be too rudimentary (or too complex).

 

[KootK]

I would like to know more about the residual stresses that develop in a cross section as a result of welding. I've always worried that inelastic buckling might be adversely affected somehow as the design checks assume a particular baked in residual stress pattern.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[jayrod12]

Thanks Kootk, I figured you'd have at least one, if not more..

 

[KootK]

No worries. The reason that I've been slow to respond is that I don't really know much about where the frontiers of steel research are at these days. That, and my main interest with steel revolves around base plate anchorage which folks are surely sick of hearing about, especially from me.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[dcarr82775]

Koots slow response is due to the fact that shear friction doesn't apply

 

[KootK]

Precisely Dcarr. If CISC would just man up and take a stab at shear friction, I'd be all over it. There's steel involved.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[KootK]

I'd also like to know more about partially galvanized framing assemblies that straddles an interior / exterior boundary. How far does one have to take the galvanizing for one to consider the exterior members adequately protected and not electrochemically compromised by the interior, non-galvanized members?

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[jayrod12]

Also a good one.

I somehow doubt CISC would give money to someone researching a concrete topic (baseplate anchorage and shear friction) but it never hurts to ask.

 

[jayrod12]

BTW Koot, in your first topic I'm assuming you're talking about the welding of miscellaneous steel (angles, joist seats, etc) to rolled sections (beams and columns) correct? Would you include cap and baseplate welding in your request?

 

[KootK]

Two situations came to mind:

1) Misc stuff like you mentioned.
2) Built up sections.

Cap and base plates concern me less because of where they end up along the length of a compression member.

While I brought up the shear friction thing facetiously, I've always thought that composite steel design and concrete shear friction should be unified somehow in terms of the results and methods.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[dhengr]

KootK:
Just eliminate the shear studs, weld the conc. slab to each top flange tip, and call it shear flow. They’re working on a compatible welding rod and process right now. That’s some of the latest research being done. But, we aren’t sure who’s doing it becuase there is a bit of a turf war going on btwn. the conc. people and the stl. people about who will get to control and write those 800 pages for the next edition of the codes.

 

[KootK]

Speaking of composite shear flow... there's this: Link

If someone would only research that for me, I'd be so grateful that I'd consider engaging in the kind of shower mischief that results in significant partition loads.

Sadly, that topic has no practical value and is of little interest to anyone other than myself.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[KootK]

Have we Canadians sorted our steel fire rating issues yet? Last I checked, we're still stuck having to down-factor our capacities based on ULI fire ratings that apparently don't suit limit states design. Somebody should really sort that out it it hasn't been done already.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[KootK]

Somebody posted recently about steel base plates. They linked to a nifty presentation where the presenter demonstrated, using FEM, that most of what we assume doesn't pass muster and can lead to very non-conservative results. I'd love to see some research either support or refute those FEM conclusions. That should fall within the steel people's wheelhouse I would think.

The greatest trick that bond stress ever pulled was convincing the world it didn't exist.

 

[wannabeSE]

jayrod,

Study the ultimate strength and serviceability (deflection) of beams that have been reinforced while loaded. Often times it is not economical to shore beams when adding cover plates or other steel to increase the beam's capacity. Strength design suggests that the order of loading does not matter. The capacity of the beams is determined by the final section properties. A study to confirm or deny this theory would be nice along with clear recommendations for design including consideration for deflection. I would prefer the study to focus on composite beams.

 

[jayrod12]

Thanks wannabeSE that is a great topic.

 

[BUGGAR]

Just what we need. AISC Appendix D for baseplates!