Shear Connectors (Insulation Wall Panels) 1

[JohnRwals]

Hello!

Shear ties are used for composite action in tilt-up and precast concrete sandwich walls.
Dr. Naito's paper shows many shear ties in the market.
Two of them are actually masonry joint reinforcement, truss mesh and ladder mesh.
Are these meshes really used as a shear tie?
Is there any paper/info referring to the market share of respective shear ties?

Thanks for your interest!

JRW

 

[HTURKAK]

Some of them (type A,F,G and I ) are similar to the shear, restrain ties and supporting anchors used in my previous projects.

I have attached the catalog of HALFEN which is a famous supplier for info.

 

[Brad805]

A. Dayton Superior. Non-composite.
B. Thermomass CC connector. Composite. We use a ton of those. Leviat owns Thermomass now.
C Thermomass SC or MC. Non-composite.
D. Thinwall. Very high composite action, but your supplier choice is limited due to their licensing.
E/F. Composite pin. Tons of those on the market. Meh.
G.H.I Varying level of composite action. Not super common from what I know. Meh.
J. Meadow Burke makes those and you will find useful info in their tech manual. These are composite. When you look at the thermal imaging with these you will find they are not wonderful.
L. Not familiar with those, but I would doubt they develop much composite action.

You are missing a couple others.
M. Hughes Brothers Alsan Nu-Tie. They have done a lot of research. Alsan Nu Tie
N. ICONX is new, but I have met them and they are very helpful. ICON X Great product in my view for site cast projects.
O. HK Ties. I am not overly familiar with these. HK Ties
P. Sigma G. I am not familiar with these either. Link

If you are in the US or Canada, Halfen deliveries are not great. We were quoted 8wks for some parts a few weeks back.

You can find many push off tests for many of the different composite connectors. Thermomass is quite protective of their data and we had to sign an agreement before we could get their testing.

I would look for papers by Edward Losch, SE, PHd and Kim Seeber, SE. They have both done a lot of research in this field. If you are designing sandwich panels you would want to look at LECWall by Losch Software.

 

[JohnRwals]

Thank you very much for your comments!
Brad805 was right.

I wonder why/how two masonry joint reinforcements (K and L) can be used for sandwich walls.
(Side effect? Or, diverse application?)
Generally J's wires are thicker/stronger than K's.
That's why Dr. Naito's test results show J is better than K.
I guess K for masonry is more popular than K in the market.
So, K is cheaper than J.
If K can be placed discreetly, do you think it can be applicable to sandwich walls?

JWR

 

[dik]

I'd stay away from the masonry ladder mesh... but the truss mesh could work. A, B (if flat BAR), D, F, and J look to be appropriate.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[dik]

I think K could work... if I recall, masonry truss mesh uses a very high strength steel and the welds to the outer bars has high resistance. Definitely not L.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[Brad805]

Keep in mind you have insulation between the two skins that has some strength. There have been some tests to determine how much it participates in the overall composite action. It is not a lot, and most neglect it, but some will use a small amount of composite action for the handling load cases. In many designs, handling loads govern and once the panels are in place the structural wythe will do all the work.

 

[dold]

I've seen type J/K from a local supplier when they came to give us a sales pitch. Other than 'I saw it once', I don't know anything about them.

[URL unfurl="true"]https://www.innstruct.com/engineering-details.html[/url]