What are some examples of shear compression and shear tension?

[bojoka4052]

I know what shear is, I know what tension and compression is, but I dont understand what shear compression and shear tension means? Is this simply when shear causes either compression or tension in the member?

Example of shear tension?

Example of shear compression?

 

[milkshakelake]

I never heard of those terms. Could it just mean a member that's simultaneously in shear and tension/compression? Like a moment frame.

Could it also be shear that's pulling a web apart instead of compressing it? I can see that happening with a hung beam, possibly with flanges subjected to prying action. That would be like your first diagram. For steel, it would just go through the regular code checks for shear except for web crippling provisions based on buckling.

In either case, the phenomenon definitely exists.

 

[rb1957]

is it shear in a flat plate ? causing tension and compression (at 45deg) ?

"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.

 

[dik]

Could shear tension and compression be the tensile and compressive components of the shear. On a square shaped element, for example the shear on the right and on the top are pointing up and to the right, respectively. The shear on the bottom and on the left are pointing to the left and down, respectively... this gives rise to a tensile force on the element and a compressive force on the element. Is that the answer?

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[rowingengineer]

I have heard this a lot in cold formed design, basically the shear buckling is restrained somewhat by the tension effects.

 

[centondollar]

What your pictures describe is point loading at a location which is restrained from displacement in the direction of loading. An example of such a structure is the cross-section of a steel bridge girder at the supports. Stiffener plates are added to the cross-section in order to transfer the support reaction or concentrated point loads (which you call "shear compression" for some reason) into the girder web. The stiffener plates make the cross-section a rigid diaphragm which increases shear buckling capacity, flange local buckling capacity and ensures that flanges and the web have a smooth transfer of bending and shear stresses.