Shear friction - shear in two directions

[smvk3]

When calculating the shear friction demand for an interface with shear both parallel and perpendicular to the shear plane, do you just take the resultant of the two forces ( sqrt(Vperpendicular^2 + Vparallel^2) ) and use that value to calculate the required area of the steel?

 

[KootK]

I'm actually surprised that it took so much research to determine that the ratio of embedment length to tension/compression eccentricity is the parameter of interest. To me, that just seems like straight up strut and tie business. The ratio just amounts to the angle of the compression strut. I think this ties in with TX's perspective.

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

 

[CELinOttawa]

Keep in mind that the paper is 20+ years old and the Jirsa & Johnson work is going on thirty years... Strut and Tie may be one of the very first concrete design methods, but it was basically dead from 1920 to 1980. You and I learnt strut and tie in Uni; The authors were just figuring out the details in the 80s.

 

[rb1957]

"age shall not weary them, nor the years condemn" ... old references are not invalidated 'cause they're old, but they can be superceded by later testing/analysis/understanding.

Quando Omni Flunkus Moritati

 

[CELinOttawa]

RB: I quoted from the older reference because I see the value in it... My comment on age was only because Kootk expressed surprise that the answer found required research. What we get taught often seems obvious, but needed someone to figure it out first.

One of my favourite references is Ketchum! lol...