Using Strut-&-Tie method on a circular cross-section

[x5bulldog]

ACI 318 chapter 11 shear design is a littler clearer for circular cross sections. Can anyone point me to the right direction if I wanted to design a circular cross section for shear using the Strut-and-Tie method.

 

[BAretired]

Why don't you illustrate the problem you are trying to solve?

BA

 

[x5bulldog]

Just A concrete pile fully embedded in the ground with a top lateral shear force acting with the top 6 inches of the pile. I am using a Pile Software which we are able to get lateral displacement graphs as wells as shear / moment diagrams and well as some other graphs and results.

The IBC has minimum tie spacing requirements I just wanted to compare the differencs between different types of tie spacing. What makes the Strut-&-Tie Model difficult is the circular cross-sectoin of the Pile and also the lateral resistance provided by the soil. Trying to see how to approach it.

 

[BAretired]

It would not have occurred to me to use a strut and tie model to solve that particular problem. If you do use it, why should the circular shape pose a problem? If the circular ties are adequately lapped, they are well anchored by the concrete and vertical reinforcement. The tie area is twice the area of the tie bar. The angle the strut makes with the axis of the pile is determined by the tie spacing and diameter.

If your program provides shear and moment diagrams, you already know the lateral resistance of the soil, so I fail to see the problem.



BA