Topic: Modelling Bolt Connection in Reinforced Concrete Slab
I am modelling reinforced concrete slab supported at four-corners on steel plates (200x200 mm). Steel plate is connected with the slab through M20 bolt. To connect the bolt a special assembly has been placed inside concrete during casting.
I modeled the bolt using vertical spring at joint (at exact location of bolt) with z-direction fixed. I have applied boundary conditions on the steel plate with x and y-directions fixed.
The model ran, but I found the deflection is too low and slab failed much before the yielding of tensile steel.
My understanding, I could not model the bolt connections.
1. Do I need to build a physical bolt as a macro element (ABAQUS has this option)? If yes, how and what should be its material model?
2. Instead of using physical bolt what other options I have?
I can send the model for your review.