alighalib
Civil/Environmental
- Jul 27, 2001
- 2
Hi
A composite box girder bridge is composed of a an open steel box girder attached to a top concrete deck. The open steel box girder is made of two 4 ft deep by 1/2 in thick web plates welded to a common bottom flange plate (3ft wide by 1/2 in thick) and two top plates one for each web (1 ft wide by 1/2 in thick). An 8 inch thick concrete slab is attached to the top box flanges through shear connnectors, so that the two systems (slab and box) acts compositely.
I am modeling the system as a 3D flat plates with 5 DOF. In order to preserve the composite section properties of the deck-box system, I hadto offset the deck elements to the mid-plane of the concrete deck, i.e. 1/2 the slab thickness above the steel girder top flange, and then I had to connect the opposite nodal points of both steel top flanges and concrete deck with rigid links.
Is there a better way of doing this. I am using STAAD-PRO.
Regards![[peace]](/data/assets/smilies/peace.gif "[peace] [peace]")
A composite box girder bridge is composed of a an open steel box girder attached to a top concrete deck. The open steel box girder is made of two 4 ft deep by 1/2 in thick web plates welded to a common bottom flange plate (3ft wide by 1/2 in thick) and two top plates one for each web (1 ft wide by 1/2 in thick). An 8 inch thick concrete slab is attached to the top box flanges through shear connnectors, so that the two systems (slab and box) acts compositely.
I am modeling the system as a 3D flat plates with 5 DOF. In order to preserve the composite section properties of the deck-box system, I hadto offset the deck elements to the mid-plane of the concrete deck, i.e. 1/2 the slab thickness above the steel girder top flange, and then I had to connect the opposite nodal points of both steel top flanges and concrete deck with rigid links.
Is there a better way of doing this. I am using STAAD-PRO.
Regards