frank28
Structural
- Jan 14, 2019
- 11
Hello guys,
I need a bit help with the steel beam to concrete connection design.
At the moment I am having a steel portal frame which standing on top of the precast concrete units with uncertain bearing capacities. I would like to avoid supporting that portal on precast concrete unit since the unit is a poorly condition, with uncertain bearing capacities and would like to use other element with much better and safer bearing capacities. Above the portal frame is pretty big concrete beam on which I could somehow support or hang my portal frame. Sizes of steel elements are small and overall horizontal force is 5,5 kN which can easily be accommodated by beam as I checked. The main problem is how to connect steel beam with the concrete. I do believe that precast unit can still accommodate some load but as I wrote before I would like to avoid that and im not counting on that.
How to connect those two elements? First thought was to put the steel plate on the underside of the rc beam and through the plate drill chemical anchors. The problem comes to the light at the moment when i have to decide what is the next. I was thinking about welding something, either angle or channel to steel plate, but welds in tension with no alternative way of load bearing doesn't seems very confident. Other thing with using channel or angle is connection with the beam, probably again with the bolts, in which case bolts are clashing with the beam flange. So I've come to a decision to to put an other UB profile on top of the existing, flange to flange, connect it with the bolts and on top the new UB weld steel plate and bolt it with chemical anchors to a concrete beam.
What you think about my thoughts? Do you have any wiser solution to this problem? Thank you in advance.
I need a bit help with the steel beam to concrete connection design.
At the moment I am having a steel portal frame which standing on top of the precast concrete units with uncertain bearing capacities. I would like to avoid supporting that portal on precast concrete unit since the unit is a poorly condition, with uncertain bearing capacities and would like to use other element with much better and safer bearing capacities. Above the portal frame is pretty big concrete beam on which I could somehow support or hang my portal frame. Sizes of steel elements are small and overall horizontal force is 5,5 kN which can easily be accommodated by beam as I checked. The main problem is how to connect steel beam with the concrete. I do believe that precast unit can still accommodate some load but as I wrote before I would like to avoid that and im not counting on that.
How to connect those two elements? First thought was to put the steel plate on the underside of the rc beam and through the plate drill chemical anchors. The problem comes to the light at the moment when i have to decide what is the next. I was thinking about welding something, either angle or channel to steel plate, but welds in tension with no alternative way of load bearing doesn't seems very confident. Other thing with using channel or angle is connection with the beam, probably again with the bolts, in which case bolts are clashing with the beam flange. So I've come to a decision to to put an other UB profile on top of the existing, flange to flange, connect it with the bolts and on top the new UB weld steel plate and bolt it with chemical anchors to a concrete beam.
What you think about my thoughts? Do you have any wiser solution to this problem? Thank you in advance.
