xxpegasus11
Structural
- Nov 29, 2004
- 48
I am looking to strengthen an existing I section steel beam 10m long to carry a new additional load. Welding is not an option and the top of the flange is also inaccessible. Also depth that can be added below bottom flange is limited.
My thinking at the moment is for a C section bolted to underside of bottom flange, with C section flanges upright and work on increased z for increased moment needed, curtailing past point of reinfoncement required. Bolting worked out on shear flow etc. Any comments or points to be considered appreciated.
Builder suggests bolting two c sections, either side of web, at centre. My theory must be rusty and its been a while since i dealt with a lot of steel connections and I guess I keep thinking back to flanges carrying moments and webs carrying shear. The way I see it is that no shear flow at centre of web, so how is the composite action made?
My thinking at the moment is for a C section bolted to underside of bottom flange, with C section flanges upright and work on increased z for increased moment needed, curtailing past point of reinfoncement required. Bolting worked out on shear flow etc. Any comments or points to be considered appreciated.
Builder suggests bolting two c sections, either side of web, at centre. My theory must be rusty and its been a while since i dealt with a lot of steel connections and I guess I keep thinking back to flanges carrying moments and webs carrying shear. The way I see it is that no shear flow at centre of web, so how is the composite action made?