Do you all consider temporary top strands in your design? I found that they effect camber and prestress losses, but would this effect be small enough to ignore? Also if I have a matt of WWR in the top flange, do I need to include this in my design for tension forces or would I leave it out? I am...
I am designing a hammer head pier using a 2D strut and tie model. I am using the linked example as a design guide and noticed they didn't include lateral loads in the STM. Is this just a simplified example? Do I need to transfer the longitudinal and transverse loads into the strut and tie model...
I am calculating the stiffness of the substructure elements and bearings to determine the thermal point of origin (TPO) on a continuous steel bridge. How do I determine which supports to make fixed supports? Is it just the support closest to the TPO? The supports to the left and right of the...
I'm looking for a program that will allow me to make the live load continuous, but the dead loads simply supported. So for I have tried LEAP Steel, MDX, & MIDAS. I also have access to LUSAS, but haven't used this program much. If I can't get one of these programs to work I may just end up using...
I'm designing a curved steel plate girder bridge that is continuous over the piers. I'm using MDX to model the bridge. I designed the flanges with varying widths and varying thicknesses between field splices. I did not specify any transverse stiffeners, but MDX defaults in the connection plates...
Can someone explain the difference between the pier cap types listed below and how the loads would be transferred for each?
1. Open pier cap
2. Pier cap w/ 1 or 2 rows of dowel bars going into a concrete diaphragm
3. Pier cap w/ stirrups extending from the pier cap into the concrete diaphragm...
I am designing a double angle connection between a floorbeam and a girder web on a bridge. The floorbeam is coped, has a 6.5" eccentricity to 15 bolts 3/4" A992 bolts spaced at 3", and has a load of 308 kips at the girder. I am having some trouble coming up with the required strength, T. Can I...
