I have placed a few exploratory calls to contractors who install drilled shaft foundations, but I don't have any personal contacts with them and haven't received any info back yet, so I thought someone in the forums might be able to help.
I'm investigating overhead clearances required to...
Please give me your opinions on what exactly is going on with the following situation:
- short simple span bridge
- two concrete slab girders side by side
- bearing at each end on one or more elastomeric pads
- no positive connection holding the girder down
to the substructure (gravity...
I am trying to develop a list of all the potential ways/reasons a prestressed concrete girder could fail.
For example:
inadequate concrete strength
inadequate flexural capacity
overload
uneven bearing support
loss of prestress force due to corrosion of strands
loss of prestress force due to...
(I originally posted this in the steel coatings forum, but with no response - so, I am trying this forum since it is active. Thanks in advance.)
I am seeking opinions and/or recommended sources of information on the following:
What would be the best method to protect steel from corrosion when...
Is it possible to gain 4000 psi (full design strength) from normally cured (wet or membrane cure) concrete in 24 hours? How practical is this? expensive? What effect might this have on the durability of the concrete (if any)?
Several methods and products are available for obtaining high early...
Is it possible to gain 4000 psi (full design strength) from normally cured (wet or membrane cure) concrete in 24 hours? How practical is this? expensive? What effect might this have on the durability of the concrete (if any)?
Several methods and products are available for obtaining high early...
I have developed several spreadsheets to calculate loads and geometry for application to a structural model (say a bridge pier). I then take these results and input them (manually) into a structural analysis software (say STAAD), run the analysis and obtain an output file. Many times, I have...
I am seeking opinions and/or recommended sources of information on the following:
What would be the best method to protect steel from corrosion when it is buried in soil in a location where both moisture and oxygen would be available to promote the corrosion? For the sake of making a...
I was just interested in how other engineers might determine the loads on a wingwall retaining wall shaped as shown below. I believe that the way I did it was fairly conservative, but would like to hear ideas from people just looking at it for the first time. The wingwall is parallel to a...
Can anyone give me direction to a source on uses of galvanized steel in concrete? I know some work had been done evaluating galvanized rebar vs epoxy coated rebar, but I cannot seem to locate information on those results. Seems to me with the widespread use of epoxy coated bars that something...
