Recent content by bruinboy

dicksewerrat...I'm not familiar with DOT sites...could you lead me in the right direction?

This may be a dumb question, but I'm wondering how you would design a concrete cantilever retaining wall (i.e. size the steel and the width). The wall is 12' high and about 25' long. Do I just take 1 foot sections and model them like beam-columns? Thanks in advance.

We've got an existing residence (one-story) with a pier and grade beam foundation. The existing piers are shallow. The house was built on fill and is sliding a bit so we are going to use drilled piers adjacent to the exterior grade beams that will extend down into bedrock. I'm looking for...

shepherd, thanks for the info. I can't use x-bracing because it would run straight through the parking areas. By inverted pendulum system, are you saying that I can just leave the connection as pinned at the top of the column and assume that it acts like a cantilever instead of acting as a frame?

I am trying to analyze an existing carport that uses CEE sections (8" x 2-1/4", 14 gauge) as columns and a beam of a frame. The height is about 8' and the frame width is 10'. The columns are embedded in concrete. The beam is connected to the side of the columns with screws (no moment is...

dbuzz, I was wondering if you could provide a link to Concrete April 2003...can't seem to find it. Ron, bond strength equals 10% of tensile strength of CONCRETE?

I'm doing an analysis of an existing free-standing carport structure. The designer used 2-8"x2 1/4"x 14GA. CEE's as columns supporting a shallow slope roof. The wind uplift load will be very large and I'm concerned that the way he attached the columns won't provide enough strength. He...

I'm trying to size the steel for a concrete soldier pile and was wondering how I model the beam when determining the point of zero shear. I modeled it as a cantilever beam, with the very end of the pile embedded in bedrock considered fixed. Then I found the point of zero shear by summing the...

Hi, I'm having trouble figuring out how to develop the moment and shear diagrams for this beam configuration I am working on. I have a continuous GluLam beam over 3 unequal spans. The two outer spans are 9' long and the middle span is 24.5' long. There is a uniformly distributed dead and live...

Hey everyone, Thanks for the help...I pinned the bases and now have no moment to deal with.

Hi, I'm trying to design the column base plate for a residential moment frame. The foundation is an 8" by 29" grade beam with 3-#5's top and bottom on piers. The column is subjected to a 13 kip axial force and a 17 kip moment which seems to have a pretty high eccentricity of 15 inches (this is...

Dawn, I can't use a braced system as a large window is in the way. But I can model an ordinary moment frame as pinned instead of fixed at the base?

Lutfi, So you are saying to just model the frame as pinned instead of fixed and I'll get a larger axial but no moment to deal with? Am I understanding this right?

Moment is in the same direction as the continuous grade beam runs. No torsion involved.

Hi, I'm trying to design the column base plate for a residential moment frame. The foundation is an 8" by 29" grade beam with 3-#5's top and bottom on piers. The column is subjected to a 13 kip axial force and a 17 kip moment which seems to have a pretty high eccentricity of 15 inches (this is...