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A co-worker has asked me to help him investigate the properties of a steel fiber reinforced concrete foundation. We're looking for how it affects f'c, (phi)Vc, and how it compares to rebar reinforced foundations. All we were able to find online were research papers that had no difinitive...

Thanks, meicz, I knew this one was going to be over my head. PanamaStrEng: Only the steel beam is connected to columns with moment connections, and the slab is only composite with the beam. Thanks!

I need some help with a composite beam that has moment connections. The examples in the ASD manual calculate deflection of a composite section as ML^2/161I, but their example follows a beam with a pinned connection. Do the steel beam connections themselves play a part in the derivation of this...

I was asked to research the following: Is it ok to embed a grounding wire through concrete without some separation between the 2 materials? Will the concrete get damaged? I have my own barely educated opinion about this, but I need someone with thorough knowledge of the subject to let me know...

A co-worker came to ask me if I knew the equation to convert a Vertical Dashpot Constant (2.793x10^6 lb-s/in) and Horizontal Dashpot Constant (1.626x10^3 lb-s/in) to % Critical Damping. Any help on this would be great, I've only ever seen damping as a percentage... then again I haven't been in...

A co-worker came to ask me if I knew the equation to convert a Vertial Dashpot Constant (2.793x10^6 lb-s/in) and Horizontal Dashpot Constant (1.626x10^3 lb-s/in) to % Critical Damping. Any help on this would be great, I've only ever seen damping as a percentage... then again I haven't been in...