I am working on a project where another Engineer has designed a bridge girder (140ft span) as a structural steel vierendeel truss. Top and bottom chord are W12x252's. 5'-0" deep truss. The vertical webs are intermittently spaced lighter W12 members. The whole girder is then encased in concrete. 6ft deep by 2ft wide rectangle. There are no shear studs of any type so it's uncertain what kind of composite action their getting, if any out of the design. IMO the design is terrible and I have a whole list of items of why but what I need is third party documentation of why it's bad. I want to say it's an antiquated design but I'm not really sure if concrete encased structural steel was ever a thing in bridge or building design. It's just a really weird and inefficient design that is going to be a maintenance nightmare. I can't find anything in AASHTO that addresses this type of design which is an indicator that no one does this. Have you guys heard of anything like this? Any articles, documents, publications that would cover anything like this? I'll take anything at all. Even if it covers just concrete encased wide flange beam flexural elements.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Keeping our warfighters safe and delivering them a competitive advantage is a key goal of departments of defense around the world. Itâ€™s a goal shared by embedded computing manufacturers like Abaco: we never forget who we serve.This case study describes how a major international contractor integrated an Abaco single board computer at the heart of its CAS/CSAR solution. Download Now
This white paper shows how collaborative robots can play a role in helping companies succeed in the Covid-19 world: to help with social distancing, ramp up new lines quickly and reshore existing products due to interrupted supply chains. Real-world case studies are provided. Download Now
Rapidly explore innovative design options to reduce development time and expense, all within the Creo design environment. See how the Generative Topology Optimization extension automatically delivers high-quality, lower-cost, manufacturable designs. Download Now
PTC's Creo 7.0 has breakthrough innovations in the areas of generative design, real-time simulation, multibody design, additive manufacturing, and more! With Creo 7.0, you will be able to design the most innovative products faster than ever before, keeping you on the cutting edge of product design and ahead of your competition. Download Now