I was hired to perform a structural evaluation of the existing construction on a 6 building condo development. the development is a subgrade garage with concrete columns and PT slab above supporting up to two stories of wood framed construction. Originally it was only the distress report, but as my investigation revealed considerable construction defects, the owner then asked me to perform structural calculations on the existing structures to verify they were engineered correctly. Everything was OK, until I got to investigating the punching shear capacity of the PT slab at the columns. I hadn't noticed it before, but the concrete columns supporting the PT slab were only 12" square....with NO drop caps. As a result the punching shear force is about 35% higher than the punching shear capacity. Now my question, I need to attach a drop cap to the concrete column, but am unsure of the best way. With the connection force being around 70k on some columns, I don't think I can attach the retrofitted drop cap to the concrete column without a million bolts. I was thinking of fabricating bent plates that would sandwich around the concrete columns and then welding them together, thus providing a direct path to the foundation. I would like to hear if anyone else has any better/more cost effective ideas. I was looking into FRP, but couldn't find any examples of FRP and attaching drop caps on the internet.
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.
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so itâ€™s critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Download Now
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now