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.
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. Download Now
Simcenter STAR-CCM+ makes simulation accessible to process engineers with limited simulation experience but strong process knowledge. This flood of knowledge and skills will make the industry more cost efficient, less polluting and ultimately more innovative. Download Now
The need to reduce exploration and development costs has never been more important to the future of the oil and gas industry. In this special report we present how engineers and scientists from leading oil and gas companies are deploying Siemensâ€™ simulation software in the design and operation of a range of oil and gas products and systems. Download Now