Jump to content

Leaderboard

Popular Content

Showing content with the highest reputation on 10/30/13 in all areas

  1. Attached are two docs I got from Google; they are lucid and easy to understand and cover examples. Pile Groups (Literature).pdf, Pile_Foundation_Design.pdf With Dynamic loading, the question is not about piles designing only, but in fact, you need to design a foundation system and satisfy vibration limits for the machine. I can share with you typical rule of thumbs for dynamic design of machine foundations. Keep me posted on this as this is my specialty in structures. 1) Your utilization for piles should not exceed 45 - 55 % of capacity under static loading. This is to ensure that soil remains fairly elastic and expected behavior is achieved. 2) Is the boiler centrifugal or reciprocating machine ? You can check ACI - 351 that talks about minimum ratios of foundation weights to machine operating and their CG Locations for both centrifugal and reciprocating machines. 3) Your center of resistance for pile group should be with in 6-7% of machine C.G. 4) What is the max vibration limit for the boiler on the foundation level and at the machine CG level ? You normally get this information from the vendor and you proportion your foundation to satisfy those limits. 5) I am interested in knowing that how would you do a dynamic analysis for the system ? 6) You need to have complete soil investigation report with SCPT test providing shear wave velocities in each soil layer. 7) Is the foundation system an elevated one or is at ground level ? It is important to know this as table top machine design needs more engineering input and caution ? 8) What is your acceptable Human Perception Limit for the system ? 9) Is the foundation system being shared by super structure too. Please provide foundation plan. I want to see what is around your boiler. 10) You response of foundation should be outside the operating range of the machine to avoid resonance. (V.Imp) 11) Please reply asap . Thanks.
    4 points
  2. My PMP certification cycle was going to expire recently. I tried to search the way in which we can earn free PDUs online, with out undergoing through any formal or informal training and wasting money. 1. Claim 15 PDU for doing a Project Management related job for a period of 3 years. 2. Read 2 Books and earn PDUs. There is a variety of books available online on open source forums hence they really dont conflict with Professional responsibilities and ethics concepts of PMI. 3. Claim remaining PDUs by watching free PDU. A five minute google search can yield millions of such PDU. If you find some good tips do share with us on this forum. Best Regards Uzair Ashraf
    2 points
  3. Thanks for the check list Muhammad. Though its quite optimistic and very brief, i liked this list and found it really useful. I believe that a Project is constructed thrice, once in minds, then in Papers followed by real construction. Fortunately, this list covers all stages of a Project.
    2 points
  4. I think we are discussing Point 15 here from our employees perspective. thats why our expectations are pretty much higher. If you are in employers shoes, your approach will absolutely different.
    1 point
  5. im getting interest too in this now, specially in dynamics! keep us updated!
    1 point
  6. Plz find the Attachment 111787340-ETABS-Example-RC-Building-With-Shear-Wall.pdf
    1 point
  7. Shear walls are defined as a Walls. you can go to Define > wall/slab/deck section > wall section i have attached the tutorial of 5 storey building ,you can find the Design of shear wall on page 41 and onwards. its simple and it is defined in the same way like any other member e.g slab or columns etc. help yourself
    1 point
  8. Vertical resistance of piles will depend on soil conditions; insure enough skin friction, or bearing capacity at bottom of pile according to external vertical forces. In case of machine loading, you will also need to provide for ability to shear and bending stresses. Check for punching shear in pile cap. Check out this book for guidance. https://www.dropbox.com/s/v5ffxjcq4jyqcpt/Pile%20Foundation%20Analysis%20and%20Design_H%5B1%5D.%20G.%20Poulos%20%26%20E.%20H.%20Davis_1980.pdf
    1 point
  9. 1 point
This leaderboard is set to Edmonton/GMT-06:00
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.