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  1. tmgczb

    ASCE 41180 Stair Wind Calculation

    As shown in the picture, the green line marks: Does it mean: For side elevation, consider "handrail area+stringer section", but how many stringers need to be counted? All or only the one in the front? For end elevation, consider "50% of stair flight gross area" not "50% gross area of staircase"...
  2. tmgczb

    Bolt Thread

    In recent design, ratio for 1 vertical brace connection for TEEUB146 section reached 0.89(<0.85 required, otherwise perform separate check, maximum separate check ratio<1). This is a truss member. The capacity given in standard drawing is 246kN and actual tension is 220kN. In RAM, the separate...
  3. tmgczb

    Soil Pressure for Dyke Wall Calculation

    I understand. It just likes put a box of water there, with the same effect of surcharge load, especially when there is HDPE membrane used.
  4. tmgczb

    Soil Pressure for Dyke Wall Calculation

    At underground level, shall K be considered for liquid pressure? Should it be distinguished into with HDPE membrane and without HDPE membrane?
  5. tmgczb

    Foundation Eccentricity for Single-Side Cantilever Parking Shelter

    Does these PDF come from AI？
  6. tmgczb

    Foundation Eccentricity for Single-Side Cantilever Parking Shelter

    In desert regions, where wind is heavy, is wind uplift case is more critical for membrane structure?
  7. tmgczb

    Foundation Eccentricity for Single-Side Cantilever Parking Shelter

    As shown in the picture, footing eccentricity towards left side or right side is more favorable?
  8. tmgczb

    Friction Coefficient Between Backfilling Soil and Soil base

    In this way punching shear here is not what we check for depth of footing.
  9. tmgczb

    Friction Coefficient Between Backfilling Soil and Soil base

    I will read. Last night, I went on the next paragraph. It says that punching shear, edge shear and base shear need to be verified. I consider edge shear is what we call one-way shear. What is base shear, sliding? I am sorry that I have a lot of similar questions. Because I want to fully...
  10. tmgczb

    Friction Coefficient Between Backfilling Soil and Soil base

    Recently I am reading PIP STE03020-2005. In Chapter 4.2.7, it says "earthquake can cause a tank to tip" What is tip? What kind of failure is it? Without understanding it, I can not further understand 4.2.7.2.
  11. tmgczb

    Friction Coefficient Between Backfilling Soil and Soil base

    This is not self-anchored tank. There are anchor bolts.
  12. tmgczb

    Friction Coefficient Between Backfilling Soil and Soil base

    Please specify.
  13. tmgczb

    Friction Coefficient Between Backfilling Soil and Soil base

    As the title, if friction between backfilling soil in tank ring wall and soil base is considered in resisting sliding, how to determine the friction coefficient?
  14. tmgczb

    How should twist moment due to seismic load be calculated for tank ringwall foundation?

    Dead load ,wind and seismic load all will result in eccentric load. Wind is not combined with seismic load and smaller than seismic load(for the studied tank). So consider dead load and seismic load. In Example 1, MT due to seismic is provided by 'OTM', but nobody provides it to us.
  15. tmgczb

    How should twist moment due to seismic load be calculated for tank ringwall foundation?

    As per Chapter 5.6.4, PIP STE03020, there should be MT value, torsion due to seismic load, to calculate the equivalent bending moment. For stability check, we consider ring wall as an isolated foundation. So maximum pressure is equal to MsE/W. W is section modulus. Than MT could be obtained. But...
  16. tmgczb

    Fundamental Time Period Calculation

    Now vessel load is given, that is, seismic load due to vessel weight is given by vendor. If we simply calculate base shear due to weight of platform and pier, how should we consider? Value of R, height hn, acting point of base shear.
  17. tmgczb

    Fundamental Time Period Calculation

    Kindly please guide for vessel, platform, pier how to determine, R value and recommend a formula to calculate seismic force.
  18. tmgczb

    Fundamental Time Period Calculation

    When calculating Fundamental Time Period for Platform on horizontal vessel and Foundation Pedestal, Ta, using Chapter 12.8, ASCE 7-10. Ta=Ct*Hn^x For Platform, Hn is height from grating to grout(top of pedestal), and seismic force acts at platform beam level. For Pedestal, Hn is height from...
  19. tmgczb

    Are there any examples in SI unit for equipment Foundation Design？

    Are there any examples in SI unit for Tank Ring Wall Design，Horizontal Vessel and Exchanger Foundation Design？ Books，guidelines or articles are required to learn.
  20. tmgczb

    Questions about PIP Storage Tank Foundation Design

    Yes, Mrw is seismic moment，but does W1 include weight of product?

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