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Dose Sloshing have any Effects In Full Vertical Cylindrical Vessels 6

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LSThill

LSThill

Mechanical
Oct 10, 2002
1,120
US
Dose Sloshing have any Effects In Full Vertical Cylindrical Vessels

Given:
Vessel is Inside a building
Seismic Zone = 2A

Material SS= 316L

HHL = 16'-2"

THICKNESS = 1/2" (0.50")
Height = 24’-11
Two head: F&D
Diameter = 18’-00”
Skirt height = 4’-2”

Bottom Shell = 10’-0” and Bottom F & D head has half pipe cooling jacket.

REFERENCE TO ASCE 4-engl 1998 page 14, 3.1.6.3 building model hydrodynamic mass effects (d) the effects of water mass in the vertical direction shal be insluced in the building modle. For wather depths less than 50 ft, the entire water mass may be lumped at the bottom of the basin.

What spreed sheet calculation or software pregram is available?

lst
 
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I don't normally design tanks in buildings, so can't comment on the details of that.

Typically, the standard AWWA D100 seismic design for flat-bottom tanks does include sloshing effects, though perhaps not in the way you'd expect. With a large tank, the sloshing period is very slow, and the net effect is a reduction in seismic loading, as compared to just assuming the water is all a rigid chunk. As you get to smaller diameters, you begin to reach a point where the sloshing effect actually adds to the load, rather than reducing it. The sloshing effect is modeled simply as a spring-mass system, just the period (and thus loading) are different.

On a small tank like yours, where the overall geometry is not a conventional design, it would make sense to treat all the water as a lumped mass, provided any applicable codes let you work it that way.
 
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JStephen (Mechanical)

ASME SECTION VIII, DIV 1, 100%RT,
 
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While working on another project, I happened to notice that the IBC-2000 does require sloshing to be considered if the natural frequency of the sloshing is close to the natural frequency of the building.

And, in scanning back through the original post, I see you specify a FULL vessel, and I assume there would be no sloshing in a full vessel; ie, full of liquid.
 
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TEAM MEMBERS

INDEX Seismic reference technical papers Unachored and Anchored Liquid StorageTanks
1. TID-7024 NUCLEAR REACTORS AND EARTHQUAKES. PDF
2. The Study on Dynamic Characteristics of Cylindrical Tanks with diametrical imperfection.pdf
3. STUDY OF FACTORS AFFECTING THE SEISMIC RESPONSE OF UNACHORD TANKS.pdf
4. STD-10202002[1].pdf
5. STATE OF THE ART REPORT ON HIGH-LEVEL WASTE TANK CLOSURE (U).pdf
6. Sloshing Effects in Half-Full Horizontal Cylindrical Vessels Under Longitudinal Excitation.pdf
7. Simulation of Dynamic Behavior of Unanchored Tanks,.pdf
8. Simplified Modeling of Liquid-Structure Interaction in the Seismic Analysis of Cylindrical Liquid Storage Tanks,.pdf
9. Simple Procedure for Seismic Analysis of Liquid-Storage Tanks.pdf
10. SEISMIC EVALUATION OF UNANCHORED CYLINDRICAL TANKS.pdf
11. Seismic Design Guidelines for Liquefied Natural Gas Tanks..pdf
12. Seismic Design Considerations for Uplifted Tanks.pdf
13. Seismic Analysis of the Meter Feed Hold Tank (MFHT).pdf
14. Review of Code Provisions on Seismic Analysis of Liquid storagge Tanks.pdf
15. PN-PVP2005-71043.pdf
16. Numerical Computation of Hydrodynamic Loads on Walls of a Rigid rectangular Tank Due to large Amplitude Liquid sloshing.pdf
17. NUMERICAL COMPUTATION OF HYDRODYNAMIC LOADS ON WALL OF A RIGID RECTANGULAR TANK DUE TO LORGER AMPLITUDE LIQUID SLOSHING.pdf
18. NUMERICAL ANALYSIS OF SLOSHING PROBLEM.pdf
19. Nonlinear Dynamic Response of Unanchored Ground-Based Tanks.pdf
20. FLOW FIELD AROUND SINGLE AND MULTIPLE HOLLOW MQ47434.pdf
21. Factors Affecting the Nonlinear Seismic Response Of Unanchored Tanks,.pdf
22. EXPERIMENTAL INVESTIGATION OF SURFACE REORIENTATION AND OSCILLATIONS OF LIQUID.pdf
23. Evolution of Seismic Analyses of Unanchored Tanks.doc
24. EC8_Part 4 Silos tanks and pipelines.pdf
25. DEVELOPMENT OF PRACTICAL DESIGN GUIDELINES FOR UNANCHORED LIQUID STORAGE TANKS.doc
26. DETERMINATION OF THE OPTIMAL PIPE SUPPORT SPANS FOR GEOTHERMAL PIPELINES.pdf
27. csni-r2001-13-vol4.pdf
28. COUPLED SLOSH DYNAMICS OF LIQUID FILLED CONTAINERS USING PRESSURE BASED FINITE ELEMENT METHOD.pdf
29. Computer Simulation of the Nonlinear Liquid-Structure Interaction Problem with Free Surface.pdf
30. Characterization of Observed Uplift and Buckling of An Unanchored Tank During the Northridge Earthquake,.pdf
31. C14 NONBUILDING STRUCTURE DESIGN REQUIREMENTS.pdf
32. AWWA D103-97 Factory -Coated bolted Steel Tanks.pdf

33. BASIS OF SEISMIC DESIGN PROVISIONS FOR WELDED STEEL OIL STORAGE T ANKS.pdf
34. Benefits of non-liner behavior in the Seismic Response of Water Storage Tank.pdf
35. AWWA D100-96.pdf
36. ASCE 4-98.doc
37. APPENDIX 2 (page 32).doc
39. API 650 addendum3.pdf
40. A nonlinear numerical model for sloshing motion in tuned liquid dampers.doc
41. A new ALE formulation for sloshing analysis.pdf
42. A Computational Technique for the Nonlinear Dynamic Analysis of Unanchored Liquid Storage Tanks,.pdf

FROM "google search"

lst

 
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Does anyone have any comments on the usefullness of these references listed by Isthill?
 
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I think that the deafening silence is comment enough.
 
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Keep listening TGS4. Several of the papers listed are the primary sources for the seismic rules we follow today. Many of the more recent papers, while interesting, have added academic volume but have not really influenced the way we treat seismic loads on tanks. TID-7024 and the "Basis of Seismic Design Provisions..." are probably the more useful ones in the list. Hope this helps.

Steve Braune
Tank Industry Consultants
 
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SteveBraune and Isthill,

Thank you both for the information.
 
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Question: Are the references listed actually availble for download somewhere? Or is this just hits off google?
 
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On some of these, a Google search of the title just pulls up references to it, on some it pulls up a .pdf file.
 
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I agree with JStephen - links to the documents (wjether for purchase or free) is far momre useful than a list of pdfs. In the future, please either provide complete citations (author, title, publication, year, publisher, page number) or links to the websites where one can purchase/read the documents.

SteveBraune, I am still listening. However good the documents might be, with the pdf filename only, they have little value to me.
 
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JStephen (Mechanical)& TGS4 (Mechanical)

The list is the actual published document in the .pdf format and available on the WEB using Google search. (ASME and others).

What did surprise me is AWWA D103-97 Factory -Coated bolted Steel Tanks.pdf, AWWA D100-96.pdf, API 650 addendum3.pdf, and API 620 2004 July A. is available free!

TGS4 (Mechanical)

Sir, you have the document name, now it is up to you.

PS: I need this technical refernce for my current assignment

I do hope this dose help the GOBLE TEAM MEMBERS

 
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Normally, when you buy the API documents, the addenda are free anyway.

The AWWA documents are pirated- they are copyrighted and posted in violation of the copyright.
 
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TGS4---You can "cut and paste" to Google from here.
 
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Isthill, deanc and others,

You are correct. Mea culpa.
 
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