FEASIBILITY AND COMPARATIVE STUDIES FOR THE USE OF PRESTRESSED CONCRETE IN LARGE STORAGE/PROCESSING VESSELS

The technical feasibility and safety of a 300-m-long prestressed concrete vessel carrying LPG in free-standing tanks are analyzed and evaluated with consideration of all relevant forces and responses. These include stillwater and quasi-static wave bending moments and shears, a dynamic analysis of low-frequency wave and high-frequency springing moments, thermal stresses for a range of probable conditions, plate bending stresses, and fatigue. These were then compared with similar analysis of a steel hull designed on the basis of an existing vessel of similar dimensions and the latest ABS requirements. The concrete hull, being stiffer, was found to develop significantly lower dynamic amplification, particularly in sea states having a significant height less than 4 m. A fully probabilistic analysis of failure during 21 years of service in the North Atlantic showed that the concrete vessel had a lower risk of failure than the steel vessel. Fatigue studies indicated a substantial margin of safety for the concrete vessel even after accidental cracking. The prestressed concrete vessel was found to have adequate safety to justify its use for vessels in hazardous cargo service without limitation as to length.

  • Supplemental Notes:
    • Paper presented at SNAME Annual Meeting, November 16-18, 1978.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Gerwick Jr, B C
    • Mansour, A E
    • Price, E
    • Thayamballi, A
  • Publication Date: 1978-9

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Filing Info

  • Accession Number: 00184807
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Report/Paper Numbers: Paper No. 6
  • Files: TRIS
  • Created Date: Jan 13 1979 12:00AM