ANALYSIS OF REINFORCED AND PRESTRESSED CONCRETE LNG OFFSHORE STRUCTURES

Results of a preliminary numerical study on the response of reinforced and prestressed concrete slabs to simulated accidental Liquified Natural Gas (LNG) spillage conditions are presented and evaluated. The slabs analyzed were designed to serve as secondary barriers in a gravity type offshore LNG storage facility. Reinforced concrete one-way slabs with simple and continuous support conditions, and precast, simply supported, prestressed concrete slabs with concentric and eccentric straight tendon profiles are investigated. Environmental effects considered represent sudden, well stirred LNG spills on the top of the slab, the selfweight of the slab and various heads of LNG. The non-linear heat transfer and thermal stress analysis methods utilized are briefly reviewed emphasizing their assumptions and limitations. Problems in formulating realistic mathematical models for materials during transition to cryogenic temperatures are discussed. Analytical results are presented indicating that the initial surface cracks which developed in the simply supported members considered tend to close with time and that displacements generally stabilize. However, axially restrained (continuous) members develop significant tensile membrane forces which adversely affect behavior. Recommendations for future experimental and analytical research are offered.

• Supplemental Notes:
  • This paper was presented at the 12th Annual OTC in Houston, Texas, May 5-8, 1980.
• Corporate Authors:

  Offshore Technology Conference

  6200 North Central Expressway
  Dallas, TX  United States  45206
• Authors:
  • Mahin, S A
  • Matsunaga, E
• Publication Date: 1980

Media Info

• Pagination: p. 429
• Serial:
  • Publication of: Offshore Technology Conference
  • Publisher: Offshore Technology Conference

Subject/Index Terms

• TRT Terms: Concrete structures; Liquefied natural gas; Materials; Offshore structures; Performance; Prestressed concrete; Reinforced concrete; Simulation; Spills (Pollution); Structural analysis; Thermal properties
• Old TRIS Terms: Lng spills; Materials performance; Simulated lng spills
• Subject Areas: Bridges and other structures; Marine Transportation; Materials;

Filing Info

• Accession Number: 00325773
• Record Type: Publication
• Source Agency: Offshore Technology Conference
• Report/Paper Numbers: Volume 3 Proceeding
• Files: TRIS
• Created Date: Mar 12 1981 12:00AM