Recommendations for the seismic design of petrochemical plants
DOI:
https://doi.org/10.5459/bnzsee.15.3.105-122Abstract
Difficulties in applying the seismic design provisions of the NZ Standard Code of Practice for General Structural Design and Design Loadings for Buildings, NZS 4203:1976, to multi-component petrochemical facilities lead to the preparation of the document: Seismic Design of Petrochemical Plants - Volume 1: Recommendations and Volume 2: Commentary.
This paper explains the basis of that document. The philosophy that is used provides for a consistent level of earthquake protection to the various components of a petrochemical facility according to the importance of the component and the potential hazard associated with its failure. This is achieved by establishing design load levels based on assessed seismic risk and structure reliability. An important part of the philosophy is the minimising of seismic risk by the elimination or modification of potentially hazardous situations at the conceptual design stage.
The derivation of basic seismic design coefficients from a seismicity study of New Zealand is described and the analysis and detailing procedures adopted in the Recommendations for structures and equipment in petrochemical facilities are discussed. Particular attention is given to explaining the application of capacity design principles to ductile structural forms.
References
NZS 4203:1976 "Code of Practice for General Structural Design and Design Loadings for Buildings", Standards Association of New Zealand.
"Seismic Design of Petrochemical Plants - Volume 1 : Recommendations and Volume 2 : Commentary", prepared for the Ministry of Energy by the Ministry of Works and Development, New Zealand, March 1981.
Berrill, J.B., Priestley, M.J.N, and Chapman, H.E., "Design Earthquake Loading and Ductility Demand",
(Section 1 in a series of papers produced by the NZNSEE discussion group on seismic design of bridges) Bulletin of the NZ National Society for Earthquake Engineering, Vol. 13, No. 3 September 1980.
ATC 3-06, "Tentative Provisions for the Development of Seismic Regulations for Buildings", (prepared by the Applied Technology Council associated with the Structural Engineers' Association of California), US National Bureau of Standards Special Publication 510, 1978.
Jury, R.D., Hollings, J.P., "A Numerical Method for Seismic Risk Assessment", presented at the NZIE Conference, Canterbury University, Christchurch, February 8-12, 1982.
Shibota, H., "Anti-Earthquake Design on Industrial Facilities", Technocrat Vol. 8, No.11.
Peek, R., "Estimation of Seismic Risk in New Zealand", University of Canterbury, Department of Civil Engineering Report 80/12, August 1980.
API 650, "Welded Steel Tanks for Oil Storage", American Petroleum Institute, 1979.
Priestley, M.J.N., Evison, R.J. and Carr, A.J., "Seismic Response of Structures Free to Rock on their Foundations", Bulletin of the NZ National Society for Earthquake Engineering, Vol.11, No.3, September 1978. DOI: https://doi.org/10.5459/bnzsee.11.3.141-150
Taylor, P.W. and Williams, R.L., "Foundations for Capacity Designed Structures", Bulletin of the NZ National Society for Earthquake Engineering, Vol.12, No.2, June 1979. DOI: https://doi.org/10.5459/bnzsee.12.2.101-113
Kelly, T.E., "Floor Response of Yielding Structures", Research and Development Report 78/1, prepared in the office of the Chief Structural Engineer, Ministry of Works and Development, New Zealand, September 1978.
