Application of seismic isolation to industrial tanks
- Earthquake Protection Systems, San Francisco, CA (United States)
The state-of-the-art in the application of seismic isolation to industrial tanks is presented. Use of seismic isolation in industrial tanks can reduce lateral shaking forces by factors of 3 to 5 for strong earthquake loadings. This level of force reduction offers a practical and economical means of designing tanks on a linear elastic basis, and thereby reduces the risk of local failures and leakage during earthquakes. The case studies presented include: LNG Storage Tanks, an Ammonia Storage Tank, and an Emergency Fire and Cooling Water Tank. The tank capacities range from 50 thousand gallons to 19 million gallons. Two applications are new tanks, and one is a retrofit of an existing tank. The methodology for the design of the isolation bearings and tank structures is presented. The dynamic analysis methods used to perform the seismic analysis of the isolated tanks are reviewed, including the hydrodynamic modeling methods. The engineering principles and theory of the Friction Pendulum isolation bearings are discussed. This pendulum based isolation system results in the same natural period of vibration regardless of changes in the fluid levels in the tank, or temperature, aging, and environmental conditions. Test results for the isolation bearings are presented, including comparisons of experimental and analytical results for dynamic loadings, and strength, temperature and aging tests.
- OSTI ID:
- 129052
- Report Number(s):
- CONF-950740-; ISBN 0-7918-1325-8; TRN: IM9550%%420
- Resource Relation:
- Conference: Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Seismic, shock, and vibration isolation 1995. PVP-Volume 319; Mok, G.C. [ed.] [Lawrence Livermore National Lab., CA (United States)]; Chung, H.H. [ed.] [Argonne National Lab., IL (United States)]; Lin, C.W. [ed.] [Lin (Chi-Wen), Martinez, CA (United States)]; Fujita, S. [ed.] [Tokyo Denki Univ. (Japan). Dept. of Mechanical Engineering]; Ishida, K. [ed.] [Central Research Inst. of Electric Power Industry, Chiba (Japan)]; Suzuki, K. [ed.] [Tokyo Metropolitan Univ. (Japan)]; Karim-Panahi, K. [ed.]; PB: 334 p.
- Country of Publication:
- United States
- Language:
- English
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