Design and Analysis of Tank Ring Wall Foundation by using STAAD Pro V8i
Keywords:
STAAD Pro, Earthen Foundations, Steel Shell, Anchor Bolt, Ring WallAbstract
In oil & gas and Petrochemical Industries, mostly large storage liquids are required. These storage tanks are of Steel shell, which require either concrete or earthen foundations as per the requirement. These foundations are to be designed for Tank liquid load, Wind or Seismic loads etc. for anchoring the tank, Anchor bolts may require. Different process conditions like, upward pressure inside tank etc to be considered while designing tank foundations. The Ring wall foundation for these tanks to be designed is not like ordinary building foundation design. The foundation just receives approximately 10% of the tank shell load, but all the load of the liquid contained in the tank is directly transferred to the soil and the soil has to lively bear this load. So the soil bearing capacity, soil condition takes the main role and design criteria is to be designed based on Height of the tank, soil conditions, soil bearing capacity, total liquid load contained in the tank. Also the settlement analysis has to be carried out carefully as the outer pipes connected to it may get disturbed and this Tank Settlement should be investigated by the geotechnical engineer as another primary issue in tank foundation performance and total Settlement, differential settlement, interior settlement, and edge settlement should be evaluated. In this paper taking all these considerations manual method is designed and it is modeled in STAAD.PRO Software. Performance of the designed Ring wall foundation as obtained from the STAAD.PRO analysis is then compared with that obtained from manual calculations.
References
- Klepikov (1989) and USACE (1990) are general documents for various structures, either with fixed or floating roof, The following points should be noted from API 653 (1995)
- Turn bull,J.E., H.A. Jackson, and D. Lowe. (1979) Worked on performance of Reinforced ring foundations
- Design criteria were based on the Canadian Farm Building Code (1977), and solutions were calculated for soils ranging from 72 to 288 kN/m2 (1500 to 6000 lb/ft2)? safe bearing pressures.
- D'Orazio and Doncan (1989) are very valuable because they are real data of settlement for steel tanks which are used to store oil materials.
- Moradi , Amir Mahmoudzadeh and Yahya Rahim Safavi (Jan. - Feb. 2017), by? various types of Storage Tank Foundations.
- Stanislav Dovnarovitch? and Yurji Ivanov(1988) by A simple technique has been proposed to prevent the failures that can be easily Applied when constructing the tanks.
- Klepikov (1989) reviewed a large number of references related to allowable settlement.
- USACE (1990) published an engineering manual, EM 1110-1-1904, for geotechnical procedures.
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