Effects of Soil Modulus and Flexural Rigidity on Structural Analysis of Water Intake Basins
Abstract
A water intake basin is a buried box that functions as a water reservoir near shorelines. Number of these structures has been increased in the recent years and for a safe design, it is necessary to know their behaviour under applied loads. In addition to common dead, live and seismic loads, the bottom of such a basin is usually located below sea water level and endures uplift pressure as well as reaction of supporting soils. Uncertainty of these special loads complicates the structural response of this buried basin to the applied loads. Therefore, the unreliability in the soil parameter and in the rigidity of the basin structure is studied in this research by calculating the generated internal bending moments. Different loads and load combinations have been taken into account and finite element analysis is carried out for modelling nonlinear behaviour of different types of supporting soils. It is concluded that the geometry and flexural stiffness of the basin affects the analysis more than the soil parameters because the contribution of the soil modulus in the total stiffness of the system is negligible than the structural rigidity of the basin structure. In addition, inner walls and geometry of the basin should be modelled in detail to obtain acceptable results.
Keywords
References
Bleninger, T., G. H. Jirka, and S. Lattemann. "Environmental planning, prediction and management of brine discharges from desalination plants." Middle East Desalination Research Center (MEDRC): Muscat, Sultanate of Oman (2010)..
Roscoe Moss Company. Designing buried seawater intake structured for enhanced corrosion resistance and prolonged durability. Technical memorandum 008-2. (2008).
Mackey, Erin D., and Water Research Foundation. Assessing seawater intake systems for desalination plants. Water Research Foundation, 2011.
Akbari, H., Ebrahimi, M.H., Near field mixing of Multi-Diffuser Dense Jets in Shallow water condition and Ambient Currents. 15th national hydraulic conference, Iran. (2016).
Pita, E., and Isidro Sierra. "Seawater intake structures." In Proceedings International Symposium on Outfall Systems. Mar del Plata, Argentina. 2011.
Pun, W. K., W. M. Cheung, and L. S. Lui. "Geotechnical standards in Hong Kong." In New Generation Design Codes For Geotechnical Engineering Practice—Taipei 2006.
Poulos, H. G. "Methods of Analysis of Piled Raft Foundations. Report to Technical Committee TC 18 on Piled Foundations." (2001).
Balasurbamaniam, S., and E. Y. N. Oh. "Parametric Study on Piled Raft Foundation in Sand Using Numerical Modelling." In Eleventh East Asia pacific Conference on Structural Engineering and Construction, pp. 19-21. 2008.
ACI 318-2008: Building code requirements for structural concrete (2008). Standard code.
Kame, G. S., S. K. Ukarande, K. Borgaonkar, and V. A. Sawant. "A parametric study on raft foundation." In 12th International Conference of International Association for Computer Methods and Advances in Geomechanics (IACMAG), Goa, India, pp. 3077-3085. 2008.
Hussein, H. "Effects of flexural rigidity and soil modulus on the linear static analysis of raft foundations." Journal of Babylon University, Pure and Applied Sciences 19, no. 2 (2011).
Moayed, Reza Ziaie, and Masoud Janbaz. "Foundation size effect on modulus of subgrade reaction in clayey soil." Electronic Journal of geotechnical Engineering 13 (2008): 1-8.
Gagin, V. and Ivanilov P., Analysis of Lengthy Structures Resting on Multi-Layer Soil Foundation Taking Into Account Stochastic Behavior of Soil, Studia Geotechnica et Mechanica, Moscow, Russia, Vol. XXX, No. 3–4. (2008).
Liao, S. S. C. "Estimating the coefficient of subgrade reaction for plane strain conditions." In Proceedings of the Institution of Civil Engineers: Geotechnical Engineering, vol. 113, no. 3. 1995.
Widjaja, Budijanto. "Parametric Studies for Obtaining the Dimension of Soil Improved Area." Volume 8, No. 1, pp. 31–35. (2008).
Iranian standard for design of coastal structures (1392-2013), (NO. 631: design conditions). Standard code.
DOI: 10.28991/cej-2017-00000083
Refbacks
- There are currently no refbacks.
Copyright (c) 2017 Hassan Akbari
This work is licensed under a Creative Commons Attribution 4.0 International License.
