Effect of Strength Parameters on Seismic Performance of Elevated Tanks by Probabilistic Analysis

Document Type : Research Paper

Authors

Department of Civil Engineering, Faculty of engineering, University of Mohaghegh Ardabili, Ardabil, Iran.

Abstract

Considering the importance of the effect of elevated tank body strength on the seismic performance of model during an earthquake, this research evaluated the effect of Young Modulus of body concrete and foundation as strength parameters on seismic performance of elevated tanks and examines the responses to achieve the optimal body stiffness using probabilistic analysis as an effective method to know the effect of different parameters on the output responses. The system is modeled and analyzed by ANSYS software based on the finite element method. The applied approaches included the Newark method for time integration of the dynamic analysis and the probabilistic analysis using the Latin Hypercube sampling method (LHS). Accordingly, first, the modulus of the elasticity of the tank body and foundation were considered as the input parameters. Seismic responses of the model due to Manjil earthquake ground motions are compared with each other. Obtained results illustrated the capability of presented finite element model.
The obtained results of the probabilistic analysis indicate the sensitivity of responses to the variation of the flexibility of the tank foundation. Increasing the modulus of elasticity of concrete enhances the principle stresses on tank body and decreases tank displacement. According to the diagrams, changes in the modulus of the elasticity of the tank have a significant effect on the response values, and the percentage of response variations is high. However, the variations in modulus of the elasticity have little effect on the values of the output responses.

Keywords

References

  1. Haroun MA, Ellaithy HM (1985) Seismically induced fluid forces on elevated tanks. Journal of technical topics in civil engineering, 111(1), 1-15.
  2. Marashi ES, Shakib H (1997) Evaluations of dynamic characteristics of elevated water tanks by ambient vibration tests. In Proceedings of the 4th International Conference on Civil Engineering, Tehran (pp. 367-73).‏
  3. Haroun MA, Temraz MK (1992) Effects of soil-structure interaction on seismic response of elevated tanks. Soil Dynamics and Earthquake Engineering, 11(2), 73-86.‏ DOI: 10.1016/0267-7261(92)90046-g.
  4. Shrimali MK, Jangid RS (2004) Seismic analysis of base-isolated liquid storage tanks. Journal of Sound and Vibration, 275(1-2), 59-75.‏ DOI: 10.1177/107754603030612.
  5. Dutta S, Mandal A, Dutta, SC (2004) Soil–structure interaction in dynamic behaviour of elevated tanks with alternate frame staging configurations. Journal of Sound and Vibration, 277(4-5), 825-853.‏DOI:10.1016/j.jsv.2003.09.007.
  6. Jadhav MB, Jangid RS (2006) Response of base-isolated liquid storage tanks to near-fault motions. Structural Engineering and Mechanics, 23(6), 615-634.‏ DOI: 10.12989/sem.2006.23.6.615.
  7. Chen JZ, Kianoush, MR (2005) Seismic response of concrete rectangular tanks for liquid containing structures. Canadian Journal of Civil Engineering, 32(4), 739-752.‏ DOI: 10.1139/l05-023.
  8. Kianoush MR, Chen, JZ (2006) Effect of vertical acceleration on response of concrete rectangular liquid storage tanks. Engineering structures, 28(5), 704-715.‏ DOI: j.engstruct.2005.09.022.
  9. Sweedan, AM (2009) Equivalent mechanical model for seismic forces in combined tanks subjected to vertical earthquake excitation. Thin-Walled Structures, 47(8-9), 942-952.‏ DOI: 10.1016/j.tws.2009.02.001.
  10. Livaoglu R (2008) Investigation of seismic behavior of fluid–rectangula tank–soil/foundation systems in frequency domain. Soil Dynamics and Earthquake Engineering, 28(2), 132-146.‏ DOI: 10.1016/j.soildyn.2007.05.005.
  11. Shekari MR, Khaji N, Ahmadi MT (2009) A coupled BE–FE study for evaluation of seismically isolated cylindrical liquid storage tanks considering fluid–structure interaction. Journal of Fluids and Structures, 25(3), 567-585.‏ DOI: 10.1016/j.jfluidstructs.2008.07.005.
  12. Ghaemmaghami AR, Kianoush MR (2009) Effect of wall flexibility on dynamic response of concrete rectangular liquid storage tanks under horizontal and vertical ground motions. Journal of structural engineering, 136(4), 441-451.‏ DOI: 10.1061/(asce)st.1943-541x.0000123.
  13. Moslemi M, Kianoush MR (2012) Parametric study on dynamic behavior of cylindrical ground-supported tanks. Engineering Structures, 42, 214-230. DOI: 10.1016/j.engstruct.2012.04.026.
  14. Panchal VR, Jangid RS (2012) Behaviour of liquid storage tanks with VCFPS under near-fault ground motions. Structure and Infrastructure Engineering, 8(1), 71-88.
  15. Gazi H, Kazezyilmaz-Alhan CM, Alhan C (2015) Behavior of seismically isolated liquid storage tanks equipped with nonlinear viscous dampers in seismic environment. In 10th Pacific Conference on Earthquake Engineering (PCEE 2015), Nov (pp. 6-8).‏
  16. Moslemi M, Kianoush MR (2016) Application of seismic isolation technique to partially filled conical elevated tanks. Engineering Structures, 127, 663-675.‏ DOI: 10.1016/j.engstruct.2016.09.009.
  17. Paolacci F (2015) On the effectiveness of two isolation systems for the seismic protection of elevated tanks. Journal of Pressure Vessel Technology, 137(3), 031801.‏DOI: 10.1115/pvp2014-28563.
  18. Safari S, Tarinejad R (2016) Parametric study of stochastic seismic responses of base-isolated liquid storage tanks under near-fault and far-fault ground motions. Journal of Vibration and Control, DOI: 10.1177/1077546316647576 .
  19. Phan HN, Paolacci F, Bursi OS, Tondini N (2017) Seismic fragility analysis of elevated steel storage tanks supported by reinforced concrete columns. Journal of Loss Prevention in the Process Industries, 47, 57-65. DOI: 10.1016/j.jlp.2017.02.017 .
  20. Bae HR, Grandhi RV, Canfield RA (2004) Epistemic uncertainty quantification techniques including evidence theory for large-scale structures. Computers & Structures, 82(13-14), 1101-1112.‏ DOI: 10.1016/j.compstruc.2004.03.014 .
  21. Altarejos-Garcia L, Escuder-Bueno I, Serrano-Lombillo A (2011) Estimation of the probability of failure of a gravity dam for the sliding failure mode: 11th ICOLD Benchmark workshop on numerical analysis of dams. Theme C, Valencia.
  22. Pasbani Khiavi M (2016) Investigation of the effect of reservoir bottom absorption on seismic performance of concrete gravity dams using sensitivity analysis. KSCE Journal of Civil Engineering, 20(5), 1977-1986.‏ DOI: 10.1007/s12205-015-1159-5 .
  23. Cardoso JB, de Almeida JR, Dias JM, Coelho PG (2008) Structural reliability analysis using Monte Carlo simulation and neural networks. Advances in Engineering Software, 39(6), 505-513. DOI: 10.1016/j.advengsoft.2007.03.015 .
  24. Pasbani Khiavi M, Ghorbani MA and Kouchaki M (2020) Evaluation of the effect of reservoir length on seismic behavior of concrete gravity dams using Monte Carlo method, Numerical methods in civil engineering journal, 5(1), 1-7.
  25. Majid Pasbani Khiavi M, Ghorbani MA and Ghaed Rahmati A, 2020, Seismic Optimization of Concrete Gravity DamsUsing a Rubber Damper, International Journal of Acoustics and Vibration, 25 (3), 425-435.
  26. Fishman G (2013) Monte Carlo: concepts, algorithms, and applications. Springer Science & Business Media.
  27. Wilson EL (2002) Three-dimensional Static and Dynamic Analysis of Structures a Physical Approach with Emphasis on Earthquake Engineering, third ed. Computers and Structures Inc, Berkeley, CA, USA.
  28. Chopra AK (1967) Hydrodynamic pressures on dams during earthquakes. Journal of the Engineering Mechanics Division, 93(6), 205-224.
  29. Chopra AK, Chakrabarti P (1972) The earthquake experience at Koyna dam and stresses in concrete gravity dams. Earthquake Engineering & Structural Dynamics, 1(2), 151-164. DOI: 10.1002/eqe.4290010204 .
  30. Bathe KJ (1996) Finite Element Procedures. Upper Saddle River, New Jersey, USA.
  31. Saini SS, Bettess P, Zienkiewicz OC (1978) Coupled hydrodynamic response of concrete gravity dams using finite and infinite elements. Earthquake Engineering & Structural Dynamics, 6(4), 363-374.‏ DOI: 10.1002/eqe.4290060404 .
  32. Raphael JM (1984) Tensile strength of concrete. In Journal Proceedings (Vol. 81, No. 2, pp. 158-165).
  33. Risk Assessment Forum U.S.: Guiding Principles for Monte Carlo Analysis, Environmental Protection Agencym Washington, DC 20460, 1997.

Files

Share

How to cite

Statistics