Analysis of Seismic Response Modification Factor of Concrete Silos and its Effective Parameters

Document Type : Original Article

Authors

1 aletaha University, Tehran, Iran

2 Assistant Professor of Nuclear Science and Technology Institude

Abstract

Abstract
In this research, in order to evaluate the effect of parameters such as geometry, stored material, concrete strength, silo wall thickness and FE mesh size on seismic response modification factor, finite element modeling is generated in three conditions: full, half-filled and empty. In this way finite element Abaqus is used for modeling and static nonlinear pushover analysis. As a sample, two types of models are created: the clinker silo (without basis) and by pass clinker silo (legged). Then, the mentioned models are subjected to nonlinear finite element method and the base shear-displacement diagrams are extracted. All of the mentioned graphs are evaluated by Young method to be bilinear. The response modification factor and the connected parameters such as plasticity, added resistance and plasticity ratio have been calculated.
The calculated response factors are more than that of the design regulation of seismic buildings code (standard of 2800) and also the Code of IBC (Asce-7-16) and it can be said that regulations are conservative.
The results show that the parameters of the geometry (diameter to height) and filled or emptiness of the silos are not very effective in the amount of response modification factor. However, the response behavior factor does not change significantly by increasing the strength of the concrete and it can be concluded that the response factor is not related to the concrete strength.
Increasing the thickness of the silos due to increased plastic capacity increases the R Value and increasing the mesh size due to the reduction of the accuracy of the calculations, reduces R and it indicates that the change of the response factor obtained from the initial value is small and does not affect the behavior much.

Keywords

Main Subjects

References

 [1] R. Livaoglu, A.Durmus, (2015). "A simplified approximation fo seismic analysis of silo-bulk material system". Doi 10.1007/s10518-015-9851-x.
[2] Suvarna Dilip Deshmukh, Rathod S. T., (2013). "COMPARISON OF DESIGN & SEISMIC BEHAVIOR OF RCC SILO". Professor, Pune University, Imperial College of Engineering & Research, Wagholi, Pune, Maharashtra, India, Vol. 6.14,  Issn 2319-7064,  pp 2214-2217
[3] Washuda I. Dhundasi, M.B.Iswhwaragol, (2016). " STATIC AND DYNAMIC BEHAVIOR OF CIRCULAR SILO WITH DIFFERENT LATERAL LOAD RESISTING SYSTEMS". BLDEA’s V.P. Dr. P.G. Halakatti College of Engineering & Technology, Vijayapur, Vol. 4,  Issue 06, Issn 2321-0613, pp 93-100
[4] Ms Rini Riyansi.E, Mrs. Abida Justus, (2017). "COMPARATIVE STUDY OF SILO SUPPORTING STRUCTURE USING RCC & STEEL". Department of Civil Engineering, Sathyabama University, Chennai – 600 119, Tamil Nadu, India, Vol. 3,  Issue 35, Issn 2456-5717, pp 133-145
[5] Ashwini Bidari, K.N.Vishwanath, (2014). "ANALYSIS OF SEISMIC AND WIND EFFECT ON STEEL SILO SUPPORTING STRUCTURE". Dept of Civil Engineering , DSCE , Bangalore, Karnataka, India, Vol. 2, Issn 2321-9637, pp 11-19
[6] Rajani S Togarsi, (2015). "SEISMIC RESPONSE OF REINFORCED CONCRETE SILOS ". Asst. Professor, Department of Civil Engineering, KLS GIT Belagavi, Karnataka, India, Vol.04,  Issue 09, pp 174-178
]7[ س. م. حسینی بای، م. غلام زاده ، "دو خطی کردن منحنی پوش آور و تعیین ضریب رفتار به روش چوپرا"، سومین کنفرانس سالانه پژوهش‌های معماری، شهرسازی و مدیریت شهری.
[8] F. Nateghi, M. Yakhchalian, (2011). "SEISMIC BEHAVIOR OF REINFORCED CONCRETE SILOS CONSIDERING GRANULAR MATERIAL-STRUCTURE INTERACTION". International Institute of Earthquake Engineering and Seismology, Tehran, Iran, pp 3050-3058
[9] Uang, Chia-Ming; "Establishing R (or RW) and Cd factor for building seismic  provisions" , Journal of Structural Engineering ; vol. 117,NO.1,pp, 1991.
[10] Structural response modification factor (Applied Technology Council NO. 19, 1995).
]11[ شرکت مهندسین مشاور سازه اندیشان (رتبه سازه 1)، تهران، ایران.
[12] American Concrete Institute, “ACI 313, Standard Practice for Design and Construction of Concrete Silos and Stacking Tubes for Storing Granular materials,” 1997. 
]13[ نشریه 1- 235، ضوابط و معیارهای طرح و اجرای سیلوهای بتنی، 1382.
Journal of Concrete Structures and Materials
Volume 4, Issue 2 - Serial Number 8
December 2019
Pages 36-50

Files

History

  • Receive Date: 09 January 2019
  • Revise Date: 08 June 2019
  • Accept Date: 05 November 2019

Share

How to cite

Statistics