Evaluation of Design of RC Silos Subjected to Thermal Loads
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2019, Vol 16, Issue 1
Abstract
Thermal loads are very important factor in designing silos wall and can’t be neglected, so it is necessary for many codes to maintain and study the effect of thermal loads in design. The evaluation of design and construction practices is an essential step in the development of design code for reinforced concrete (RC) silos, especially in the arid zones. The program of study presents some computational analysis of temperature fields and thermal effects occurring in RC silos. This study was conducted specially for this purpose and comprises two major programs. The first program is used to estimate the additional bending moment of silo structures under the effect of temperature differences over several silo wall thicknesses. In this regard, the computer program of Finite Element Model (FEM) using SAP2000 and American Concrete Institute (ACI) code were conducted to establish the current conditions of the silos. Linear and nonlinear analyses were used to evaluate the stresses and displacements for different silos configurations and different loading combinations. The second program is considered to estimate the circumferential forces of silo wall for different thermal loads over several silo wall thicknesses and several radii. This program depends on Euro and Poland codes. Further, the FEM model is also used to compare with these codes. The study results of the additional moment for ACI code and linear and nonlinear analysis of FEM showed it increases with the temperature difference and silo wall thickness increase. It can also be clearly noticed that the moment of nonlinear analysis of FEM have a good matching with the corresponding values in ACI leading to that the nonlinear analysis is good accurate rather than linear analysis. Moreover, the study results of the circumferential force showed a distinct pattern with the temperature difference, silo radii, and insignificant silo wall thickness for each of FEM, Euro and Poland codes. This study is used for rapid determination of critical areas of concern for critical loading combinations and for varying silos configurations.
Authors and Affiliations
Walid M. A. Khalifa, Khaled F. O. El- Kashef
Keywords
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- EP ID EP444697
- DOI 10.9790/1684-1601030111.
- Views 63
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