Influence of geometric deviations on the stress-strain state of overbridge at tailings thickener

Introduction. The article presents the results of testing a developed methodology for assessing the effect of geometric deviations on the stress-strain state of the metal structures of an overbridge at the facility of «Tailings Thickener 1», located at the Natalka Mining Processing Plant. A brief review of previously performed studies for recording deviations of metal structures is provided, along with confirming the relevance of the problems solved in the article and the study in general. It was substantiated that it is necessary to adjust the previously developed project on the overbridge of a thickener (OT); the applicability of the developed methodology was demonstrated.

Aim. In the article, the methodology for determining the stress-strain state of frame metal structures was tested in the light of deviations, using the example of an OT.

Materials and methods. The following materials and methods were used:

– the finite element method implemented in SCAD 11.5 was applied in the numerical study of the state of the (OT) having deviations;

– the theory of dimensional chains and the method of geometric modeling implemented in the authoring software entitled the «Dimensional analysis of rod structures» Computational Complex were used to determine the values of geometric deviations.

Results. The results presented in the article allowed for timely substantiation of the amendments of the documentation and an increase in the reliability and economic efficiency of the OT, as well as the entire facility. During research:

– possible geometric deviations of the OT were forecasted, along with plotting the limiting values of possible geometric deviations of nodes in three directions (X, Y, Z);

– effect of possible geometric deviations on the stress-strain state of the OT metal structures was included in its verification calculations, which substantiated the necessity of adjusting the project and optimizing previously made decisions;

– values of permanent and temporary loads were reduced, which allowed the possible emergency situations at the facility to be avoided.

Conclusions. The developed methodology for determining the stress-strain state of frame metal structures was validated on the example of an overbridge of a thickener, taking into account the accumulation of geometric deviations during its manufacture and installation.

1. Bondarev A.B., Yugov A.M. Computer program “Computational complex “Dimensional analysis of rod structures” (“VK RASK”). Copyright certificate 47952 Ukraine; 20.02.2013 (in Russian).

2. Barabash M.S. The methods of computer simulation erection process of high-rise buildings. International Journal for Computational Civil and Structural Engineering. 2012;8(3):58–67 (in Russian).

3. Belostotsky A.M., Pavlov A.S. Complex finite element modeling of VAT and stability of the mesh shell covering a large-span structure with elastomeric supports. International Journal of Computational Civil and Construction Engineering. 2014;10(3):64–70 (in Russian).

4. Bondarev A.B., Yugov A.M. Assessment of installation efforts in a metal coating taking into account assembly. Inzhenerno-stroitel’nyi zhurnal = Magazine of Civil Engineering. 2015;56(4):28–37 (in Russian).

5. Gvamichava A.S. Development and implementation of design forms and methods of calculation of largesized space antenna structures: abstract of the dissertation for the degree of Doctor of Technical Sciences. Moscow: TSNIIPSK named after N.P. Melnikov; 1984 (in Russian).

6. Kassikhina E.G. A new constructive form of a multi–purpose overhead copra. Gornyi Zhurnal. 2017;(8):56–60 (in Russian).

7. Kirsanov M.N. Inductive analysis of the influence of mounting errors on the rigidity and strength of a flat truss. Inzhenerno-stroitel’nyi zhurnal = Magazine of Civil Engineering. 2012;(5):38–42 (in Russian).

8. Lebed' E.V., Grigoryan A.A. The influence of the mounting design schemes of the edges of a two-belt metal dome on the initial efforts to eliminate errors. Vestnik MGSU. 2015;(8):66–79 (in Russian).

9. Moiseev M.V. Initial efforts and assemblability of steel structural structures with random deviations of rod lengths [dissertation]. Kazan: Kazan State University of Architecture and Engineering (KSUAE); 2004 (in Russian).

10. Norov Yu.D. Scientific support of mining and metallurgical production. Gornyi Zhurnal. 2017;(8):56–60 (in Russian).

11. Perelmuter A.V., Kabantsev O.V. Consideration of changes in the stiffness of elements during installation and operation. Inzhenerno-stroitel’nyi zhurnal = Magazine of Civil Engineering. 2015;(1):6–14 (in Russian).

12. Savelyev V.A. Theoretical foundations of the design of metal domes [dissertation]. Moscow: TSNIISK named after Melnikov; 1995 (in Russian).

13. Yugov A.M., Malash E.A., Bondarev A.B. Experience of installation of technological equipment of the enrichment tailings thickener No. 1 of the Natalka mining and processing plant. Montazhnye i spetsial’nye raboty v stroitel’stve [Assembly and special works in construction]. 2016;(10):2–6 (in Russian).

14. Mahovič A. Typology of Retractable Roof Structures in Stadiums and Sports Halls. Igra ustvarjalnosti – Creativity game. 2015;3:90–99. https://doi.org/10.15292/iu-cg.2015.03.090-099

15. Bondarev A.В., Yugov A.М. The Method of Generating Large-Span Rod Systems with the Manufacturer Defect and Assembly Sequence. Procedia Engineering. 2015;117:953–963. https://doi.org/10.1016/j.proeng.2015.08.188

16. Jadhav H.S., Patil Ajit S. Parametric study of double layer steel dome with reference to span to height ratio. International Journal of Science and Research (IJSR). 2013;2(8):110–118.

17. Jianguo Cai, Jian Feng, Chao Jiang. Development and analysis of a long span retractable roof structure. Journal of Constructional Steel Research. 2014;92:175–182. https://doi.org/10.1016/j.jcsr.2013.09.006

18. Kabantsev O.V., Perelmuter A.V. Modeling Transition in Design Model when Analyzing Specific Behaviors of Structures. Procedia Engineering. 2013;57:479–488. https://doi.org/10.1016/j.proeng.2013.04.062

19. Kim H.S., Shin A.K. Column shortening analysis with lumped construction sequence. Procedia Engineering. 2011;14:1791–1798. https://doi.org/10.1016/j.proeng.2011.07.225

20. Patidar S., Gandhe V. Typology of Retractable Roof Structure. International Journal of Advance Research, Ideas and Innovations in Technology. 2017;3(3):556–560.

21. Preumont A. Vibration control of active structures: an introduction. 2-nd Ed. New York, Boston, Dordrecht, London, Moscow: Kluwer Academic Publishers; 2002. https://doi.org/10.1007/978-94-007-2033-6

22. Poojara S.D., Patel P.V. Axial deformation of columns in multi-story R.C. buildings. International Journal of Science and Research (IJSR). 2014;5(3):294–300.

23. Sonmez M. Artificial bee colony algorithm for optimization of truss structures. Applied Soft Computing. 2011;11:2406–2418.