A probabilistic approach to quality control and assessing initial reliability precast reinforced constructions

The study aims to improve methods for assessing the serviceability of prefabricated reinforced concrete structures based on an integral estimation of their reliability following the operational monitoring of individual parameters. The serviceability criteria of the investigated structures are set on a probabilistic basis, addressing the main methodology for their field tests according to GOST 8829-94. The proposed non-destructive testing of output is computerised and is carried out every shift together with the versatility of technological factors. The calculation results on the reliability assessment program are a basis for the acceptance of a batch according to the required strength, stiffness, cracking resistance. To develop a probabilistic algorithm for assessing the reliability of works, an optimal calculation model accurately describing stress-strain behaviour (SSB) under loading is necessary. It is strated that a calculation based on design standards and a model with account non-linear nature of deformation occurring in reinforced concrete as elastoplastic material can be used. The reliability and adequacy of the selected models were confirmed by comparing the theoretical data with the results of work field tests performed at the Bratskzhelezobeton plant. As an example, a calculation model for the SSB assessment in load-bearing wall panels with applied combined stress (biaxial bending) was substantiated. A methodology and regulations for automated every-shift quality control of precast reinforced constructions were developed following the versatility of technological factors. Introducing the proposed quality control system to factories manufacturing reinforced concrete products allows the number of structure field tests to be reduced by 6-10 times and the cost of manufactured products by approximately 2.5%.

1. Tamrazjan AG, Dudina IV. Quality assurance of precast concrete structures at the manufacturing stage. Zhilishchnoe Stroitel'stvo = Housing Construction. 2001;3:8–10. (In Russ.)

2. Raizer VD. Theory of structural safety. Moscow: Association of Civil Engineering Universities; 2010. 384 p. (In Russ.)

3. Kovalenko GV, Samarin YA, Mitasov VM. Evaluation jf the stress-strain State of Rissed Slabs different settlement patterns. Proceedings of the Universities. Construction. Architecture. Transport. 1990;11:116–121.

4. Slyusarev GV. Modified vibration method for integral assessment of the quality of reinforced concrete products using longitudinal vibrations. Izvestiya vuzov. Stroitel'stvo i arkhitektura = News of higher educational institutions. Construction. 1995;5-6:122–125. (In Russ.)

5. Ruboratuka IA. Challenges of the quality of reinforced concrete buildings in Dar es Salaam. Tanzania International Journal of Engineering Research & Technology (IJERT). 2013;2(12):820–827.

6. Abdelouafi EIG, Benaissa K, Abdellatif K. Reliability analysis of reinforced concrete building: comparison between FORM and ISM. Procedia Engineering. 2015;114:650–657. https://doi.org/10.1016/j.proeng.2015.08.006

7. Filatov AV. Quality control of concrete constructions. European science. 2015;9(10):28– 29. (In Russ.)

8. Kovalenko GV, Zherdeva SA, Dudina IV. Quality control and evaluation of reliability of precast concrete structures with combined stress state. Sistemy. Metody. Tekhnologii = Systems. Methods. Technologies. 2014;3:161–167. (In Russ.)

9. Kovalenko GV, Dudina IV, Nester EV. Chance models and estimators of primary reliability of constructions with mixed reinforcement. European Science and Technology: materials of the international research and practice conference (31st January 2012, Wiesbaden). Vol. I. Wiesbaden: Bildungszentrum Rodnik E.V. Publ., 2012. P. 237–243.

10. Kovalenko GV, Ljublinskij VA, Dudina IV, Zherdeva SA, Nester EV. Automated method for non-destructive quality control of reinforced concrete structures based on an integral assessment of their reliability. Patent RF, no. 2015128114, 2017. (In Russ.)

11. Kumpyak OG, Galyautdinov ZR, Pakhmurin OR. Serviceability of reinforced concrete frame with joint defects of columns. Vestnik Tomskogo gosudarstvennogo arkhitekturnostroitel'nogo universiteta. 2014;3:88–95. (In Russ.)

12. Kaverzina L, Kovalenko G, Dudina I, Belskii O. Cost efficiency assessment of automated quality control of precast structures. MATEC Web of Conferences. 2018;143:04006. https://doi.org/10.1051/matecconf/201814304006

13. Kaverzina LA, Kovalenko GV, Dudina IV, Belskii OK. Automated quality control of prefabricated structures. Sbornik trudov mezhdunarodnoi nauchno-prakticheskoi konferentsii “Intellektual'nyi gorod: ustoichivost', upravlenie, arkhitektura, renovatsiya, tekhnologii” (08–10 November 2018, Kazan). Kazan: Novoe znanie; 2018. p. 132–136. (In Russ.)

14. Spaethe G. Die Sicherheit tragender Baukonstruktionen. Zweite, neubearbeitete Auflage. Wien: Springer-Verlag; 1992. 303 s.

15. Dudina IV, Nester EV. Methodology of real researches of ferro-concrete covering plates. Sistemy. Metody. Tekhnologii = Systems. Methods. Technologies. 2011;9:113–118. (In Russ.)

16. Dudina IV, Ramazanova GA, Nester EV. Influence of some design parameters of the combined reinforcement of concrete beams in assessing their limit states. Sistemy. Metody. Tekhnologii = Systems. Methods. Technologies. 2018;2:139–145. https://doi.org/10.18324/2077-5415-2018-2-139-145 (In Russ.)

17. Karpenko NI. General models of mechanics of reinforced concrete. Moscow: Stroiizdat; 1996. 416 p. (In Russ.)

18. Plevkov VS, Baldin IV, Baldin SV, Laskovenko AG, Laskovenko GA. Strength and crack resistance of reinforced concrete elements under the combined action of bending moments, longitudinal and transverse forces. Proceedings of the international scientific conference “Modern problems of calculating reinforced concrete structures, buildings and structures for emergency impacts”. Moscow: NI MGSU; 2016. рр. 323–328. (In Russ.)

19. Voss J. An Introduction to Statistical Computing: a simulation-based approach. Chichester: Wiley; 2013. 396 p.