ACCOUNTING OF THE OWN THERMO-STRESSED STATE OF THE SOLID CONCRETE WHILE PROVIDING THE REQUIRED CONSUMER PROPERTIES OF THE CRIMEAN BRIDGE CONSTRUCTIONS

Introduction. The paper deals with the issues related to the determination and registration of the own thermo-stressed state formed in concrete while hardening and used to provide the required consumer properties in the Crimean bridge construction. Therefore, the problem is relevant because of the deadlines for the construction of such facility in the conditions of rough terrain and dry hot climate, and also taking into account the development of the unique non-class facilities in Russia.

Materials and methods. The research is carried out in real-time conditions with the usage of modern measuring systems in practice, allowing to control the process of temperature and strength of hardening concrete in time. The modern computational and analytical complex, which is repeatedly tested under real conditions and by thermophysical calculations of hardening concrete of various class objects and massiveness, is used.

Results. The results of the intrinsic thermo-stressed state of hardening concrete are presented in determining the permissible temperature gradient, which make it possible to accelerate the process of erecting the object with observance of the necessary consumer properties.

Discussion and conclusion. The main conclusions and suggestions are made taking into account the intrinsic thermally stressed state of the concrete when it was hardened during the construction of the Crimean bridge. The paper would be interesting and useful for engineers and technical workers engaged in real production conditions, and for specialists dealing with the issues of the thermophysical processes occurring in concrete hardening and with the problems of ensuring the high consumer concrete properties in structures.

1. Kosmin V.V., Mozalev S.V. Problemy issledovaniy, proyektirovaniya i stroitel’stva mostov bol’shikh prolotov [Research problems, design and construction of large span bridges]. Nauchno-tekhnicheskiy zhurnal Vestnik mostostroyeniya, 2014, no 1, pp. 19-24. (in Russian)

2. Krasnovskiy B.M. Inzhenerno-fizicheskiye osnovy metodov zimnego betonirovaniya [Engineering and physical foundations of winter concreting methods]. Moscow,GASIS, 2004. 470 p. (in Russian)

3. Sokolov S.B. Vliyaniye kolebaniy temperatury vozdukha v teplyakakh na temperaturu tverdeyushchego betona pri vozvedenii monolitnykh plitno-rebristykh prolotnykh stroyeniy v kholodnyy period goda [Influence of air temperature fluctuations in hotbeds on the temperature of hardening concrete during the erection of monolithic slab-ribbed spans during the cold period of the year]. Nauchnyye trudy OAO TSNIIS Ot gidravlicheskogo integratora k sovremennym komp’yuteram, 2002, no 213. Moscow, TSNIIS, pp. 167-172. (in Russian)

4. Passek V.V., Zakovenko V.V., Antonov Ye.A., Yefremov A.N. Primeneniye iskusstvennogo okhlazhdeniya v protsesse upravleniya temperaturnym rezhimom vozvodimykh zhelezobetonnykh arok [Application of artificial cooling in the process of the temperature regime controlling of erected reinforced concrete arches]. Nauchnyye trudy OAO TSNIIS Ot gidravlicheskogo integratora k sovremennym komp’yuteram, 2002, no 213. Moscow, TSNIIS, pp. 73-75. (in Russian)

5. Smirnov N.V., Antonov Ye.A. Rol’ polzuchesti betona v formirovanii termonapryazhonnogo sostoyaniya monolitnykh zhelezobetonnykh konstruktsiy v protsesse yeyo vozvedeniya [Role of concrete in the formation of the thermo-stress state of monolithic reinforced concrete structures in the process of its erection]. Nauchnyye trudy OAO TSNIIS Ot gidravlicheskogo integratora k sovremennym komp’yuteram, 2005, no 213. Moscow, TSNIIS, pp. 89-117. (in Russian)

6. Yevlanov S.F. Tekhnologicheskiye treshchiny na poverkhnosti monolitnykh prolotnykh stroyeniy [Technological cracks on the surface of monolithic building structures]. Nauchnyye trudy OAO TSNIIS Problemy normirovaniya i issledovaniya potrebitel’skikh svoystvmostov, 2002, no 208. Moscow, TSNIIS, pp. 27-36. (in Russian)

7. Vasil’yev A.I., Veytsman S.G. Sovremennyye tendentsii i problemy otechestvennogo mostostroyeniya [Modern trends and problems of domestic bridge construction]. Vestnik mostostroyeniya, 2015, no 1, Moscow, pp. 2 - 17. (in Russian)

8. Solov’yanchik A.R., Shifrin S.A., Il’in A.A., Sokolov S.B. Vybor tekhnologicheskikh parametrov proizvodstva betonnykh rabot pri vozvedenii massivnykh rostverkov i opor arochnogo pilona vantovogo mosta cherez reku Moskvu [Selection of technological parameters for the production of concrete works during the erection of massive grillage and support of the arch bridge of the cable bridge over the Moscow River]. Nauchnyye trudy OAO TSNIIS Issledovaniye transportnykh sooruzheniy, 2006, no 230, Moscow, TSNIIS, pp. 24-30. (in Russian)

9. Solov’yanchik A.R., S.M. Pulyayev, I.S. Pulyayev. Issledovaniye teplovydeleniya tsementov, ispol’zuyemykh pri stroitel’stve mostovogo perekhoda cherez Kerchenskiy proliv [Investigation of the cements heat release used in the construction of the bridge across the Kerch Strait]. Vestnik SibADI, 2018, no 2, pp. 283-293. (in Russian)

10. Solov’yanchik A.R., Korotin V.N., Shifrin S.A., Veytsman S.G. Opyt snizheniya treshchinoobrazovaniya v betone ot temperaturnykh vozdeystviy pri sooruzhenii Gagarinskogo tonnelya [Experience in reducing cracking in concrete from thermal effects during the construction of the Gagarinsky tunnel]. Vestnik mostostroyeniya, 2002, no 3-4, pp. 5359. (in Russian)

11. Ginzburg A.V. Obespecheniye vysokogo kachestva i effektivnosti rabot pri vozvedenii tonneley iz monolitnogo betona [Ensuring the high quality and efficiency of work in the construction of tunnels from monolithic concrete]. Vestnik MGSU, 2014, no 1, pp. 98110. (in Russian)

12. Solov’yanchik A.R., Shifrin S.A., Korotin V.N., Veytsman S.G. Realizatsiya kontseptsii «kachestvo» pri sooruzhenii Gagarinskogo tonnelya v g. Moskve [Realization of the quality concept in the construction of the Gagarinsky tunnel in Moscow]. Nauchnyye trudy OAO TSNIIS «Tekhnologii i kachestvo vozvodimykh konstruktsiy iz monolitnogo betona», 2003, no 217, pp. 206-212. (in Russian)

13. Balyuchik E.A., Velichko V.P., Chernyy K.D. Izgotovleniye blokov oblitsovki v zimniy period stroitel’stva mosta cherez reku Angaru [Manufacturing of cladding units during the winter construction of thebridge across the Angara River]. Transportnoye stroitel’stvo, 2012, no 10, pp. 4- 7. (in Russian)

14. Solov’yanchik A.R., Pulyayev I.S. Preduprezhdeniye treshchinoobrazovaniya v betone pri vozvedenii nizhnikh chastey pilonov vantovogo mosta cherez reku Oku na obkhode goroda Muroma [Prevention of cracking in concrete when erecting the lower parts of the pylons of the cable-stayed bridge across the Oka River on the bypass of the Murom city]. Vestnik MGSU, 2008, no 1, pp. 285 Murom 295. (in Russian)

15. Solovyanchik A.R., Krylov B.A., Malinsky E.N. Inherent thermal stress distributions in concrete structures and method for their control. Thermal Cracking in Concrete at Early Ages. Proceedings of the International RILEM Symposium. Munich, 1994. 5 p.

16. Pulyayev I.S., Dudayeva A.N. Issledovaniye temperaturnogo rezhima tverdeyushchego betona verkhnikh yarusov verkhney chasti pilonov pri stroitel’stve mosta cherez r. Oku na obkhode g. Muroma [Investigation of the temperature regime of hardening concrete of the upper layers of the upper part of the pylons during the construction of the bridge over the Oka River on the bypass of the city of Murom]. Nauchnyye trudy OAO TSNIIS Ispytaniya i raschoty konstruktsiy transportnykh sooruzheniy, 2009, no 251. Moscow, TSNIIS, pp. 45-52. (in Russian)

17. Solov’yanchik A.R., Shifrin S.A., Korotin V.N., Veytsman S.A. Opyt ispol’zovaniya nepolnogo obzhatiya betona dlya preduprezhdeniya poyavleniya treshchin v konstruktivnykh elementakh transportnykh sooruzheniy [Experience in the use of incomplete compression of concrete to prevent the appearance of cracks in structural elements of transport structures]. Nauchnyye trudy OAO TSNIIS Tekhnologiya i kachestvo vozvodimykh konstruktsiy iz monolitnogo betona, 2003, no 217. Moscow, TSNIIS, pp. 200-205. (in Russian)

18. Tarasov A.M., Bobrov F.YU., Pryakhin D.V. Primeneniye fizicheskogo modelirovaniya pri stroitel’stve mostov i drugikh sooruzheniy [Application of physical modeling in the construction of bridges and other structures]. Vestnik mostostroyeniya, 2007, no 1, pp. 21-26. (in Russian)

19. Pryakhin D.V. Issledovaniye raboty vantovogo prolotnogo stroyeniya mosta metodami fizicheskogo modelirovaniya [Investigation of the cable-stayed bridge structure using physical modeling methods]. Transportnoye stroitel’stvo, 2009, no 10, pp. 11-13. (in Russian)

20. Velichko V.P., Chernyy K.D. Uchet napryazhenno-deformirovannogo sostoyaniya v sborno-monolitnykh oporakh mostov na stadii ikh sooruzheniya [The account of the stress-strain state in the team-monolithic bridge supports at the stage of their construction]. Transportnoye stroitel’stvo, 2013, no 2, pp. 11-13. (in Russian)

21. Luk’yanov V.S., Solov’yanchik A.R. Fizicheskiye osnovy prognozirovaniya sobstvennogo termonapryazhonnogo sostoyaniya betonnykh i zhelezobetonnykh konstruktsiy [Physical basis for predicting the intrinsic thermo-stress state of concrete and reinforced concrete structures]. Sbornik nauchnykh trudov TSNIIS, no 73. Moscow, TSNIIS, 1972. pp. 36-42. (in Russian)

22. Luk’yanov V.S., Solov’yanchik A.R. Issledovaniye teplovydeleniya tsementa v termosnom kalorimetre TSNIISa [Investigation of the heat release of cement in a thermosensitive calorimeter of CNIIIS]. Sbornik dokladov Metody eksperimental’nogo opredeleniya i raschota teplovydeleniya v betone. Moscow, VNIIPI Teploproyekt, 1971. pp. 45-58. (in Russian)

23. Luk’yanov V.S., Denisov I.I. Raschot termouprugikh deformatsiy massivnykh betonnykh opor mostov dlya razrabotki mer po povysheniyu ikh treshchinostoykosti [Calculation of thermoelastic deformations of massive concrete bridge supports to develop measures to increase their fracture toughness]. Sbornik nauchnykh trudov TSNIIS, no 36. Moscow, TSNIIS, 1970. pp. 4-43. (in Russian)

24. Pulyayev I.S., Pulyayev S.M. K voprosu o maksimal’noy temperature osnovaniya, pri kotoroy dopuskayetsya ukladka betonnoy smesi pri vozvedenii transportnykh sooruzheniy [To the question of the maximum temperature of the substrate, at which it is allowed to lay a concrete mixture in the construction of transport facilities]. Vestnik MGSU, 2011, no 2, pp. 295-304. (in Russian)

25. Korotin V.N. Konstruktivno - tekhnologicheskiye osobennosti sooruzheniya monolitnykh prolotnykh stroyeniy estakady [Structurally - technological features of the construction of monolithic bridge structures of the flyover]. Vestnik mostostroyeniya, 2002, no 3-4, pp. 3-8. (in Russian)

26. Passek V.V., Solov’yanchik A.R. Metodika issledovaniy temperaturnogo rezhima balok prolotnykh stroyeniy mostov v protsesse teplovlazhnostnoy obrabotki [Technique for studying the temperature conditions of the beams of bridge building structures in the process of heat and moisture treatment]. Sbornik nauchnykh trudov TSNIIS Temperaturnyy rezhim i voprosy povysheniya ustoychivosti i dolgovechnosti transportnykh sooruzheniy na BAM. Moscow, TSNIIS, 1980. pp. 97-103. (in Russian)