CALCULATION AND DESIGN OF CELLULAR CARRYING LAYERS OF AIRFIELD RUNWAY PAVEMENTS

Objectives. The need to ensure the reliable functioning of expensive airfield structures poses great challenges for surveyors, designers, builders and operators of these structures. These tasks are complicated by the continuous development of aircraft, an increase in the intensity of their movement, an increase in mass, take-off and landing characteristics of aircraft and the degree of operational impact of aircraft on airfield structures. The aim of the study is the technological solution model proposed by the authors for the carrier layer of artificial runway pavement in the form of a honeycomb structure of closed steel sheets filled with concrete along with a method for assessing the strength and determining the rigidity of its aggregate.

Method. A method is proposed for assessing the ultimate strength and determining the real stiffness parameters of structural layers of a runway with a constructive solution to the question of concrete work in cramped conditions (“cage effect”) from the impact of manifold repeated operational aircraft loads. This method is based on the fundamental principles of the deformation theory of reinforced concrete, developed by V.M. Bondarenko and elaborated in relation to the volumetric stress state of reinforced concrete structures in the works by G.A. Geniev, K.L. Surov and V.I. Rimshin.

Result. An analytical dependency is obtained for establishing a discrete value, a generalised (integral) parameter of the material deformation of the carrier layer, i.e. the equation of the mechanical state of steel-reinforced concrete in a complex stress state, as well as the repeated application of an operational aircraft load at an arbitrary stress point of the artificial runway pavement taking into account the influence of changes in strength, reinforcement, temperature, humidity and rheological factors.

Conclusion. The introduction of new technological principles for reinforcing and concrete laying into the design solutions of the bearing layers of artificial runway pavement allows their bearing capacity and rigidity to be significantly increased due to the redistribution of impact energy and the efficient use of the properties of structural materials during loading. 

1. Zhestkiye pokrytiya aerodromov i avtomobil'nykh dorog /G.I. Glushkov, V.F. Babkov, V.Ye. Trigoni i dr. M.: Transport, 1987. — 255 s. [Hard cover airfields and roads / G.I. Glushkov, V.F. Babkov, V.E. Trigoni et al. M .: Transport, 1987 . 255 p. (In Russ)]

2. Bondarenko V.M., Shagin A.L. Raschet effektivnykh mnogokomponentnykh konstruktsiy. - M.: Stroyizdat, 1987. – 175 s. [Bondarenko V.M., Shagin A.L. Calculation of effective multicomponent structures. - M.: Stroyizdat, 1987 . 175 p. (In Russ)]

3. Karpenko N.I. Obshchiye modeli mekhaniki zhelezobetona. – M.: Stroyizdat, 1996. 413 s. [Karpenko N.I. General models of mechanics of reinforced concrete. - M.: Stroyizdat, 1996.413 p. (In Russ)]

4. Geniyev G.A., Kisyuk V.N., Tyupin G.A. Teoriya plastichnosti betona i zhelezobetona. – M.: Stroyi-zdat, 1974. – 316 s. [Genius G.A., Kisyuk V.N., Tyupin G.A. The theory of plasticity of concrete and reinforced concrete. - M.: StroyZdat, 1974. 316 p. (In Russ)]

5. Surov K.L. Teoriya deformirovaniya zhelezobetona pri slozhnykh napryazhennykh sostoyaniyakh. Dokt. diss. – M.: 1984. – 288 s [ Surov K.L. The theory of reinforced concrete deformation under complex stress conditions. Doct. diss. - M .: 1984. 288 p. (In Russ)]

6. Surov K.L., Akayev A.I., Rimshin V.I. K voprosu o raschete prochnosti i zhestkosti stalebetonnykh stanin s uchetom fizicheskoy nelineynosti // Beton i zhelezobeton. – 1996. № 1. s. 24 - 28 [Surov K.L., Akayev A.I., Rimshin V.I. On the issue of calculating the strength and stiffness of steel concrete frames taking into account physical nonlinearity // Concrete and reinforced concrete. 1996. No. 1. p. 24 - 28. (In Russ)]

7. Akayev A.I., Bulgakov A.I. K voprosu o raschete prochnosti po normal'nym secheniyam avariynykh izgibayemykh elementov, usilennykh oboymami // Novoye v raschetakh i proyektirovanii stroitel'nykh konstruktsiy: Materialy regional'noy nauchno-prakticheskoy konferentsii, 29-30 oktyabrya 2009 g. / Makhachkala: Izd-vo DGTU, 2010. s. 50-60. [Akayev A.I., Bulgakov A.I. On the issue of calculating the strength of normal sections of emergency bending elements reinforced with clips // New in the calculations and design of building structures: Materials of the regional scientific and practical conference, October 29-30, 2009 / Makhachkala: Publishing house of DGTU, 2010. p. 50-60. (In Russ)]

8. Amrakhov Z.G, Batdalov M.M., Akayev A.I., Aliyev M.N. Issledovaniye trekhsloynykh plit, soyedi-nennykh razlichnymi svyazyami, na vibratsionnyye vozdeystviya // Novoye v raschetakh i proyektirovanii stroi-tel'nykh konstruktsiy: Materialy regional'noy nauchno-prakticheskoy konferentsii, 29-30 oktyabrya 2009 g. / Makhachkala: Izd-vo DGTU, 2010. s. 137-140. [Amrakhov Z.G., Batdalov M.M., Akayev A.I., Aliev M.N. The study of three-layer plates connected by various bonds on vibrational effects // New in the calculations and design of building structures: Materials of the regional scientific and practical conference, October 29-30, 2009 / Makhachkala: Publishing house of DGTU, 2010. Pp. 137-140. (In Russ)]

9. Murtazaliyev G.M., Payzulayev M.M. Metody teorii katastrof v mekhanike konstruktsiy // Teoriya sooruzheniy: dostizheniya i problemy: sb. statey po materialam II vserossiyskoy nauchno-prakticheskoy konferentsii, 27-28 noyabrya 2015 g. Makhachkala / Makhachkala: Izd-vo DGTU, 2015. s. 5-14. [Murtazaliev G.M., Payzulaev M.M. Methods of the theory of disasters in the mechanics of structures // Theory of structures: achievements and problems: collection. articles on the materials of the II All-Russian scientific-practical conference, November 27-28, 2015. Makhachkala / Makhachkala: Publishing house of the DSTU, 2015. pp. 5-14. (In Russ)]

10. Akayev A. I., Payzulayev M. M. Ispol'zovaniye funktsii napryazheniy ploskoy zadachi teorii upru-gosti dlya otsenki napryazhennogo sostoyaniya mnogokomponentnykh balok // Teoriya sooruzheniy: dostizheniya i problemy: sb. statey po materialam II vserossiyskoy nauchno-prakticheskoy konferentsii, 27-28 noyabrya 2015 g. Makhachkala / Makhachkala: Izd-vo DGTU, 2015. s. 134-138. [Akayev A. I., Payzulaev M. M. Using the stress function of the plane problem of the theory of elasticity to assess the stress state of multicomponent beams // Theory of constructions: achievements and problems: collection of works. articles on the materials of the II All-Russian scientific-practical conference, November 27-28, 2015. Makhachkala / Makhachkala: Publishing house of the DSTU, 2015. p. 134-138. (In Russ)]

11. Akayev A.I., Payzulayev M.M. Raschet prochnosti po pervoy gruppe predel'nykh sostoyaniy izgiba-yemykh elementov, usilennykh stal'nymi oboymami // Zhurnal «Nauchnoye obozreniye». – Moskva, 2015. №9. s. 112-115. [Akayev A.I., Payzulaev M.M. Strength calculation for the first group of limiting states of bending elements reinforced with steel clips // Journal "Scientific Review". - Moscow, 2015. No. 9. Pp. 112-115. (In Russ)]

12. Krasinikova N.M., Morozov I.M., Khokhryakov O.V., Khozin V.G. Optimizatsiya sostava tsementnogobetona dlya aerodromnykh pokrytiy // Izvestiya kazanskogo gosudarstvennogo arkhitekturno stroitel'nogo universiteta. 2014. № 2. S. 166-172 [Krasinikova N.M., Morozov I.M., Khokhryakov O.V., Khozin V.G. Optimization of the composition of cement-concrete for airfield coatings // News of Kazan State University of Architecture and Civil Engineering. 2014. No. 2. pp. 166-172. (In Russ)]

13. Yakupov M.I., Morozov N.M., Borovskikh I.V., Khozin V.G. Modifitsirovannyy melkozernistyy beton dlya vozvedeniya monolitnykh pokrytiy vzletnoposadochnykh polos aerodromov // Izvestiya kazanskogo gosudarstvennogo arkhitekturno stroitel'nogo universiteta. 2013. № 4 (26). S. 257-261. [Yakupov M.I., Morozov N.M., Borovskikh I.V., Khozin V.G. Modified fine-grained concrete for the construction of monolithic coatings of runways of airfields // News of Kazan State University of Architecture and Civil Engineering. 2013. No. 4 (26). pp. 257-261. (In Russ)]

14. Ovchinnikov I.G., Popov A.N., Masalykin A.N. Napryazhenno-deformirovannoye sostoyaniye sbor-nykh aerodromnykh pokrytiy, usilennykh asfal'tobetonom v model'nom predstavlenii // Internet-zhurnal naukovedeniye. 2016. № 1 (32). S. 28. [Ovchinnikov I.G., Popov A.N., Masalykin A.N. The stress-strain state of prefabricated airfield coatings reinforced with asphalt in a model representation // Internet Journal of Science of Science. 2016. No. 1 (32). pp. 28. (In Russ)]

15. Sklyarov A.N. Analiz kharaktera silovoy nagruzki vozdushnykh sudov pri sovershenii vzletnopo-sadochnykh operatsiy i yego uchet pri ekspluatatsii aerodromnykh pokrytiy // Sovremennyye tendentsii razvi-tiya nauki i tekhnologiy. 2015. № 2 (8). S. 104-108. [Sklyarov A.N. Analysis of the nature of the power load of aircraft during takeoff and landing operations and its accounting for the operation of airfield coatings // Modern Trends in the Development of Science and Technology. 2015. No. 2 (8). pp. 104-108. (In Russ)]

16. Villarreal J., Hossain M. Condition Evaluation of General Aviation Airport Runway Pavements. Airfield and highway pavements 2015: innovative and costeffective pavements for a sustainable future. 2015. No. 2. pp. 572-580.

17. Ziari H.A., Hayati P.A., Sobhani J.B. Air-Entrained Air Field Self-Consolidating Concrete Pavements: Strength and Durability. International Journal of Civil Engineering. 2017.No. 15 (1). pp. 21-33.

18. Sushovan D., Padade A.H., Chaudhury N.N., Mandal J.N. Design Charts for Flexible Airfield Pavement Based on Analytical Study. Transportation Research Procedia. 2016.No. 17. pp. 155–163.