DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Determination of heat losses of a window frame to the wall joint when replacing the outdated constructions of window blocks with modern ones

Vestnik MGSU 11/2015
  • Bedov Anatoliy Ivanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Professor, Department of Reinforced Concrete and Masonry Structures, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Gaysin Askar Miniyarovich - Ufa State Petroleum Technological University (USPTU) Candidate of Technical Sciences, Associate Professor, Department of Building Structures, Ufa State Petroleum Technological University (USPTU), Office 225, 195, Mendeleeva St., Ufa, 450062, Russian Federation.
  • Gabitov Azat Ismagilovich - Ufa State Petroleum Technological University (USPTU) Doctor of Technical Sciences, Professor, Department of Building Structures, Ufa State Petroleum Technological University (USPTU), 195 Mendeleeva str., Ufa, 450062, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Galeev Rinat Grigor’evich - Ufa State Petroleum Technological University (USPTU) Candidate of Technical Sciences, Associate Professor, Department of Highways and Technology of Construction Production, Ufa State Petroleum Technological University (USPTU), 195 Mendeleeva str., Ufa, 450062, Russian Federation.
  • Salov Aleksandr Sergeevich - Ufa State Petroleum Technological University (USPTU) Candidate of Technical Sciences, Associate Professor, Department of Highways and Technology of Construction Production, Ufa State Petroleum Technological University (USPTU), 195 Mendeleeva str., Ufa, 450062, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shibirkina Marina Sergeevna - Ufa State Petroleum Technological University (USPTU) engineer, Department of Highways and Technology of Construction Production, Ufa State Petroleum Technological University (USPTU), 195 Mendeleeva str., Ufa, 450062, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 46-57

In the Soviet Union a lot of residential buildings with wooden window systems were built. In the last 15 years the requirements to heat protection of buildings have strengthened and the technologies of window systems production have developed. New window constructions appeared, in which window frames of PVC profiles are used. So now double-casement windows with glass are replaced by single-casement with glass units. The replacement of windows is associated with a number of specific problems. The authors analyzed the quantitative parameters of the heat losses in the claddings of brick buildings. It was revealed that significant heat leakage occurs in the joint areas of window frame with the wall, at the junction of slopes. The authors offer a quantitative calculation of heat losses in these units in case of two-dimensional heat flux based on thermal conductivity matrix taking into account the convective heat transfer. On the basis of this calculation a computer program was developed that allows pinpointing the most problematic areas for choosing rational actions for elimination of cold bridges.

DOI: 10.22227/1997-0935.2015.11.46-57

References
  1. Boriskina I.V., Shvedov N.V., Plotnikov A.A. Sovremennye svetoprozrachnye konstruktsii grazhdanskikh zdaniy [Modern Translucent Constructions of Civil Buildings]. Saint Petersburg, NIUPTs «Mezhregional’nyy institut okna» Publ., 2005, vol. 1. Osnovy proektirovaniya [Fundamentals of the Design]. 160 p. (In Russian)
  2. Babkov V.V., Gaysin A.M., Fedortsev I.V., Sinitsin D.A., Kuznetsov D.V., Naftulovich I.M., Kil’dibaev R.S., Kolesnik G.S., Karanaeva R.Z., Savateev E.B., Dolgodvorov V.A., Gusel’nikova N.E., Gareev P.P. Teploeffektivnye konstruktsii naruzhnykh sten zdaniy, primenyaemye v praktike proektirovaniya i stroitel’stva respubliki Bashkortostan [Thermal Efficiency of External Walls of Buildings Used in the Practice of Design and Construction in the Republic of Bashkortostan]. Stroitel’nye materialy [Construction Materials]. 2006, no. 5, pp. 43—46. (In Russian)
  3. Gaysin A.M., Gareev R.R., Babkov V.V., Nedoseko I.V., Samokhodova S.Yu. Dvadtsatiletniy opyt primeneniya vysokopustotnykh vibropressovannykh betonnykh blokov v Bashkortostane [Twenty Years Experience of Applying High-Hollow Vibrocompressed Concrete Blocks in Bashkortostan]. Stroitel’nye materialy [Construction Materials]. 2015, no. 4, pp. 82—86. (In Russian)
  4. Bedov A.I., Babkov V.V., Gabitov A.I., Gajsin A.M., Rezvov O.A., Kuznecov D.V., Gafurova Je.A., Sinicin D.A. Konstruktivnye reshenija i osobennosti rascheta teplozaschity naruzhnyh sten zdanij na osnove avtoklavnyh gazobetonnyh blokov [Structural Solutions and Special Features of the Thermal Protection Analysis of Exterior Walls of Buildings Made of Autoclaved Gas-Concrete Blocks]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 2, pp. 98—103. (In Russian)
  5. Babkov V.V., Gaysin A.M., Arkhipov V.G., Naftulovich I.M., Gareev R.R., Moskalev A.P., Kolesnik G.S. Mnogoetazhnye oblitsovki v konstruktsiyakh naruzhnykh teploeffektivnykh trekhsloynykh sten zdaniy [Multi-storey Veneer at the Exterior Thermal Efficient Three-Layer Walls of Buildings]. Stroitel’nye materialy [Construction Materials]. 2003, no. 10, pp. 10—13. (In Russian)
  6. Samarin O.D. Osnovy obespecheniya mikroklimata zdaniy [Bases of Maintenance of Microclimate in Buildings]. Moscow, ASV Publ., 2014, 208 p. (In Russian)
  7. Nedoseko I.V., Pudovkin A.N., Kuz’min V.V., Aliev R.R. Keramzitobeton v zhilishchno-grazhdanskom stroitel’stve v Respublike Bashkortostan. Problemy i perspektivy [Claydite-concrete in Civil Engineering in the Republic of Bashkortostan. Problems and Prospects]. Zhilishchnoe stroitel’stvo [Housing Construction]. 2015, no. 4, pp. 16—20. (In Russian)
  8. Rakhmankulov D.L., Gabitov A.I., Abdrakhimov R.R., Gaysin A.M., Gabitov A.A. Iz istorii razvitiya kontrolya kachestva materialov i tekhnologiy [From the History of Quality Control Development of Materials and Technologies]. Bashkirskiy khimicheskiy zhurnal [Bashkir Chemical Journal]. 2006, vol. 13, no. 5, pp. 93—95. (In Russian)
  9. Samarin V.S., Babkov V.V., Gaysin A.M., Egorkin N.S. Perspektivy krupnopanel’nogo domostroeniya v Respublike Bashkortostan [The Prospects of Large-Panel Housing Construction in the Republic Bashkortostan]. Zhilishchnoe stroitel’stvo [Housing Construction]. 2011, no. 3, pp. 12—14. (In Russian)
  10. Shagmanov R.R., Shibirkina M.S. Raschet teplozashchitnykh kharakteristik okon [Calculation of Thermal Properties of Windows]. Problemy stroitel’nogo kompleksa Rossii : materialy XIKh Mezhdunarodnoy nauchno-tekhnicheckoy konferentsii (g. Ufa, 10—12 marta 2015 g.)[The Problems of the Construction Complex of Russia : Materials of the 19th International Scientific-Technical Conference, 10—12 March 2015]. Ufa, 2015, pp. 90—92. (In Russian)
  11. Gagarin V.G., Kozlov V.V. Teoreticheskie predposylki rascheta privedennogo soprotivleniya teploperedache ograzhdayushchikh konstruktsiy [Theoretical Background the Calculation of Reduced Resistance to Heat Transfer of Enclosing Structures]. Stroitel’nye materialy [Construction Materials]. 2010, no. 12, pp. 4—12. (In Russian)
  12. Bedov A.I., Balakshin A.S., Voronov A.A. Prichiny avariynykh situatsiy v ograzhdayushchikh konstruktsiyakh iz kamennoy kladki mnogosloynykh sistem v mnogoetazhnykh zhilykh zdaniyakh [The Causes of Emergencies in Building Constructions of Stone Clad Systems in High-Rise Residential Buildings]. Stroitel’stvo i rekonstruktsiya [Construction and Reconstruction]. 2014, no. 6 (56), pp. 11—17. (In Russian)
  13. Mirsaev R.N, Babkov V.V., Nedoseko I.V., Yunusova S.S., Pechenkina T.V., Krasnogorov M.I. Opyt proizvodstva i ekspluatatsii gipsovykh stenovykh izdeliy [Experience of Production and Operation of Gypsum Wall Products]. Stroitel’nye materialy [Construction Materials]. 2008, no. 3, pp. 78—80. (In Russian)
  14. Nedoseko I.V., Ishmatov F.I., Aliev R.R. Primenenie konstruktsionno-teploizolyatsionnogo keramzitobetona v nesushchikh i ograzhdayushchikh konstruktsiyakh zdaniy zhilishchno-grazhdanskogo naznacheniya [Application of Structural Insulating Concrete in Load-Bearing and Enclosing Structures of Buildings of Housing and Civil Purposes]. Stroitel’nye materialy [Construction Materials]. 2011, no. 7, pp. 14—17. (In Russian)
  15. Norrie D.H., de Vries G. Vvedenie v metod konechnykh elementov [An Introduction to Finite Element]. Russian translation. Moscow, Mir Publ., 1981, 304 p. (In Russian)
  16. Salov A.S. Raschet optimal’nogo variantnogo secheniya i variantnogo armirovaniya izgibaemogo zhelezobetonnogo elementa po kriteriyu snizheniya materialoemkosti i ratsional’nogo sochetaniya klassov betona i armatury: Svidetel’stvo o gosudarstvennoy registratsii programmy dlya EVM № 2011613598; pravoobladatel’ GOU VPO UGNTU ; zayavl. 21.03.2011 ; zareg. 05.05.2011 [Calculation of Optimal Variant and Variant-Sectional Reinforcement of Flexible Reinforced Concrete Element According to the Criterion of Reducing the Consumption of Materials and a Rational Combination of Classes of Concrete and Reinforcement: the Certificate of State Registration of Computer Programs no. 2011613598; the patent holder GOU VPO UGNTU; registered 05.05.2011]. (In Russian)
  17. Lukashevich A.A. Postroenie i realizatsiya skhem pryamogo metoda konechnykh elementov dlya resheniya kontaktnykh zadach [The Design and Implementation of Schemes of Direct Finite Element Method for the Solution of Contact Problems]. Izvestiya vysshikh uchebnykh zavedeniy. Stroitel’stvo [News of Higher Educational Institutions. Construction]. 2007, no. 12, pp. 18—23. (In Russian)
  18. Shoykhet B.M. Struktura i pronitsaemost’ voloknistykh teploizolyatsionnykh materialov [Structure and Permeability of Fibrous Heat-Insulating Materials]. Tekhnologii stroitel’stva [Technologies of Construction]. 2008, no. 7, pp. 96—98. (In Russian)
  19. Umnyakova N.P., Butovskiy I.N., Chebotarev A.G. Razvitie metodov normirovaniya teplozashchity energoeffektivnykh zdaniy [Development of the Methods for Measurement of Thermal Insulation of Energy Efficient Buildings]. Zhilishchnoe stroitel’stvo [Housing Construction]. 2014, no. 7, pp. 19—23. (In Russian)
  20. Khayrullin V.A., Shibirkina M.S. Gosudarstvennoe regulirovanie kachestva konechnoy stroitel’noy produktsii [State Regulation of the Quality of the Final Construction Products]. Evraziyskiy yuridicheskiy zhurnal [Eurasian Law Journal]. 2014, no. 9 (76), pp. 204—205. (In Russian)
  21. Korchagin P.V. Vybor setki v metode konechnykh elementov dlya rascheta potoka veshchestva cherez granitsu pri reshenii zadachi perenosa [Choice of Mesh in the Finite Element Method to Calculate the Flux of Matter through the Boundary When Solving Transfer Problems]. Izvestiya vysshikh uchebnykh zavedeniy. Severo-Kavkazskiy region. Seriya: Estestvennye nauki. Prilozhenie [University News. North-Caucasian Region. Natural Sciences Series. Appendix]. 2004, no. S2, pp. 72—74. (In Russian)
  22. Reddy J.N. An Introduction to Nonlinear Finite Element Analysis. Oxford, Oxford University Press, 2004, 488 p.
  23. Rombach G.A. Finite Element Design of Concrete Structures : Practical Problems and Their Solutions. London, Thomas Telford Publishing, 2004, 300 p.
  24. Thomas J. R. Hughes. The Finite Element Method: Linear Static and Dynamic Finite Element Analysis. New York, Dover Publications, 2000, 704 p.
  25. Sharafutdinova M.V., Usmanova D.Z., Salov A.S. Monitoring tekhnicheskogo sostoyaniya ekspluatiruemykh ob”ektov, raspolozhennykh vblizi stroitel’noy ploshchadki [Monitoring of Technical State of Operating Facilities Located Near Construction Site]. 63-ya nauchno-tekhnicheskaya konferentsiya studentov, aspirantov i molodykh uchenykh UGNTU : sbornik materialov konferentsii [63-th Scientific and Technical Conference of Students, Postgraduates and Young Scientists of USPTU: Proceedings of the Conference]. Ufa, UGNTU Publ., 2012, book 3, pp. 150—153. (In Russian)
  26. Karanaeva R.Z., Babkov V.V., Kolesnik G.S., Sinitsin D.A. Rabota penopolistirola v sostave teploeffektivnykh naruzhnykh sten zdaniy po sisteme fasadnoy teploizolyatsii [Operation of EPS in the Composition of Thermal Efficient External Walls of Buildings According to the System of Facade Heat Insulation]. Zhilishchnoe stroitel’stvo [Housing Construction]. 2009, no. 8, pp. 26—29. (In Russian)

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STATIONARY PROBLEM OF MOISTURE-INDUCED ELASTICITY OF HETEROGENEOUS THICK-WALLED CYLINDERS

Vestnik MGSU 10/2012
  • Andreev Vladimir Igorevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, corresponding member of Russian Academy of Architecture and Construction Sciences, chair, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Aversh'ev Anatoliy Sergeevich - Moscow State University of Civil Engineering (MSUCE) master student, Institute of Fundamental Educatio, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 56 - 61

Many problems of identification of the stress-strain state against the background of the heat and mass transfer are solved through the application of constant (averaged) values of mechanical properties (elastic modulus, Poisson's ratio) and derivation of differential equations with constant coefficients. Due to irregular distribution of temperature and other factors of impact, including the moisture content, mechanical properties of many materials change significantly; therefore, the problems in question are solved within the framework of mechanics of heterogeneous bodies.
In this paper, the authors solve the classical problem of the steady-state moisture-induced elasticity of a thick-walled cylinder by taking account of the changes in the value of the elastic modulus caused by the influence of moisture. In this case, the problem is reduced to a differential equation with variable coefficients, which makes the solution more complicated though more accurate. It is proven that due regard for the heterogeneity leads to a significant increase in stresses, if compared to the solution based on the mean values of the modulus of elasticity.

DOI: 10.22227/1997-0935.2012.10.56 - 61

References
  1. Abelev M.Yu. Stroitel’stvo promyshlennykh i grazhdanskikh zdaniy na vodonasyshchennykh gruntakh [Construction of Industrial and Civil Buildings on Saturated Soil]. Moscow, 1982, 247 p.
  2. Vyalov S.S. Reologicheskie osnovy mekhaniki gruntov [Rheological Fundamentals of Soil Mechanics]. Moscow, Vyssh. shk. publ., 1976, 447 p.
  3. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2005, 488 p.
  4. Andreev V.I. Nekotorye zadachi i metody mekhaniki neodnorodnykh tel [Some Problems and Methods of Mechanics of Heterogeneous Bodies]. Moscow, ASV Publ., 2002, 288 p.
  5. Andreev V.I., Potekhin I.A. Optimizatsiya po prochnosti tolstostennykh obolochek [Optimization of Strength of Thick-walled Envelopes]. Moscow, MGSU Publ., 2011, 86 p.
  6. Andreev V.I. Metod resheniya nekotorogo klassa trekhmernykh zadach dlya uprugogo radial’no neodnorodnogo tsilindra [Method of Resolving a Class of Three-dimensional Problems for an Elastic Radial Heterogeneous Cylinder]. Izvestiya vuzov. Stroitel’stvo i arkhitektura. [News of Institutions of Higher Education. Construction and Architecture]. 1985, no. 8, pp. 28—31.
  7. Andreev V.I. Priblizhennyy metod resheniya smeshannoy kraevoy zadachi dlya neodnorodnogo tsilindra [Approximate Method of Resolving the Mixed Boundary Value Problem for a Heterogeneous Cylinder]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Analysis of Structures]. 1989, no. 2, pp. 8—11.
  8. Andreev V.I., Frolova I.I. Temperaturnye napryazheniya v neodnorodnom massive so sfericheskoy polost’yu [Thermal Stresses in a Heterogeneous Body with a Spherical Cavity]. Collected works of Higher School of Engineering. Poland, Opole, 1991, pp. 14—18.
  9. Davydov V.A. Osobennosti izyskaniy i proektirovaniya avtomobil’nykh dorog v rayonakh vechnoy merzloty [Peculiarities of Surveys and Design of Motor Roads in Permafrost Areas]. Omsk, Omskiy PI Publ., 1979, pp. 44—56.
  10. ODN 218.046—01. Proektirovanie nezhestkikh dorozhnykh odezhd [Design of Non-rigid Road Pavements]. 2000, 93 p.

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Stress-strain state of fiberglass in conditions of climatic aging

Vestnik MGSU 12/2018 Volume 13
  • Martynov Gleb V. - Peter the Great St. Petersburg Polytechnic University (SPbPU) undergraduate student, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Polytechnicheskaya st., St. Petersburg, 195251, Russian Federation.
  • Monastyreva Daria E. - Peter the Great St. Petersburg Polytechnic University (SPbPU) undergraduate student, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Polytechnicheskaya st., St. Petersburg, 195251, Russian Federation.
  • Morina Elena A. - Peter the Great St. Petersburg Polytechnic University (SPbPU) undergraduate student, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Polytechnicheskaya st., St. Petersburg, 195251, Russian Federation.
  • Makarov Aleksey I. - Peter the Great St. Petersburg Polytechnic University (SPbPU) undergraduate student, Peter the Great St. Petersburg Polytechnic University (SPbPU), 29 Polytechnicheskaya st., St. Petersburg, 195251, Russian Federation.

Pages 1509-1523

Introduction. Were investigated samples of fiberglass with the aim of its effective use in construction in the long term. Fiberglass is considered one of the most versatile and durable materials among polymer composite materials, however, and it is subject to destruction. It is known that one of the main reasons for reducing the specified characteristics and material properties is operational. At the design stage, it is necessary to determine the most reliable and economical materials used and, accordingly, be sufficiently aware of their strength and durability. Thus, in order to avoid the destruction of the material, as well as significantly enhance and prolong its service life, it is necessary to be aware of how exactly the properties of the material change over time. Regarding reinforced concrete, wood, brick and steel fiberglass is used in construction recently. This means that while the service life of the list of the most common materials in construction is known to a sufficient extent, manufacturers do not dare to use fiberglass as a material for critical structures. This occurs because changes in its characteristics, depending on operational factors, are not sufficiently studied for intervals exceeding 4-5 years of operation. Materials and methods. During the work, samples of fiberglass SPPS with a longitudinal and transverse arrangement of fiberglass were tested for climatic aging in a climatic chamber for 5 cycles simulating 5 years of material operation. All samples were subjected to tensile testing on a tensile testing machine R-5. Results. Destructive stresses were determined, calculations were carried out and elastic and strength characteristics of the samples were analyzed. On the basis of the obtained results, an analysis was carried out, conclusions were formulated about the use of fiberglass in the construction in the long term, as well as the influence of such operational factors as moisture, positive and negative temperatures, and ultraviolet radiation on the properties of fiberglass with a different arrangement of fiberglass. Conclusions. Found that the destructive stresses of fiberglass are significantly reduced during the first two years of operation, which must be considered when choosing fiberglass with the stated characteristics. Ultraviolet does not have a significant effect on the elastic-strength properties of the material, while during operat

DOI: 10.22227/1997-0935.2018.12.1509-1523

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