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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Rational distribution of slab stiffness along the height of building with account for shear deformation

Vestnik MGSU 11/2013
  • Tamrazyan Ashot Georgievich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Professor, full member, Russian Engineering Academy, head of the directorate, 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 .
  • Filimonova Ekaterina Aleksandrovna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Re- inforced Concrete and Masonry Structures, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 84-90

Currently, great attention is paid to the choice of optimal and rational design and construction solutions for individual structures and buildings in general. In the process of design not only constructive solution of an element is important, but also its location in the design scheme of the building. It is known that the correct consideration of the elements interaction in the design scheme contributes significantly to the rigidity and strength of multi-storey buildings.Slabs are involved in bending and shear and act like keys between the vertical elements. In order to reduce shear deformations and enhance overall stability of the building it is possible to increase the size of the keys, that means, to increase the height of a slab. In is necessary to determine the area that has the most significant impact on the rigidity and stability of the frame.For deciding that issue a computer model of 25-storey building was built. Settlement scheme was used to estimate the strength, deformability and stability of the frame.Basing on the models stability assessment it is suggested that the most efficient design solution is the floor slabs strengthening in the middle tier of the building by 0.4-0.5 heights of the building.

DOI: 10.22227/1997-0935.2013.11.84-90

References
  1. Sahab M.G., Ashour A.F., Toropov V.V. Cost Optimization of Reinforced Concrete Flat Slab Buildings. Engineering Structures. 2005, vol. 27, no. 3, pp. 313—322.
  2. Wust J., Wagner W. Systematic Prediction of Yield-Line Configurations for Arbitrary Polygonal Plates. Karlsruhe: Baustatik, 2007, 24 p.
  3. Malkov V.P., Kisilev V.G., Sergeev S.A. Optimizatsiya po masse prostranstvennykh ramnykh konstruktsiy s var'iruemymi tolshchinami poperechnykh secheniy s uchetom ogranicheniy po ustalostnoy dolgovechnosti [Optimization of Three Dimensional Frame Structures with the Variable Cross Section Thicknesses in Respect of their Mass Considering Restrictions of Fatigue Life]. Prikladnaya mekhanika i tekhnologiya mashinostroeniya: sbornik nauchnykh trudov [Applied Mechanics and Mechanical Engineering: Collection of Scientific Works]. Nizhniy Novgorod, 1997, pp. 77—97.
  4. Salamakhin P.M. Kontseptsiya avtomatizatsii proektirovaniya i optimizatsii konstruktsiy mostov [The Concept of Design Automation and Optimization of Bridge Construction]. Nauka i tekhnika v dorozhnoy otrasli [Science and Techniques in Road Sector]. 2005, no. 2(33), pp. 11—14.
  5. Serpik I.N., Mironenko I.V. Optimizatsiya zhelezobetonnykh ram s uchetom mnogovariantnosti nagruzheniya [Optimization of Reinforced Concrete Frames with Account for Multivariability of Loadings]. Stroitel'stvo i rekonstruktsiya [Construction and Reconstruction]. 2012, no. 1, pp. 33—39.
  6. Tamrazyan A.G., Filimonova E.A. Metod poiska rezerva nesushchey sposobnosti zhelezobetonnykh plit [Searching Method for Reserve of Load-bearing Capacity of Reinforced Concrete Slabs]. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering]. 2011, no. 3, pp. 23—25.
  7. Klyueva N.V., Vetrova O.A. K otsenke zhivuchesti zhelezobetonnykh ramno-sterzhnevykh konstruktivnykh sistem pri vnezapnykh zaproektnykh vozdeystviyakh [Assesment of the Life of Reinforced Concrete Frame Construction Systems in Case of Unexpected Impacts beyond Design]. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering]. 2006, no. 11, pp. 56—57.
  8. Kovalevich O.M. K voprosu o vybore optimal'nykh zatrat na upravlenie riskom pri chrezvychaynykh situatsiyakh [On the Problem of Choosing Economic Costs for Risk Managment in Case of Emergency Situations]. Problemy bezopasnosti pri chrezvychaynykh situatsiyakh [Security Issues in Emergency Situations]. 2001, no. 2, pp. 27—41.
  9. Gorodetskiy A.S., Evzerov I.D. Komp'yuternye modeli konstruktsiy [Computer Models of Structures]. Kiev, Fakt Publ., 2005, 344 p.
  10. Simbirkin V.N. Proektirovanie zhelezobetonnykh karkasov mnogoetazhnykh zdaniy s pomoshch'yu PK STAR ES [Designing Reinforced Concrete Frameworks for Multi-storey Buildings Using Software STAR ES]. Informatsionnyy vestnik Mosoblgosekspertizy [Informational Proceedings of Moscow Regional State Expertise]. 2005, no. 3(10), pp. 42—28.

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The experience of strengthening reinforced concrete frame by flat capitals, installed on the top of slabs

Vestnik MGSU 4/2015
  • Lyudkovskiy Andrey Mikhaylovich - LLC Scientific Production Center “Reconstruction” Candidate of Technical Sciences, director, LLC Scientific Production Center “Reconstruction”, 1 Avtozavodskaya str., Moscow, 115280, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 80-89

The investigations were conducted of the nodes of reinforced concrete frame after increasing loads. The floor slabs in areas of bearing on the columns were reinforced by upper flat capitals. After the completion of construction works the nodes were tested in construction conditions by test loads exceeding the designed ones. The deflections were measured, disclosure of cracks was recorded in the process of loading. The tests have shown high efficiency of the applied design solutions. The calculations were conducted on the example of reinforced concrete frame of a residential building, the designed loads on which were increased from 9.8 up to 14.0 kPa after completion of construction. Basing on the calculations it was needed to reinforce the nods of slabs’ bearing on the columns, in which there already appeared cracks on the upper surfaces of slabs. It was decided to strengthen the bearing nodes by metal capitals and reinforced concrete footings. The foundations and columns of the building possessed sufficient reserves of bearing capacity.

DOI: 10.22227/1997-0935.2015.4.80-89

References
  1. Kudryashov C.Yu., Lyudkovskiy A.M. Opyt usileniya plity pokrytiya podzemnoy avtostoyanki armirovannoy nabetonkoy [Experience of Strengthening a Floor Slab of Underground Parking by Reinforced Concrete Footings]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2011, no. 1, pp. 13—16. (In Russian)
  2. Zolotukhin Yu.D., Barbakadze V.Sh., Gerasimov I.D., Strabakhin N.I. Ispytanie sooruzheniy : spravochnoe posobie [Testing Structures. Reference Book]. Minsk, Vysheyshaya shkola Publ., 1992, 272 p. (In Russian)
  3. Avdeychikov G.V. Ispytanie stroitel’nykh konstruktsiy [Testing Building Structures]. Moscow, ASV Publ., 2009, 160 p. (In Russian)
  4. Lyudkovskiy A.M. O modelirovanii raboty massivnykh zhelezobetonnykh elementov AES pri deystvii kontsentrirovannykh nagruzok [On Modeling Massive Concrete Elements Operation of NPP under the Action of Concentrated Loads]. Voprosy atomnoy nauki i tekhniki. Seriya: Proektirovanie i stroitel’stvo [Problems of Nuclear Science and Technology. Series: Design and Construction]. 1986, no. 3. (In Russian)
  5. Bolgov A.N., Sokurov A.Z., Alekseenko D.V. Prodavlivanie kraynikh uzlov sopryazheniya plita — kolonna, usilennykh vkleennoy poperechnoy armaturoy [Punching of the Hips of the Junctions Slab — Column Reinforced by Glued Transverse Reinforcement]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2013, no. 3, pp. 11—14. (In Russian)
  6. Bolgov A.N., Sokurov A.Z., Alekseenko D.V. Prodavlivanie promezhutochnykh uzlov sopryazheniya plita — kolonna, usilennykh vkleennoy poperechnoy armaturoy [Punching of the Intermediate Nodes of the Junctions Slab — Column Reinforced by Glued Transverse Reinforcement]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2014, no. 3, pp. 10—14. (In Russian)
  7. GOST 17624—87. Betony. Ul’trazvukovoy metod opredeleniya prochnosti [Russian State Standard GOST 17624—87. Concretes. Ultrasound Method of Strength Determination]. Elektronnyy fond pravovoy i normativno-tekhnicheskoy dokumentatsii [Electronic Fund of Legislative and Normative-Technical Documentation]. Available at: http://docs.cntd.ru/document/gost-17624-87. Date of access: 05.03.2015. (In Russian)
  8. GOST 22690—88. Betony. Opredelenie prochnosti mekhanicheskimi metodami nerazrushayushchego kontrolya [Russian State Standard GOST 22690—88. Concretes. Determining the Strength by Mechanical Methods of Undischatged Control]. Elektronnyy fond pravovoy i normativno-tekhnicheskoy dokumentatsii [Electronic Fund of Legislative and Normative-Technical Documentation]. Available at: http://docs.cntd.ru/document/gost-22690-88. Date of access: 05.03.2015. (In Russian)
  9. Tikhonov I.N. Armirovanie elementov i monolitnykh zhelezobetonnykh zdaniy : Posobie po proektirovaniyu [Reinforcement of the Elements and Monolithic Reinforced Concrete Buildings : Manual on Design]. Moscow, FGUP TsPP Publ., 2007, 170 p. (In Russian)
  10. Kapilovskiy V.S., Kriksunov A.Z., Malyarenko A.A., Perel’muter A.V., Perel’muter M.A. SCAD Office. Vychislitel’nyy kompleks SCAD [SCAD Office. Computing System SCAD]. Moscow, SKAD SOFT Publ., 2007, 592 p. (In Russian)
  11. Gvozdev A.A., Baykov V.N. K voprosu o povedenii zhelezobetonnykh konstruktsiy v stadii blizkoy k razrusheniyu [On the Question of Reinforced Concrete Structures Operation in a Stage Close to Destruction]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1977, no. 9, pp. 22—24. (In Russian)
  12. Maniskevich E.S., Morozenskiy V.L., Pyzhov Yu.K. Prochnost’ na prodavlivanie opornykh zon perekrytiy, vozvodimykh metodom pod”ema [Punching Shear Strength of the Support Zones of the Slabs, Constructed by the Method of Lifting]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1982, no. 4, pp. 21—22. (In Russian)
  13. SNiP 2.01.07—85. Nagruzki i vozdeystviya [Construction Norms SNiP 2.01.07—85. Loads and Impacts]. Elektronnaya biblioteka dokumentov [Electronic Library of Documents]. Available at: http://focdoc.ru/down/o-1842.html. Date of access: 05.03.2015. (In Russian)
  14. SP 20.13330.2011. Nagruzki i vozdeystviya. Aktualizirovannaya redaktsiya SNiP 2.01.07—85* [Requirements SP 20.13330.2011. Loads and Impacts. Revised Edition of Construction Norms SNiP 2.01.07—85*]. Elektronnyy fond pravovoy i normativno-tekhnicheskoy dokumentatsii [Electronic Fund of Legislative and Normative-Technical Documentation]. Available at: http://docs.cntd.ru/document/1200084848. Date of access: 05.03.2015. (In Russian)
  15. SP 52-101—2003. Betonnye i zhelezobetonnye konstruktsii bez predvaritel’nogo napryazheniya armatury [Requirements SP 52-101—2003. Concrete and Reinforced Concrete Structures without Prestress of Reinforcement]. Elektronnyy fond pravovoy i normativno-tekhnicheskoy dokumentatsii [Electronic Fund of Legislative and Normative-Technical Documentation]. Available at: http://docs.cntd.ru/document/1200037361. Date of access: 05.03.2015. (In Russian)

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