The reaction of the building structure with window unit to the explosiveimpact on the basis of dynamic equation solution

Vestnik MGSU 1/2014
  • Doronin Fedor Leonidovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Hydraulics and Water Resources, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, 129337, Moscow, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Truchanova Lyudmila Nikolaevna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Associate Pro- fessor, Department of Physics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, 129337, Moscow, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Fomina Marina Vasilyevna - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Physics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, 129337, Moscow, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 33-40

When designing residential buildings, additional measures for increasing the strength at dynamic effects indoors are not foreseen. The walls of the structure fixed in the framework are not designed for shock wave caused by explosion of utility gas. When designing a building, the task of the special dynamic load is often reduced to the calculation of the safe shock pressure, exceeding of which leads to the destruction of the structures. The wall with the window area under dynamic effects is a blast relief panel, which reduces the excess pressure inside the room. The proposed method of calculating a design with a window unit allows determining the dynamic reaction of the wall on explosive pulse. The proposed calculation technique of the constructions at shock loads allows tracing the changes of the inertial forces and displacements at any stage of dynamic response. The reaction to dynamic loads can be also set for non-monolithic structures, consisting of different materials with different conditions of fastening. Elastoplastic reaction of a brick wall with glass units was determined using step-by-step method of linear acceleration. The calculation of stress-strain state of brick walls with window panes determined the strength properties of the structures close to the monolithic version. The proposed technique of numerical solution of dynamic equations is applied only in the analysis of elastic systems, in which the dynamic characteristics remain unchanged throughout the reaction process.

DOI: 10.22227/1997-0935.2014.1.33-40

References
  1. Abrosimov A.A., Komarov A.A. Meropriyatiya, obespechivayushchie bezopasnye nagruzki pri avariynykh vzryvakh v zdaniyakh so vzryvoopasnymi tekhnologiyami [Measures Providing Proof Loads at Accidental Explosions in the Buildings with Explosion Hazardous Technologies]. Seysmostoykoe stroitel'stvo. Bezopasnost' sooruzheniy [Antiseismic Construction. Security of Structures]. 2002, no. 4, pp. 48—51.
  2. Komarov A.A. Razrushenie zdaniy pri avariynykh vzryvakh bytovogo gaza [Destruction of Buildings Subject to Accidental Explosions of the Utility Gas]. Pozharobezopasnost [Fire Safety]. 2004, vol. 13, no. 5, pp. 15—23.
  3. Pilyugin L.P. Obespechenie vzryvoustoychivosti zdaniy s pomoshch'yu predokhranitel'nykh konstruktsiy [Ensuring Blast Resistance of Buildings with the Help of Protecting Structures]. Moscow, Pozhnauka Publ., 2000, 224 p.
  4. Mishuev A.V., Komarov A.A., Khusnutdinov D.Z. Obshchie zakonomernosti razvitiya avariynykh vzryvov i metody snizheniya vzryvnykh nagruzok do bezopasnogo urovnya [Common Patterns of Accidental Explosions Development and Methods of Reducing Explosive Loads up to the Safe Level]. Pozharobezopasnost [Fire Safety]. 2001, vol. 10, no. 6, pp. 8—19.
  5. Komarov A.A. Analiz posledstviy avariynogo vzryva prirodnogo gaza v zhilom dome [The Analysis of the Consequences of Natural Gas Explosions in Residential Building]. Pozharobezopasnost [Fire Safety]. 1999, vol. 8, no. 4, pp. 49—53.
  6. Newmark N.M., Rosenblueth E. Fundamentals of Earthquake Engineering. Prentice-Hall, Inc. Englewood Cliffs, New York, 1971, 344 p.
  7. Ambriashvili Yu.K., Anan'in A.I., Barchenkov A.G. and others. Spravochnik proektirovshchika. Dinamicheskiy raschet spetsial'nykh inzhenernykh sooruzheniy i konstruktsiy [Designer's Guidance. Dynamic Calculation of Special Engineering Structures and Constructions]. Moscow, Stroyizdat Publ., 1986, 462 p.
  8. Clough R.W., Penzien J. Dynamics of Structures. World Book Company, New York, 1977, 320 p.
  9. Korn G.A., Korn T.M. Mathematical Handbook for Scientists and Engineers. Second Edition. Dover, New York, 2000, 943 p.
  10. Doronin F.L., Lyapin A.Yu. Raschet konstruktsiy sooruzheniy na vzryvnuyu nagruzku na osnove chislennogo resheniya uravneniya dvizheniya [Calculation of Building Structures for the Explosive Load Basing on Numerical Solutions of Motion Equation]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 4, pp. 72—78.

Download

The influence of concrete joints on the structural behavior

Vestnik MGSU 3/2014
  • Koyankin Aleksandr Aleksandrovich - Siberian Federal University (SibFU) Candidate of Technical Sciences, Associate Professor, Department of Building Structures and Control Systems, Siberian Federal University (SibFU), 79 Svobodny Avenue, Krasnoyarsk, 660041, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Beletskaya Valeriya Igorevna - Siberian Federal University (SFU) Master Degree student, Department of Engineering Structures and Controlled Systems, Siberian Federal University (SFU), 79 Svobodnyy Prospekt, Krasnoyarsk, 660041, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Guzhevskaya Anastasiya Igorevna - Siberian Federal University (SFU) Master Degree student, Department of Engineering Structures and Controlled Systems, Siberian Federal University (SFU), 79 Svobodnyy Prospekt, Krasnoyarsk, 660041, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 76-81

The buildings made of monolithic reinforced concrete currently enjoy great popularity. Along with a great number of advantages of monolithic building, which are repeatedly listed in the works of many authors, there are many unexplored issues which require detailed consideration. The technological concrete joints are among them. The joints are inevitable in the process of construction of almost any monolithic building and their quality affects the reliability of buildings and structures. Despite regular use of the concept of cold joint and clear instructions in building standards on the technology of joint production, most organizations do not follow the correct technology of concreting the elements. As a result, the strength and stiffness characteristics of the construction deteriorate, because the linkage value of new concrete with the old one is significantly lower than in monolith. In order to conduct experimental studies the reinforced concrete beams of rectangular section were produced. As a result of testing, it was determined that the presence of a concrete joint significantly reduces the stiffness and carrying capacity of the structures. It is confirmed by the fact that the received deflections of solid beams without joint are significantly lower than the deflections of beams with cold joint. It also noted that the deflections of the beams manufactured following the normative technology are lower, than the deflections of the beams, manufactured with violation of the rules. Basing on the obtained results, it was concluded, that more detailed study of the work of a construction with cold joints in concrete is required. The reason for it is in the changing for the worse of the strength and stiffness characteristics of structural element, which is made produced with a joint, while in the process of real designing, the monolith buildings are calculated as solid monolithic, without joints.

DOI: 10.22227/1997-0935.2014.3.76-81

References
  1. Sokolov M.E. Rekomendatsii po ratsional'nomu primeneniyu konstruktsiy iz monolitnogo betona dlya zhilykh i obshchestvennykh zdaniy [Recommendations for Rational Use of the Structures Made of Monolithic Concrete for Residential and Public Buildings]. Moscow, TsNIIEPzh Publ., 1983.
  2. Sigalov E.E., Protasov V.A. K opredeleniyu osrednennoy zhestkosti zhelezobetonnykh vnetsentrenno szhatykh stoek s uchetom treshchin v rastyanutykh zonakh [On the Rigidity Determination of Reinforced Concrete Off-centre Compressed Columns]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1971, no. 2, pp. 34—36.
  3. Popova M.V. Nesushchaya sposobnost' i deformativnost' monolitnykh plit perekrytiy s uchetom obrazovaniya tekhnologicheskikh treshchin [Bearing Capacity and Deformability of Monolithic Floor Slabs with Account for Technological Cracks Formation]. Moscow, 2002, 186 p.
  4. Spaethe G. Die Siclierhcit tragender Baukonstruktionen. 1992, Springer Aufl age, 306 p.
  5. Eisenberger M., Bielak J. Finite Beams on Infi nite Two-parameter Elastic Foundations. Computers & Structures. 1992, vol. 42, no. 4, pp. 661—664. DOI: 10.1016/0045-7949(92)90133-K.
  6. Sokolov M.E. Issledovanie treshchinoobrazovaniya v monolitnykh zdaniyakh [Crack Formation Study in Monolithic Buildings]. Zhilishchnoe stroitel'stvo [Housing Construction]. 1978, no. 8, pp. 11—16.
  7. Gvozdev A.A. Treshchinostoykost' i deformativnost' obychnykh i predvaritel'no napryazhennykh zhelezobetonnykh konstruktsiy [Crack Resistance and Deformability of Usual and Prestressed Concrete Structures]. Moscow, Stroyizdat Publ., 1965.
  8. Gushcha Yu.P. Issledovanie shiriny raskrytiya normal'nykh treshchin [Width Study of Normal Cracks]. Prochnost' i zhestkost' zhelezobetonnykh konstruktsiy [Durability and Rigidity of Reinforced Concrete Structures]. Moscow, Stroyizdat Publ., 1971.
  9. Karpenko N.I. K postroeniyu obshchikh kriteriev deformirovaniya i razrusheniya zhelezobetonnykh elementov [On the Question of Developing General Criteria of Deformation and Destruction of Reinforced Concrete Elements]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2002, no. 6, pp. 20—25.
  10. Razaqpur A., Shah K. Exact Analysis of Beams on Two-parameter Elastic Foundations. International Journal of Solids and Structures. 1991, vol. 27, no. 4, pp. 435—454. DOI: 10.1016/0020-7683(91)90133-Z.
  11. Pishchulev A.A. Sovershenstvovanie rascheta prochnosti normal'nykh secheniy izgibaemykh zhelezobetonnykh konstruktsiy s povrezhdennoy szhatoy zonoy betona [Improvement of Strength Calculation of the Normal Sections of Bending Reinforced Concrete Structures with the Damaged Compressed Concrete Area]. Samara, 2010, 192 p.
  12. Korenev B.G. Voprosy rascheta balok i plit na uprugom osnovanii [Questions of the Calculation of Beams and Slabs on Elastic Foundation]. Moscow, Gosstroyizdat Publ., 1954, 231 p.

Download

EXAMINATION AND TESTING OF CRANE BEAMS OF AN OVERFLOW DAM

Vestnik MGSU 7/2012
  • Kholopov Igor' Serafimovich - Samara State University of Architecture and Civil Engineering (SSUACE) Doctor of Technical Sciences, Professor, Chair, Department of Steel and Timber Structures, +7 (846) 242-50-87, Samara State University of Architecture and Civil Engineering (SSUACE), 194 Molodogvardeyskaya str., Samara, 443001, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Zubkov Vladimir Aleksandrovich - Samara State University of Architecture and Civil Engineering (SSUACE) Candidate of Technical Sciences, Professor, Department of Steel and Timber Structures, +7 (846) 242-50-87, Samara State University of Architecture and Civil Engineering (SSUACE), 194 Molodogvardeyskaya str., Samara, 443001, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Khurtin Vladimir Anatol'evich - Chief Engineer, Zhigulevskaya Hydraulic Power Plant, Branch of RusHydro JSC Chief Engineer, +7 (848) 627-93-50, Chief Engineer, Zhigulevskaya Hydraulic Power Plant, Branch of RusHydro JSC, Zhigulevsk, Samara Region, 445350, Russian Federation.

Pages 114 - 118

The following conclusions were made upon completion of the testing of crane beams:
The lowest rigidity is demonstrated by welded beams exposed to temporary mobile loads; the maximal buckling caused by temporary mobile loads is equal to 12 mm, or 1/1,1790 of the span; the rigidity of crane beams of an overflow dam meets the requirements set by Section E2.1 of Construction Rules 20.13330.2011 "Loads and Actions".
In general, the authors state that the crane beams of the span structure of the overflow dam are in a serviceable operating condition, according to their opinion issued upon completion of examination and testing procedures. The recommendation is to regularly tighten screw nuts and to install high-strength bolts in the points of missing rivets. The authors also recommend applying a rust-proofing coating to all metal structures of the dam spans.

DOI: 10.22227/1997-0935.2012.7.114 - 118

References
  1. Romanov A.A. Zhigulevskaya GES. Ekspluatatsiya gidrotekhnicheskikh sooruzheniy [Zhigulevskaya Hydropower Plant. Operation of Hydraulic Structures]. Samara, 2010, 360 p.
  2. Federal’nyy zakon ot 21.07.1997 g. ¹ 117-FZ «O bezopasnosti gidrotekhnicheskikh sooruzheniy» [Federal Law of 21.07.1997 no. 117-FZ “About the Safety of Hydraulic Structures”].
  3. STO 17330282.27.140.016—2008. Zdaniya GES i GAES. Organizatsiya ekspluatatsii i tekhnicheskogo obsluzhivaniya. Normy i trebovaniya. [Building Requirements 17330282.27.140.016—2008. Buildings of Hydraulic Power Plants and Hydraulic Nuclear Power Plants. Organization of Their Operation and Technical Maintenance. Norms and Requirements].
  4. 22-01.97 Trebovaniya k provedeniyu otsenki bezopasnosti ekspluatatsii proizvodstvennykh zdaniy i sooruzheniy podnadzornykh promyshlennykh proizvodstv i ob”ektov (obsledovaniya stroitel’nykh konstruktsiy spetsializirovannymi organizatsiyami). 22-01.97. Requirements Applicable to Assessment of Safety of Operation of Industrial Buildings and Structures of Industrial Enterprises and Facilities under Supervision (Examination of Structures by Specialized Organizations).
  5. SP 13-102—2003. Pravila obsledovaniya nesushchikh stroitel’nykh konstruktsiy zdaniy i sooruzheniy. [Building Rules 13-102—2003. Examination of Bearing Elements of Buildings and Structures].
  6. Zubkov V.A. Problemy ekspluatatsii stroitel’nykh konstruktsiy energeticheskikh sooruzheniy [Problems of Operation of Structural Units of Power Generating Structures]. Stroyinfo: Informatsionniyy byulleten’ [Building Information: Information Bulletin]. 2004, no. 12, pp. 20—23.
  7. Zubkov V.A., Kondrat’eva N.V. Ispytanie zhelezobetonnykh podkranovykh konsoley mashinnogo zala Zhigulevskoy GES [Testing of Reinforced Concrete Crane Consoles of the Machine Hall of Zhigulevskaya Hydraulic Power Plant]. Aktual’nye problemy v stroitel’stve i arkhitekture [Relevant Problems of Construction and Architecture]. Samara, 2005, pp. 422—424.
  8. Zubkov V.A., Shabanin V.V. Analiz napryazhenno-deformiruemogo sostoyaniya zatvorov vodoslivnoy plotiny Zhigulevskoy GES [Analysis of the Stress-Strained State of the Gates of the Overflow Dam of Zhigulevskaya Hydraulic Power Plant]. Aktual’nye problemy v stroitel’stve i arkhitekture [Relevant Problems of Construction and Architecture]. Samara, 2008, pp. 478—479.
  9. Kholopov I.S., Solov’ev A.V. Opyt proektirovaniya stal’nykh dvuskatnykh balok s krugloy perforatsiey stenki [Practical Design of Double-Pitch Steel Beams That Have Circular Perforation of Walls]. Stroitel’nyy vestnik rossiyskoy inzhenernoy akademii. Stroitel’stvo. [Construction Bulletin of the Russian Engineering Academy. Construction]. Moscow, 2010, no. 11, pp. 238—242.
  10. Kholopov I.S., Solov’ev A.V. Optimizatsionnaya model’ dlya balok s perforirovannoy stenkoy [Optimized Model of Beams That Have Perforated Walls]. Vestnik transporta Povolzh’ya [Proceedings of the Transport System of the Volga Region]. Collected works of the 67th All-Russian Scientific and Technical Conference. 2009, no. 17, pp. 713—714.

Download

Results 1 - 3 of 3