DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

GENERATION OF A VECTOR OF NODAL FORCES PRODUCED BY LOADS PRE-SET BY THE ARBITRARY SCULPTED SURFACE DESIGNATED FOR UNIVERSAL STRESS ANALYSIS SOFTWARE

Vestnik MGSU 3/2012
  • Shaposhnikov Nikolay Nikolaevich - Moscow State University of Roads (MSUCE) Doctor of Technical Sciences, Associate Member of the Russian Academy of Architectural and Civil Engineering Sciences, Professor, Department of Systems of Computer-Aided Design of Transportation Structures and Constructions 8 (903) 786-53-64, Moscow State University of Roads (MSUCE), Office 7720, 2 Minaevskiy pereulok, Moscow, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Nesterov Ivan Vladimirovich - Moscow State University of Railway Engineering (MIIT) Candidate of Technical Sciences, Associate Professor, chair, Department of Structural Mechanics, Moscow State University of Railway Engineering (MIIT), 9 Obraztsova str., Moscow, 127994, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 56 - 62

The subject matter of the article represents the concept of a vector of nodal forces produced by loads pre-set by the arbitrary sculpted surface. The concept in question may be integrated into engineering CAD systems in the capacity of a preprocessor.
Pursuant to the proposed methodology, the initial surface load represents a geometric object pre-set as a selection of standard graphic primitives. This technology is easy to use if the pre-processing constituent of the strength analysis system operates within CAD media. Multi-factor strength-related problems were resolved by Department of Computer-Aided Design of Moscow State University of Roads. Researchers have developed and tested KATRAN open architecture strength analysis software programme that may be integrated into AutoCAD processor.
A user may select the surface accommodating any simulated arbitrary load; further, a point of the pre-set load intensity specified in the Distributed Load Q field of interface window Distributed Loads, and the point of zero intensity load are to be specified. The above source data are used to calculate the scale coefficient of transition from linear distances to the real value of the load intensity generated within the coordinate surface. The point of zero load intensity represents a virtual plane of zero distributed load values.
The proposed software designated for the conversion of arbitrary distributed loads into the nodal load is compact; therefore, it may be integrated into modules capable of exporting the nodal load into other systems of strength analysis, though functioning as a problem-oriented geometrical utility of AutoCAD.

DOI: 10.22227/1997-0935.2012.3.56 - 62

References
  1. Zienkiewicz O. Metod konechnykh elementov v tekhnike [Method of Finite Elements in the Engineering Science]. Moscow, Mir, 1975.
  2. Werner Zommer. AutoCAD 2008. Rukovodstvo chertezhnika, konstruktora, arkhitektora [AutoCAD 2008. Guide for Draftsman, Designer, Architect]. Moscow, Binomial Press, 2008, 816 p.

Download

PREDICTION OF MAXIMUM CREEP STRAIN OF HIGH PERFORMANCE STEEL FIBER REINFORCED CONCRETE

Vestnik MGSU 12/2012
  • Mishina Alexandra Vasil'evna - Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS) postgraduate student, Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Bezgodov Igor' Mikhaylovich - Moscow State University of Civil Engineering (MSUCE) Researcher, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Andrianov Aleksey Aleksandrovich - Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS) Candidate of Technical Sciences, Senior Researcher; +7 (495) 482-40-18, Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 66 - 70

The strongest research potential is demonstrated by the areas of application of high performance steel fiber reinforced concrete (HPSFRC). The research of its rheological characteristics is very important for the purposes of understanding its behaviour. This article is an overview of an experimental study of UHSSFRC. The study was carried out in the form of lasting creep tests of HPSFRC prism specimen, loaded by stresses of varied intensity. The loading was performed at different ages: 7, 14, 28 and 90 days after concreting. The stress intensity was 0.3 and 0.6 Rb; it was identified on the basis of short-term crush tests of similar prism-shaped specimen, performed on the same day. As a result, values of ultimate creep strains and ultimate specific creep of HPSFRC were identified. The data was used to construct an experimental diagramme of the ultimate specific creep on the basis of the HPSFRC loading age if exposed to various stresses. The research has resulted in the identification of a theoretical relationship that may serve as the basis for the high-precision projection of the pattern of changes in the ultimate specific creep of HPSFRC, depending on the age of loading and the stress intensity.

DOI: 10.22227/1997-0935.2012.12.66 - 70

References
  1. Beddar M. Fiber Reinforced Concrete: Past, Present and Future. Scientific works of the 2nd International conference on concrete and reinforced concrete. Moscow, 2005, vol. 3. pp. 228—234.
  2. Gorb A.M., Voylokov I.A. Fibrobeton – istoriya voprosa, normativnaya baza, problemy i resheniya [Fibre-reinforced Concrete – Background, Normative Base (Problems and Solutions)] ALITInform mezhdunarodnoe analiticheskoe obozrenie [ALITInform International Analytical Review]. 2009, no. 2, pp. 34—43.
  3. Almansour H., Lounus Z. Structural Performance of Precast Pre-stressed Bridge Girders Built with Ultra High Performance Concrete. Institute for Research in Construction. The Second International Symposium on Ultra High Performance Concrete. March 05-07, 2008. Kassel, Germany, pp. 822—830.
  4. Arafa M., Shihada S., Karmout M. Mechanical Properties of Ultra High Performance Concrete Produced in the Gaza Strip. Asian Journal of Materials Science, 2010, 2(1), pp. 1—12.
  5. Schmidt M., Fehling E. Ultra-high-performance Concrete: Research, Development and Application in Europe. ACI Special Publication, 2005, vol. 228, pp. 51—78.
  6. Mishina A.V., Andrianov A.A. Rabota vysokoprochnogo stalefi brobetona pri kratkovremennom zagruzhenii [Behaviour of High Strength Steel Fiber Concrete Exposed to Short-term Loading]. Fundamental’nye issledovaniya RAASN po nauchnomu obespecheniyu razvitiya arkhitektury, gradostroitel’stva i stroitel’noy otrasli Rossiyskoy Federatsii v 2011 g. [Fundamental Researches of RAACS in Architecture, Town Planning and Construction Industry of the Russian Federation in 2011]. Moscow, MGSU Publ, 2012, vol. 2, pp. 76—78.
  7. Pukharenko Yu.V., Golubev V.Yu. Vysokoprochnyy stalefi brobeton [High Strength Steel Fiber Reinforced Concrete] Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2007, no. 9, pp. 40—41.
  8. Mishina A.V., Chilin I.A., Andrianov A.A. Fiziko-tekhnicheskie svoystva sverkhvysokoprochnogo stalefibrobetona [Physical Technical Properties of High Performance Steel Fiber Reinforced Concrete] Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 3, pp. 159—165.
  9. GOST 24544—81. Betony. Metody opredeleniya deformatsiy usadki i polzuchesti [State Standard 24544—81. Concretes. Methods of Identification of Creep and Shrinkage Strain].
  10. Karpenko N.I., Romkin D.S. Sovremennye metody opredeleniya deformatsiy polzuchesti novykh vysokoprochnykh betonov [Advanced Methods of identification of Deformations of Creep of Highperformance Concretes]. Fundamental’nye issledovaniya RAASN po nauchnomu obespecheniyu razvitiya arkhitektury, gradostroitel’stva i stroitel’noy otrasli Rossiyskoy Federatsii v 2011 g. [Fundamental Researches of RAACS in Architecture, Town Planning and Construction Industry of the Russian Federation in 2011]. Moscow, MGSU Publ, 2012, vol. 2, pp. 83—87.
  11. Romkin D.S. Vliyanie vozrasta vysokoprochnogo betona na ego fiziko-mekhanicheskie I reologicheskie svoystva [Infl uence of Age of High-strength Concrete on its Physical, Mechanical and Rheological Properties]. Moscow, 2010, 12 p.

Download

COAST PROTECTION STRUCTURES WITH A WAVEDISSIPATION CHAMBERS

Vestnik MGSU 4/2013
  • Baadzhi Vladimir Georgievich - Odessa State Academy of Civil Engineering and Architecture (OGASA) postgraduate student, Department of Construction of Energy Engineering and Water Engineering Structures, Odessa State Academy of Civil Engineering and Architecture (OGASA), 4 Didrikhsona st., Odessa, 65029, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rogachko Stanislav Ivanovich - Odessa State Academy of Civil Engineering and Architecture (OGASA) Doctor of Technical Sciences, Professor, Department of Construction of Energy Engineering and Water Engineering Structures, Odessa State Academy of Civil Engineering and Architecture (OGASA), 4 Didrikhsona st., Odessa, 65029, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shun’ko Natal’ya Vladimirovna - Moscow State University of Civil Engineering (MGSU) Director, Laboratory of Research Laboratory of Marine Oilfield 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 137-142

Presently, many coast protection structures built in the 20th century along the coastline of the Black and Azov seas are in the emergency state. The pre-set term of their service life has expired, as they were designed to withhold substantial storm loads occurring every 25 years. These structures were repeatedly exposed to design storm loads. Besides, during severe winters, they were exposed to ice loads. Passive coast protection structures designated for protection of areas accommodating industrial and civil buildings close to the shoreline need urgent restructuring.New design of a passive coast protection structure is presented in this paper in detail. The proposed structure can efficiently resist both the load of sea waves and ice in rare severe winters. Thus, this structural solution can reliably protect areas accommodating industrial and civil buildings close to the shoreline.Currently, artificial islands are used to extract hydrocarbons from sea deposits in the shallow waters of the continental shelf. New passive coast protection structures can be used to protect slopes of artificial islands and earth dams from waves and ice.

DOI: 10.22227/1997-0935.2013.4.137-142

References
  1. Mangor Karsten. Shoreline Management Guidelines. DHI Water and Environment, 2004, 294 p.
  2. Rogachko S.I., Baadzhi V.G. Patent na izobretenie UA ¹ 98645 UA MPK (2012) E02V 3/04 «Beregozashchitnoe sooruzhenie» [Patent for an Invention UA ¹98645 UA MPK (2012) E02V 3/04 Coast Protection Structure].
  3. Rogachko S.I. Beregozashchitnoe sooruzhenie. Avtorskoe svidetel’stvo ¹ 776109 ot 07.07.1980. Byulleten’ ¹ 40. Otkrytiya, izobreteniya i tovarnye znaki. [Coast Protection Structure. Authorship Certificate no. 776109 of 07.07.1980. Bulletin no. 40. Discoveries, Inventions and Trademarks]. Moscow, 1980.

Download

Results 1 - 3 of 3