Computer modeling for investigating the stress-strainstate of beams with hybrid reinforcement

Vestnik MGSU 1/2014
  • Rakhmonov Ahmadzhon Dzhamoliddinovich - Volga State University of Technology (PGTU) postgraduate student, Department of Building Structures and Footings, Volga State University of Technology (PGTU), 3 Lenin sq., Yoshkar-Ola, 424000, Republic of Mari El, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Solovʹov Nikolai Pavlovich - Volga State University of Technology (PGTU) Candidate of Technical Sciences, Senior Lecturer, De- partment of Building Structures and Footings, Volga State University of Technology (PGTU), 3 Lenin sq., Yoshkar-Ola, 424000, Republic of Mari El, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pozdeev Viktor Mikhailovich - Volga State University of Technology (PGTU) Candidate of Technical Sciences, Chair, Department of Building Structures and Footings, Volga State University of Technology (PGTU), 3 Lenin sq., Yoshkar-Ola, 424000, Republic of Mari El, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 187-195

In this article the operation of a continuous double-span beam with hybrid reinforcement, steel and composite reinforcement under the action of concentrated forces is considered. The nature of stress-strain state of structures is investigated with the help of computer modeling using a three-dimensional model. Five models of beams with different characteristics were studied. According to the results of numerical studies the data on the distribution of stresses and displacements in continuous beams was provided. The dependence of the stress-strain state on increasing the percentage of the top re- inforcement (composite) of fittings and change in the concrete class is determined and presented in the article. Currently, the interest in the use of composite reinforcement as a working reinforcement of concrete structures in Russia has increased significantly, which is reflected in the increase of the number of scientific and practical publications devoted to the study of the properties and use of composite materials in construction, as well as emerging draft documents for design of such structures. One of the proposals for basalt reinforcement application is to use it in bending elements with combined reinforcement. For theoretical justification of the proposed nature of reinforcement and improvement of the calculation method the authors conduct a study of stress-strain state of continuous beams with the use of modern computing systems. The software program LIRA is most often used compared to other programs representing strain-stress state analysis of concrete structures.

DOI: 10.22227/1997-0935.2014.1.187-195

References
  1. Stepanova V.F., Stepanov F.Yu. Nemetallicheskaya kompozitnaya armatura dlya betonnykh konstruktsiy [Non-metallic Composite Reinforcement for Concrete Structures]. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering]. 2013, no. 1, pp. 45—47.
  2. Zyuzin R.S. Konstruktivnye osobennosti armirovaniya betonnykh konstruktsiy korrozionnostoykoy nemetallicheskoy kompozitnoy armatury [Design Features of Concrete Structures Reinforcement Using Corrosion Resistant Nonmetallic Composite Reinforcement]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2009, no. 5, pp. 9—11.
  3. Kiba I. Vtoroe rozhdenie kompozitnoy armatury [The Second Birth of Composite Reinforcement]. Stroitel'nye materialy, oborudovanie, tekhnologii XXI veka [Building Materials, Equipment, Technologies of the 21st Century]. 2013, no. 8 (175), pp. 28—29.
  4. Madatiyan S.A. Perspektivy razvitiya stal'noy i nemetallicheskoy armatury zhelezobetonnykh konstruktsiy [Prospects of the Development of Steel and Non-metallic Reinforcing of Concrete Structures]. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering]. 2002, no. 9, pp. 16—19.
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  6. Rakhmonov A.D., Solov'ev N.P. Patent RF 134965, MPK E04S 3/20 U1. Balka monolitnogo zhelezobetonnogo mezhduetazhnogo perekrytiya. Zayavitel' i patentoobladatel' Povolzhskiy gosudarstvennyy tekhnologicheskiy universitett. Zayav. 03.06.2013, opubl. 27.11.2013, Byul. ¹ 1 [RF Patent 134965, IPC E04S 3/20 U1. Monolithic Reinforced Concrete Beam of Floor Structure. Applicant and patentee Volga State University of Technology. Appl. 03.06.2013, published 27.11.2013, Bulletin no. 1]. 2 p.
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Application of three-dimensional simulation at lecturing on descriptive geometry

Vestnik MGSU 5/2014
  • Tel'noy Viktor Ivanovich - Moscow State University of Civil Engineering (MGSU) Candidate of Military Sciences, Associate Professor, Department of Descriptive Geometry and Engineering Graphics, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 183-24-83; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rychkova Anzhelika Vital'evna - Moscow State University of Economics, Statistics and Informatics (MESI) Candidate of Pedagogical Sciences, Associate Professor, Department of Mathematical Software for Information Systems and Innovation, Moscow State University of Economics, Statistics and Informatics (MESI), 7 Nezhinskaya str., Moscow, 119501, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 176-183

Teaching descriptive geometry has its own characteristics. Need not only to inform students of a certain amount of knowledge on the subject, but also to develop their spatial imagination as well as the right to develop the skills of logical thinking. Practice of teaching the discipline showed that students face serious difficulties in the process of its study. This is due to the relatively low level of their schooling in geometry and technical drawing, and lacking in high spatial imagination. They find it difficult to imagine the geometrical image of the object of study and mentally convert it on the plane. Because of this, there is a need to find ways to effectively teach the discipline «Descriptive Geometry» at university. In the context of global informatization and computerization of the educational process, implementation of graphically programs for the development of design documentation and 3D modeling is one of the most promising applications of information technology in the process of solving these problems. With the help of three-dimensional models the best visibility in the classroom is achieved. When conducting lectures on descriptive geometry it is requested to use three-dimensional modeling not only as didactic means (demonstrativeness means), but also as a method of teaching (learning tool) to deal with various graphics tasks. Bearing this in mind, the essence of the implementation of 3D modeling is revealed with the aim of better understanding of the algorithms for solving both positional and metric tasks using spatial representation of graphic constructions. It is shown that the possibility to consider the built model from different angles is of particular importance, as well as the use of transparency properties for illustrating the results of solving geometric problems. Using 3D models together with their display on the plane, as well as text information promotes better assimilation and more lasting memorization of the material.

DOI: 10.22227/1997-0935.2014.5.176-183

References
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