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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

DESIGN OF STRUCTURAL ELEMENTS IN THE EVENT OF THE PRE-SET RELIABILITY, REGULAR LOAD AND BEARING CAPACITY DISTRIBUTION

Vestnik MGSU 10/2012
  • 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 .

Pages 109 - 115

Accurate and adequate description of external influences and of the bearing capacity of the structural material requires the employment of the probability theory methods. In this regard, the characteristic that describes the probability of failure-free operation is required. The characteristic of reliability means that the maximum stress caused by the action of the load will not exceed the bearing capacity.
In this paper, the author presents a solution to the problem of calculation of structures, namely, the identification of reliability of pre-set design parameters, in particular, cross-sectional dimensions. If the load distribution pattern is available, employment of the regularities of distributed functions make it possible to find the pattern of distribution of maximum stresses over the structure.
Similarly, we can proceed to the design of structures of pre-set rigidity, reliability and stability in the case of regular load distribution. We consider the element of design (a monolithic concrete slab), maximum stress which depends linearly on load . Within a pre-set period of time, the probability will not exceed the values according to the Poisson law.
The analysis demonstrates that the variability of the bearing capacity produces a stronger effect on relative sizes of cross sections of a slab than the variability of loads. It is therefore particularly important to reduce the coefficient of variation of the load capacity. One of the methods contemplates the truncation of the bearing capacity distribution by pre-culling the construction material.

DOI: 10.22227/1997-0935.2012.10.109 - 115

References
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  2. Tichy M. In the Reliability Measure. Struct. Safety. 1988, vol. 5, pp. 227—232.
  3. Araslanov A.S. Raschet elementov konstruktsiy zadannoy nadezhnosti pri sluchaynykh vzaimodeystviyakh [Calculation of Structural Elements with the Pre-set Reliability If Exposed to Random Interactions]. Moscow, 1986, 268 p.
  4. Tamrazyan A.G. Otsenka riska i nadezhnosti nesushchikh konstruktsiy i klyuchevykh elementov — neobkhodimoe uslovie bezopasnosti zdaniy i sooruzheniy [Assessment of Risk and Reliability of Bearing Structures and Key Elements as the Necessary Condition of Safety of Buildings and Structures]. Vestnik TsNIISK [Bulletin of Central Research and Development Institute of Building Structures]. 2009, no. 1, pp. 160—171.
  5. JSO/TK 98 ST 2394. General Principles on Reliability for Structures. 1994, pp. 50.
  6. Rayzer V.D. Teoriya nadezhnosti v stroitel’nom proektirovanii [Theory of Reliability in Structural Design]. Moscow, ASV Publ., 1998, 304 p.

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