scholarly journals Calculation of reliability of the reinforced concrete beam with the normal crack on the deflection at the operation stage

2017 ◽  
Vol 1 ◽  
pp. 4-9 ◽  
Author(s):  
Utkin V.S. ◽  
Karpushova K.A.
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Statistical Information ◽  
Normal Operation ◽  
Method Of Calculation ◽  
Operation Stage ◽  
Standard Value ◽  
Method Of Measurement

The deflection of a steel concrete beam at an operation stage sharply increases in case of formation of a normal crack in the stretched zone of concrete and can lead to violation of its normal operation, and in certain cases warns about possible accident. In article the method of measurement and monitoring of a deflection of a beam, a method of calculation of reliability of a beam by criterion of a deflection is considered in case of limited statistical information on values of a deflection in timepoint of t, determination of a residual temporary resource of a beam by criterion of a deflection in case of the known extreme (standard) value of a deflection of a beam.

On-Site Determination of the Polarization Resistance in a Reinforced Concrete Beam

CORROSION ◽  
1988 ◽  
Vol 44 (10) ◽  
pp. 761-765 ◽  
Author(s):  
S. Feliu ◽  
J. A. Gonzalez ◽  
C. Andrade ◽  
V. Feliu
Keyword(s):  
Reinforced Concrete ◽  
Polarization Resistance ◽  
Concrete Beam ◽  
Reinforced Concrete Beam

scholarly journals Calculation of steel-reinforced concrete beam for instant loading taking into account the non-linearity of the concrete diagram ε-σ

2020 ◽  
Vol 17 (2) ◽  
pp. 85-94
Author(s):  
S. O. Chepilko ◽  
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Reinforced Concrete Beam ◽  
Neutral Axis ◽  
Reinforced Concrete Beams ◽  
System Of Equations ◽  
Nonlinear System Of Equations ◽  
Steel Reinforced Concrete

Issues of calculating steel-reinforced concrete beams are considered taking into account a nonlinear concrete diagram based on the Sargin formula. The nonlinear system of equations for determination of curvature and neutral axis, which is solved numerically, is written in explicit form. Explicit expressions for determination of other calculated quantities needed for design of steel-reinforced concrete beams are derived. Numerical examples are given. The analysis of accounting nonlinearity in comparison with the linear calculation is carried out.

scholarly journals Determination of natural modes of railway overpasses

2021 ◽  
Vol 19 (1) ◽  
pp. 1-10
Author(s):  
Seidulla S. Abdullayev ◽  
Gabit B. Bakyt ◽  
Muslim N. Aikumbekov ◽  
Ivan S. Bondar ◽  
Yerlan T. Auyesbayev
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Rolling Stock ◽  
Software Systems ◽  
Structural Elements ◽  
Natural Vibrations ◽  
Railway Bridges ◽  
Natural Modes

Currently, there are many software systems and environments that allow you to simulate and perform fairly complex and voluminous calculations associated with dynamic effects on structural elements of overpasses. The aim of the article is to make an analysis of a reinforced concrete railway overpass as a whole and its elements separately. The article presents the calculated and experimental data of the forms and frequencies of natural vibrations of reinforced concrete railway overpasses under constant loads and the rolling stock off the span. As a result of the analysis of the tests, it was determined that the effect of the rolling stock passing through the reinforced concrete beam spans of 16.5 m and 23.6 m appears with frequency perturbations that are in the range f = 4.41 ÷ 9.52 Hz. These studies can be further used in the design of artificial structures, as well as to identify defects in structural elements of railway bridges.

scholarly journals Calculation of reliability of the steel concrete beam for criterion of durability of the working armature in case of formation of the normal crack in the stretched concrete zone

2016 ◽  
Vol 2 ◽  
pp. 4-8
Author(s):  
Utkin V.S. ◽  
Karpushova K.A.
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Strength Condition ◽  
Method Of Calculation

In work the method of calculation of reliability (safety) of a reinforced concrete beam with a crack in the stretched beam concrete zone by criterion of durability of working fittings in section with the opened crack is presented. In this section sharply increases the voltage in the working armature in comparison with the voltage in the armature outside of cracks and accordingly reduced the reliability of beams according to strength condition of the valve. Tension in fittings on participation with the opened crack in concrete of a beam is offered to express through width of disclosure of a crack, what is much simpler, more precisely and the result of calculation of reliability of a beam on criterion of durability of fittings at a stage of operation will differ in bigger reliability.

Analysis of reinforced concrete beam with small fibre

2020 ◽  
Author(s):  
Pavlina Mateckova ◽  
Zuzana Marcalikova ◽  
David Bujdoš ◽  
Marie Kozielova
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Small Fibre
Sign in / Sign up

Export Citation Format

Share Document