Substantiation of the necessity and method of upgrading the software of the measuring complex for assessing the load capacity of girder spans of road bridges

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Abstract


The article notes that the software of the complex used in the Russian troops to solve in a short time the actual problem of determining the possibility of safe passage of super heavy loads on girder road bridges has the following disadvantages: 1) it can only be used for split concrete bridges; 2) the decision to pass a large load through the bridge is made only by the value of the deflection in the center of the span, without taking into account the resulting stresses in the bridge span structure structures, and without taking into account the bearing capacity of the supports. In the article, in order to eliminate these shortcomings: 1) a strict formula is obtained for calculating the deflection in the middle of beam spans made of any structural materials from the angle of rotation of their support sections; 2) based on the use of the fundamental relationship between the relative heights of girder spans, the relative deformations of the edges of their cross sections and their relative deflections, it is proved that the maximum stresses in the edges of the cross sections of girder spans from any structural materials can be calculated by the maximum deflection value in the middle of their spans; 3) a method is established for determining the ability of beam bridge supports to ensure safe passage of a heavy vehicle by the nature of changing the rotation angles of the supporting cross sections of the span structures under the influence of the movement of the heavy vehicle layout. Taking these three results into account, when upgrading the software of the measurement system, ensures that the goal of the work is achieved.


About the authors

Pavel M. Salamakhin

Moscow Automobile and Road State Technical University

Author for correspondence.
Email: pavel-salamahin@mail.ru
SPIN-code: 2596-3649
64 Leningradsky Ave., Moscow, 125319, Russian Federation

leading researcher, Doctor of Technical Sciences, Professor, member of the Russian Academy of Transport

Evgenii A. Lugovtsev

Military Training and Research Center of Land Forces “Combined Arms Academy of the Armed Forces of the Russian Federation”

Email: pavel-salamahin@mail.ru
SPIN-code: 7389-8508
4 Devich'ego Polya Passage, Moscow, 119121, Russian Federation

Candidate of Technical Sciences, doctoral student of the Department of Roads, Bridges and Crossings

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