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Influence of incompatibility of thermomechanical parameters of bearing layers of a bridge structure on its thermo-stressed state

Influence of incompatibility of thermomechanical parameters of bearing layers of a bridge structure on its thermo-stressed state

Abstract

On the basis of the theory of thermoelasticity, the problem of the thermally stressed state of a two-layer fragment of a bridge structure, consisting of a metal base and an asphalt-concrete upper layer, under conditions of a change in the ambient temperature at different values of the coefficients of thermal linear expansion of the layers is considered. Using the finite element method, the fields of thermal stresses, deformations and displacements are constructed for various values of the thermomechanical characteristics of the layers. The analysis of the influence of the values of thermomechanical parameters on the stress-strain state of the system is carried out. It is shown that with an increase in the incompatibility of these characteristics, the intensities of stresses and strains increase. The zones of concentration of these functions are found. It is recommended to use materials with close values of their thermomechanical parameters when designing bridges to avoid their premature destruction.

На базі теорії термопружності розглянуто задачу про термонапружений стан двошарового фрагмента мостової конструкції, що складається з металевої основи і асфальтобетонного верхнього шару, в умовах зміни температури навколишнього середовища при різних значеннях коефіцієнтів температурного лінійного розширення шарів. За допомогою методу скінченних елементів побудовані поля температурних напружень, деформацій і переміщень при різних значеннях термомеханічних характеристик шарів. Виконаний аналіз впливу значень термомеханічних параметрів на напружено-деформований стан системи. Показано, що зі збільшенням несумісності цих характеристик інтенсивності напружень і деформацій зростають. Знайдені зони концентрації цих функцій. Рекомендовано при проектуванні мостів для уникнення їх передчасної деструкції використовувати матеріали з близькими значеннями їх термомеханічних параметрів.

Keywords

несумісність термомеханічних параметрів, двошарова мостова конструкція, поля термонапружень, two-layer bridge structure, incompatibility of thermomechanical parameters, thermal stress fields, finite element analysis, скінченноелементний аналіз

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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