Technique and technology of silicates Technique and technology of silicates Техника и технология силикатов 2076-0655 116877 10.62980/2076-0655-2026-456-465 qsyqqn ОСНОВНАЯ РУБРИКА MAIN RUBRIC ОСНОВНАЯ РУБРИКА MODELING OF ALKALI-SILICA CORROSION OF PRESTRESSED CONCRETE STRUCTURES МОДЕЛИРОВАНИЕ ЩЕЛОЧНО-КРЕМНЕЗЕМНОЙ КОРРОЗИИ ПРЕДНАПРЯЖЕННЫХ ЖЕЛЕЗОБЕТОННЫХ КОНСТРУКЦИЙ Бахарев Максим Витальевич Bakharev Maxim Vitalievich bacharevmax@mail.ru Кондращенко Валерий Иванович Kondrashchenko Valerii Ivanovich kondrashchenko@mail.ru

доктор технических наук;

doctor of technical sciences;

 ФГБОУ ВО «Российский университет транспорта (РУТ(МИИТ)) Москва Россия Russian University of Transport (RUT(MIIT)) Moscow Russian Federation ФГБОУ ВО «Российский университет транспорта (РУТ(МИИТ)) Москва Россия Russian University of Transport (RUT(MIIT)) Moscow Russian Federation 20 12 2025 20 12 2025 32 5 456 465 22 10 2025 20 11 2025 https://tsilicates.ru/en/nauka/article/116877/view

В работе предложена методика оценки прочностных характеристик предварительно напряженных железобетонных конструкций, подверженных деградации вследствие щелочно-кремнеземной коррозии. Методология базируется на принципах информационного моделирования, что позволяет интегрировать данные о процессе деградации в целостную цифровую модель объекта. Основу методики составляет макромодель, устанавливающая прямую корреляцию между процессами набухания реактивного крупного заполнителя и результирующим напряженно-деформированным состоянием конструктивной системы. Ключевым инструментом модели являются введенные коэффициенты модификации для прочностных характеристик и модуля упругости бетона. Данные коэффициенты позволяют анизотропно редуцировать механические свойства материала в зависимости от величины деформаций набухания, учитывая разнонаправленный характер по-вреждений. В рамках исследования оценена корреляция между снижением значений коэффициентов модификации и характером внешнего силового воздействия (долговременное сжатие или растяжение). На основе полученных зависимостей сформулированы практические рекомендации по структурированию и параметризации информационной модели, направленные на повышение адекватности оценки несущей способности и долговечности поврежденных конструкций.

This paper proposes a method for assessing the strength characteristics of prestressed reinforced concrete structures. The structures were subject to degradation due to alkali-silica corrosion. The methodology is based on the principles of information modeling. This allows for the integration of degradation process data into a comprehensive digital model of the facility. The methodology is based on a macromodel. It establishes a direct correlation between the swelling processes of reactive coarse aggregate and the resulting stress-strain state of the structural system. The key tool of the model is the modification coefficients introduced for the strength characteristics and elastic modulus of concrete. These coefficients allow for anisotropic reduction of the material's mechanical properties depending on the magnitude of swelling deformations. In this case, the multidirectional nature of the damage is taken into account. This study assessed the correlation between the reduction in modification coefficient values and the nature of the external force applied. The external force applied was either long-term compression or tension. Based on the obtained dependencies, practical recommendations for structuring and parameterizing the information model were formulated. The recommendations are aimed at improving the adequacy of assessing the load-bearing capacity and durability of damaged structures.

 щелочно-кремнеземная коррозия макромоделирование анизотропная деградация бетон напряженно-деформированное состояние alkali-silica corrosion macromodeling anisotropic degradation concrete stress-strain state

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