bricstransportТранспорт БРИКСBRIСS Transport2949-0812ФГБУ ДПО «УМЦ ЖДТ»10.46684/2023.1.4bricstransport-4Research ArticleИНФРАСТРУКТУРА ТРАНСПОРТАTRANSPORT INFRASTRUCTUREУпругие характеристики подрельсового основания безбалластного железнодорожного путиModulus of elasticity of non-ballasted trackИвановаК. И.IvanovaK. I.

 Санкт-Петербург 

Ksenia I. Ivanova — Teaching Assistant of the Department “Construction of Roads of Transport Complex”

9 Moskovsky pr., St. Petersburg, 190031, Russian Federation 

kivanova@pgups.ruКолосА. Ф.KolosA. F.

 Санкт-Петербург 

AuthorID: 348046 

Alexey F. Kolos — Head of the Department “Construction of Roads of the Transport Complex”

9 Moskovsky pr., St. Petersburg, 190031, Russian Federation 

kolos2004@inbox.ruВанСWangX.

 Санкт-Петербург 

Xintong Wang — postgraduate student of the Department “Construction of Roads of Transport Complex”

9 Moskovsky pr., St. Petersburg, 190031, Russian Federation 

wangxintong@mail.ruПетербургский государственный университет путей сообщения Императора Александра I (ПГУПС)РоссияEmperor Alexander I St. Petersburg State Transport University (PSTU)Russian Federation202314042023214Copyright © Иванова К.И., Колос А.Ф., Ван С., 20232023Иванова К.И., Колос А.Ф., Ван С.Ivanova K.I., Kolos A.F., Wang X.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.bricstransport.ru/jour/article/view/4

Основными упругими характеристиками, определяющими значения напряжений в элементах кон- струкции верхнего строения пути под нагрузкой от движущегося поезда, являются модуль упругости подрельсового основания и коэффициент соотносительной жесткости подрельсового основания и рельса. Значения этих параметров для пути с ездой на балласте сегодня исследованы и хорошо известны, в отличие от безбалластного пути. Цель исследования — натурное определение упругих характеристик безбалластного железнодорожного пути, их сравнение с аналогичными характеристиками для пути на балласте и оценка воздействия данных характеристик на напряженно-деформированное состояние элементов верхнего строения безбалластного пути. Натурные испытания по измерению напряжений в элементах верхнего строения пути осуществлялись с помощью тензометрических методов. В результате экспериментов установлены значения модуля упругости подрельсового основания и коэффициента соотносительной жесткости подрельсового основания и рельса для безбалластной конструкции RHEDA2000. Полученные результаты дают возможность рассматривать рельс как балку, лежащую на сплошном упругом основании, применительно к безбалластному пути и использовать известные методы расчета для проектирования железнодорожного пути с устройством безбалластной конструкции в зависимости от условий эксплуатации.

The main stiffness properties that determine the stresses in the track structure components under loads from a moving train are the modulus of elasticity of the rail slab and the slab-track/rail correlation stiffness coefficient. These parameters have been investigated for a ballasted track and are well established today, in contrast to those of a non-ballasted track. This study aims at determining the stiffness characteristics of a non-ballasted track, comparing them with those of a ballasted track, and assessing their effect on the stress-strain state (SSS) of the elements of a non-ballasted track structure. Field experiments to measure the stresses in the track structure elements were carried out using strain-gauge methods. As a result of the experiments, the modulus of elasticity and the correlation stiffness coefficient of the rail slab and the rail were determined for the RHEDA2000 slab track system. The results obtained prove it possible to apply a rail-as-beamon-elastic-foundation theory and to use well-established calculation methods for designing a non-ballasted track structure suitable for different operational conditions.

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The authors declare that there are no conflicts of interest present.