Time-Dependent Topology of Railway Prestressed Concrete Sleepers

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Li, Dan^1 ; Ngamkhanong, Chayut^1 ; Kaewunruen, Sakdirat^1,2

Department of Civil Engineering, University of Birmingham, United Kingdom^1

Birmingham Centre for Railway Research and Education, University of Birmingham, United Kingdom^2

关键词: Creep and shrinkages;    Engineered materials;    Long term performance;    Lower maintenance costs;    Prestressed concrete sleepers;    Railway prestressed concrete sleeper;    Railway track structures;    Time-dependent performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/3/032046/pdf
DOI  :  10.1088/1757-899X/245/3/032046

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The railway sleepers are very important component of railway track structure. The sleepers can be manufactured by using timber, concrete, steel or other engineered materials. Nowadays, prestressed concrete has become most commonly used type of sleepers. Prestressed concrete sleepers have longer life-cycle and lower maintenance cost than reinforced concrete sleepers. They are expected to withstand high dynamic loads and harsh environments. However, durability and long-term performance of prestressed concrete sleepers are largely dependent on creep and shrinkage responses. This study investigates the long-term behaviours of prestressed concrete sleepers and proposes the shortening and deflection diagrams. Comparison between design codes of Eurocode 2 and AS3600-2009 provides the insight into the time-dependent performance of prestressed concrete sleepers. The outcome of this paper will improve the rail maintenance and inspection criteria in order to establish appropriate sensible remote track condition monitor network in practice.