Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improving serviceability of concrete railroad ties using prestressed AFRP strands
Highlights A major flaw seen with concrete ties is deterioration due to the environmental or fatigue loading. Another issue found in concrete ties, not found in timber, is the electrical conductivity. A class of concrete railroad ties utilizing AFRP strand as the prestressing material was designed and evaluated. AFRP strands are a potential substitute for steel strands for a railroad tie.
Abstract Prestressing with steel strands has been a key aspect in providing the required strength and durability for railroad ties (sleepers) needed to resist the loads on heavy haul lines in many countries. In spite of their improved durability in contrast to timber ties, a major flaw seen with concrete ties is deterioration due to the environmental or fatigue loading. Another issue found in concrete ties, not found in timber, is the electrical conductivity. The objective of this research is to design and to evaluate a class of concrete railroad ties utilizing aramid fiber reinforced polymer (AFRP) strand as the prestressing material. AFRP prestressed ties were constructed and tested for serviceability and strength following the guidelines provided by the American Railway Engineering and Maintenance-of-way Association (AREMA). Results demonstrated that AFRP strands are a potential substitute for steel strands. Some detail improvements may be necessary to mitigate cracking, this can be achieved by using smaller diameter strands.
Improving serviceability of concrete railroad ties using prestressed AFRP strands
Highlights A major flaw seen with concrete ties is deterioration due to the environmental or fatigue loading. Another issue found in concrete ties, not found in timber, is the electrical conductivity. A class of concrete railroad ties utilizing AFRP strand as the prestressing material was designed and evaluated. AFRP strands are a potential substitute for steel strands for a railroad tie.
Abstract Prestressing with steel strands has been a key aspect in providing the required strength and durability for railroad ties (sleepers) needed to resist the loads on heavy haul lines in many countries. In spite of their improved durability in contrast to timber ties, a major flaw seen with concrete ties is deterioration due to the environmental or fatigue loading. Another issue found in concrete ties, not found in timber, is the electrical conductivity. The objective of this research is to design and to evaluate a class of concrete railroad ties utilizing aramid fiber reinforced polymer (AFRP) strand as the prestressing material. AFRP prestressed ties were constructed and tested for serviceability and strength following the guidelines provided by the American Railway Engineering and Maintenance-of-way Association (AREMA). Results demonstrated that AFRP strands are a potential substitute for steel strands. Some detail improvements may be necessary to mitigate cracking, this can be achieved by using smaller diameter strands.
Improving serviceability of concrete railroad ties using prestressed AFRP strands
Park, Sun-Hee (Autor:in) / Posluszny, Ryan (Autor:in) / Mander, John B. (Autor:in) / Hurlebaus, Stefan (Autor:in)
12.01.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Railroad ties of prestressed concrete
Engineering Index Backfile | 1951
Modeling of concrete beams prestressed with AFRP tendons
| British Library Conference Proceedings | 2010
Structural behaviour of concrete slabs prestressed with AFRP bars
| British Library Conference Proceedings | 1995
Flexural Behaviour of Prestressed Concrete Beam Using AFRP Pre-tentioning Tendons
| British Library Conference Proceedings | 1997
Impact Resistance of Concrete Beams Using AFRP Rods and/or PC Steel Strands+
| British Library Conference Proceedings | 1996