OasisLMS

Abstract: Multi-bar tiebacks by MST, made from Glass Fiber Reinforced Polymer (GFRP), offer an innovative solution for both temporary and long-term anchoring applications, providing numerous advantages over traditional steel tiebacks. A key feature of multi-bar GFRP tiebacks by MST is their low relaxation, improved creep behavior, and very high bond strength, ensuring that the bonded zone remains intact even under high cyclic loading. These features make them highly effective in retaining structures under demanding conditions. Additionally, their lightweight and corrosion-resistant properties contribute to a reduced carbon footprint compared to steel alternatives. GFRP tiebacks are lighter to transport and easier to install, reducing cost and logistics during construction. Their non-corrosive nature also extends the service life of structures, minimizing maintenance and replacement needs, which further reduces environmental impact.

For short-term applications, multi-bar GFRP tiebacks by MST offer the added benefit of being easy to cut, a feature particularly useful in urban projects where future expansions may require additional excavation. This feature helps prevent tunnel boring machines from getting stuck during infrastructure growth, making multi-bar GFRP tiebacks by MST ideal for dynamic, evolving urban environments.

This study presents the results of extensive field testing, which validates the performance of multi-bar GFRP tiebacks by MST. Long-term monitoring of creep and relaxation behavior under different load conditions demonstrated exceptional stability and reliable load retention. multi-bar GFRP tiebacks by MST, with their enhanced load capacity and eco-friendly characteristics, represent a sustainable and high-performance alternative to steel for a wide range of construction and infrastructure projects.

Keywords: Multi-bar GFRP tiebacks by MST, corrosion resistance, load capacity, creep behavior, relaxation behavior, sustainable construction, urban infrastructure, temporary anchoring, long-term anchoring

Alireza Asadian; Mr. Mike Porco

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