Akademik Veri Yönetim Sistemi
4th International Civil Engineering & Architecture Conference (ICEARC'25), Trabzon, Türkiye, 17 Mayıs - 19 Eylül 2025, ss.1905-1912, (Tam Metin Bildiri)
Fiber-reinforced polymer (FRP) systems are widely used in modern
structural engineering for strengthening and rehabilitating structures, owing
to advantages such as high strength, low weight, corrosion resistance, and ease
of application. However, the structural contribution of FRP systems—comprising
various fiber types embedded in polymer matrices—can be significantly
diminished when exposed to environmental conditions such as high temperature.
In particular, as the polymer matrix approaches its glass transition
temperature (Tg), structural integrity begins to deteriorate, leading to
reduced load-carrying capacity. This study aims to evaluate the high-temperature
performance of FRP systems and examine the influence of thermal effects on
their structural contribution. A comprehensive experimental program was
designed considering four key parameters: fiber type, number of wrapping
layers, temperature level, and exposure duration. Wrapped and unwrapped
standard cylindrical concrete specimens were subjected to designated thermal
scenarios, followed by compressive strength testing. FRP system performance was
assessed based on numerical data (surface temperature and compressive strength)
and visual indicators (color changes, resin degradation, and failure modes).
The findings show that FRP effectiveness depends not only on composite type and
wrapping configuration but also on the level and duration of temperature
exposure. As the epoxy matrix approached its Tg, reductions in bonding capacity
were initiated, leading to weakened fiber–matrix interactions and a gradual
shift in failure behavior with increasing temperature. These results emphasize
the necessity of incorporating thermal considerations into the design process
and supporting FRP systems with appropriate insulation strategies for reliable
performance under high temperature.