Bond-Slip response of TRM-concrete systems with chemically embedded epoxy-anchors


MERCİMEK Ö., Yüncüler M., ÇALIŞKAN Ö., Kocaman İ., ANIL Ö.

Engineering Failure Analysis, cilt.181, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 181
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.engfailanal.2025.109961
  • Dergi Adı: Engineering Failure Analysis
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
  • Anahtar Kelimeler: Anchor, Bond-slip, Carbon textile, Concrete, Epoxy, Mortar, TRM
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

This study investigates the bond-slip behaviour between Textile Reinforced Mortar (TRM) systems and concrete substrates through an extensive experimental and analytical approach. A total of 48 concrete block specimens were tested using a custom-designed direct pull-out test setup, where TRM strips were bonded to the top surface of concrete blocks and subjected to axial tensile loading. Key experimental parameters included concrete compressive strength (C15 and C30), TRM strip width (50 mm and 100 mm), bonded length (150 mm, 300 mm, 450 mm), and various configurations of fan type anchor systems, each comprising CFRP fan-anchors. The results demonstrated that increasing the strip width led to an average increase of approximately 68 % in maximum load capacity and 96 % in energy dissipation. Specimens with higher-strength concrete (C30) exhibited an average of 35 % greater bond capacity and 62 % higher energy absorption compared to those with lower-strength concrete (C15). Furthermore, the use of mechanical anchors resulted in average gains of 81 % in load capacity and nearly 165 % in energy dissipation relative to unanchored specimens. Based on the experimental findings, multivariate regression models were developed to estimate the key interface parameters required for cohesive zone modelling. The study provides a comprehensive understanding of the factors affecting the TRM-concrete bond and delivers valuable insight for the structural strengthening design of reinforced concrete elements.