A novel bond-slip model between TRM strips and different types of masonry walls: Experimental approach

Çelik A., Mercimek Ö., Akkaya S. T., Bıçakçıoğlu K., Anıl Ö.

Construction and Building Materials, cilt.458, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 458
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.conbuildmat.2024.139595
  • Dergi Adı: Construction and Building Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Communication Abstracts, Compendex, INSPEC, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Aerated concrete, Bond-slip, Clay brick, Digital image correlation, Hollow brick, Interface material model, Masonry structures, Strengthening, TRM strip
  • Ankara Üniversitesi Adresli: Evet

Özet

In recent years, the use of Textile Reinforced Mortar (TRM) strips for strengthening masonry structures has become increasingly common. A key failure mechanism in these strengthened structures is the debonding of TRM strips from the surface. This study aims to investigate the interfacial behavior between TRM strips and various masonry walls, developing interfacial bond stress-slip displacement models for numerical analysis. Understanding this interfacial behavior is crucial for capacity calculations of strengthened elements using numerical analysis software. The study involved 48 specimens produced from hollow brick, solid clay brick, and aerated concrete. Variables included strip bond length, strip width, anchorage usage, and mortar type. The interfacial bond-slip behavior of TRM strips were experimentally measured and analyzed. Maximum bond stress, residual stress, stiffness and energy dissipation capacity were calculated for each specimen from the experimental data. Additionally, strain distributions on the strip surfaces were obtained using the Digital Image Correlation (DIC) method, an optical measurement system. From the experimental results, six interfacial constitutive bond stress-slip displacement models were proposed for three types of masonry wall surfaces, both with and without anchors. These models can be integrated into finite element method software for retrofit design, enhancing the reliability and accuracy of TRM-reinforced masonry structure analysis in structural engineering applications.