NUMERICAL SIMULATION OF STRESS AND DISPLACEMENT BEHAVIOR OF TRC-STRENGTHENED FRP-REINFORCED CORAL CONCRETE PANELS UNDER BLAST LOADING

  • Thi Thu Nga Nguyen Institute of Techniques for Special Engineering, Le Quy Don Technical University
  • Dinh Thanh Vu Institute of Techniques for Special Engineering, Le Quy Don Technical University
  • Xuan Bang Nguyen Institute of Techniques for Special Engineering, Le Quy Don Technical University
Keywords: Coral aggregate concrete, FRP-reinforced concrete, TRC-strengthened FRP-reinforced concrete panel, blast loading, numerical simulation

Abstract

This article presents a numerical simulation of the stress and displacement responses of coral aggregate concrete (CAC) slabs reinforced with glass fibre-reinforced polymer (GFRP) bars and externally strengthened with textile-reinforced concrete (TRC) under blast loading conditions. The panel consists of a B22.5-grade coral concrete core (equivalent to C35/45), combined with a surface TRC layer composed of a Sigratex Grid 350 carbon textile embedded in high-strength fine-grained concrete (grade M600). The integration of GFRP, TRC, and CAC offers advantages in terms of corrosion resistance, utilisation of locally available marine aggregates, and enhanced dynamic load resistance, making it a promising solution for coastal and island infrastructure subjected to blast effects. The simulation results demonstrate that the inclusion of the TRC layer significantly reduces both stress concentration and peak displacement at the panel’s centre. Moreover, it contributes to the confinement of localised damage zones caused by the propagation of blast-induced shock waves. This study provides valuable insights into the potential application of TRC-strengthened CAC structures in marine, military, and defence-related constructions.

điểm /   đánh giá
Published
2026-01-10
Issue
Vol. 8 No. 02 (2025)
Section
Bài viết