Strength Prediction of Concrete Confined Through Textile Reinforced Cementitious Composites
摘要
The use of textile reinforced cementitious composites (TRCCs) has garnered significant attention in recent years due to their potential to enhance the strength and durability of concrete structures. TRCCs incorporate high-strength textiles embedded within a cementitious matrix, and one of their main applications is to provide confinement to existing concrete elements. The mechanical behavior of TRCCs confined-concrete exhibits different stress-strain responses influenced by factors such as initial unconfined strength, cross-sectional shape and dimensions, fiber material, amount of confinement provided, etc.. Numerous studies have investigated experimentally the mechanical behavior, durability, and effectiveness of TRCC in improving the load-bearing capacity and ductility of confined concrete. In addition, various confinement models, both empirical and analytical approaches, have also been proposed to predict the compressive strength of confined concrete. This study examines the axial behavior of TRCC-confined concrete, focusing on the influence of different parameters on stress-strain behavior and overall confinement effectiveness. The accuracy of existing confinement models is evaluated using an extensive dataset of experimental results. Additionally, a novel formulation for predicting confined strength, recently proposed by the authors, is presented. The findings underscore the complexity of accounting for all parameters influencing TRCC-confined concrete behavior and demonstrate that the proposed formulation provides good accuracy and reliability when compared to the experimental data.