TÓM TẮT NGHIÊN CỨU THỰC NGHIỆM Hussein
FLEXURAL BEHAVIOR OF REINFORCED CONCRETE BEAM STRENGTHENED WITH TEXTILE REINFORCED CONCRETE Strengthening of reinforced concrete structures using textile reinforced concrete (TRC) has emerged as a viable technique to retrofit/repair deteriorated structures. In this study, the flexural performance of concrete beams strengthened with TRC has been investigated by means of a finite element analysis on ABAQUS software. The work reported in this paper deals with the analytical models, proposed to predict the behavior of reinforced concrete beam strengthened with externally bonded TRC layers. The surface – based cohesive behavior is also captured to represent the interfacial bonding between TRC and concrete substrate. The results of the numerical simulations are used to validate the experimental results. .
Flexural strengthening of RC beams using textile reinforced mortar – Experimental and numerical study
Abstract In this paper, the effectiveness of textile reinforced mortars (TRMs), as a means of increasing the flexural capacity of reinforced concrete (RC) beams, is experimentally and numerically investigated. A new type of textile (basalt-based textile) was used as strengthening material. The studied parameters included type of mortar, number of TRM layers and type of strengthening material: TRM versus carbon fiber-reinforced polymer (CFRP) composites. A total of six beams were tested under four-point bending till failure. Two beams were used as control specimens. Three beams were externally upgraded by TRM sheets for enhancing their flexural capacity; and one beam was strengthened with CFRP laminates for comparison with its TRM counterpart. Besides the experimental program, a numerical investigation utilizing nonlinear finite element (FE) analysis was carried out using LS-DYNA software. In addition to the six beams tested in this study, another three beams were collected from the literature for the purpose of finite element validation. A comparison was made between the experimental and numerical results and good agreement was obtained. Based on the validation of FE results, the numerical analysis was extended to include additional cases to study the flexural enhancement of RC beams using more TRM layers with different end anchorages.
Load–bearing behaviour and simulation of textile reinforced concrete
The new composite material Textile Reinforced Concrete (TRC) is a promising development which may open up entirely new fields for the application of the construction material concrete. The possible more filigree structures with high quality surfaces make TRC an attractive choice for the architect and give the engineer more freedom in design. However, the use of TRC requires design rules which are currently being developed at RWTH Aachen University, Germany. In this article, recent experimental results as well as modeling techniques are described.