Flexural Capacity Prediction of Composite RC Members Strengthened with UHPC Based on Existing Design Models

Ultra-high-performance concrete (UHPC), a new generation of cementitious materials with very high strength, ductility, and durability, has been used for enhancing reinforced concrete (RC) structures as a strengthening material. The structural performance of RC members strengthened by UHPC or UHPC-concrete composite members is significantly improved. However, there are few methods for predicting the capacity of…

Finite Element Modelling to Predict the Flexural Behaviour of Ultra-high Performance Concrete Members

This paper presents a finite element (FE) modelling to predict the behaviour of ultra-high performance concrete (UHPC) members under static flexural loading. A plasticity-based constitutive model for concrete and an implicit solver in LS-DYNA were adopted in the numerical simulation. Experimental data for 21 UHPC specimens tested in the present study and in previous works…

Numerical Model for Predicting the Structural Response of Composite UHPC–concrete Members Considering the Bond Strength at the Interface

In this study, an improved finite element (FE) model was developed for the prediction of the structural behaviour of reinforced concrete members strengthened with ultrahigh-performance concrete (UHPC). A concrete damage model and an implicit solver in LS-DYNA were adopted in the numerical simulation. The model was calibrated and validated using experimental data. Accurately representing the…

Experimental Investigation on the Behaviour of Reinforced Concrete Slabs Strengthened with Ultra-high Performance Concrete

Nine rectangular specimens were tested to investigate the behaviour of composite reinforced concrete (RC) slabs strengthened with ultra-high performance concrete (UHPC). The specimens were two series with various UHPC strengthening configurations. The first, a rehabilitation series, tested UHPC as patch material for repairing deteriorated concrete structures. The second, a UHPC overlay series, was used to…

Repair and Strengthening Techniques for RC Structures

An adequate strength capacity for repair and strengthening of existing reinforced concrete (RC) structures has emerged as a big challenge for civil engineers. There are design guidelines such as ACI 440 for externally carbon fiber reinforced polymers (CFRP) but for concrete jacketing documents are very limited. This paper presents an overview of techniques for repair…