In the present work, a new model of the FRP-concrete or masonry interface, which accounts for the coupling occurring between the degradation of the cohesive material and the FRP- body interface, is presented. A nonlocal damage and plasticity model is developed for the quasi- brittle material; a model which accounts for damage, unilateral contact and
The assessment of dynamic response and residual capacity of reinforced concrete (RC) columns to blast load is decisive for protection of buildings, especially regarding progressive collapse risk. In the case of explosive devices placed next to a critical structural element, complex and extreme loading is applied on the nearby system and the material response is
A three dimensional analysis of a drying test on a concrete-like material is presented. The analysis combines different tools, namely, X-ray microtomography of an ex situ experiment, image acquisition and processing, volume correlation to measure three dimensional displacement fields. It allowsinparticularmesoscopicstrainanalysestobeperformed. Bystudyingthecorrelationresiduals, it is also possible to study the damage mechanisms.
The paper considers the change of cement mortar microstructures due to sodium sulfate crystallization. The pressure generated during the crystallization, causes the deterioration of the solid skeleton of cement-based materials. The magnitude of stress induced by crystals growing in the pores strongly depends on the geometry of the system. The influence of salt crystallization on
This study presents an investigation to evaluate the crack propagation in the cracked concrete that is damaged due to alkali-silica reaction (ASR). We obtained the fracture energy and tension-softening curves of the ASR damaged concrete. Three-point bending tests for single notched concrete beams were carried out to determine the fracture properties. To detect the crack
The upcoming need of concrete structures designed against impulsive and extreme load due to natural hazards, industrial accidents or terrorists attack requires analytical modeling capable of reproducing material behavior in this range of loading. When a concrete structure is submitted to an impact or an explosion loading, material may be submitted to high triaxial compression
Despite the large number of studies, the mechanisms involved during creep of concrete are still not well known and particularly tensile creep which is a major issue especially in the case of special concrete structures. The objective of this study is to suggest an assessment of the damage mechanisms occurring during the different phases of
It has been commonly agreed that the crack propagation within concrete structures can be realistically simulated by non-local damage models. Due to their low complexity and computa- tional cost, simplified damage models are frequently used in virtual testing calculations of structural health monitoring applications. This contribution aims at justifying the application of such simplified damagemodelsforearly
Modelling fracture in concrete or masonry is known to be problematic regarding the robustness of iterative solution procedures and, the use of non-iterative methods (or that minimize the use of iterations) in quasi-brittle materials is now under strong development, due to the necessity to obtain effective results in finite element analysis [1, 2] where strong
The study described in this paper was based on some recently published results of research on the behaviour of high-performance concrete in three-point bending tests carried out on notched specimens at various testing temperatures. In this study, the trends in the stress intensity factor and the fracture energy of the concrete with increasing testing temperature