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Stay-in-Place Formwork of TRC Designed as Shear Reinforcement for Concrete Beams Vrije Universiteit Brussel
In order to reduce on-site building time, the construction industry shows an increasing interest in stay-in-place formwork with a reinforcement function after concrete hardening, such as CFRP formwork confinement for columns. The current combined systems however do not answer the demand of the building industry for a material system that is both lightweight and fire safe. High performance textile reinforced cement (TRC) composites can address ...
Potential of memory steel reinforcement for shear strengthening of concrete bridge girders with I-sections Universiteit Gent
This study was carried out to assess the performance of near surface mounted (NSM) memory steel reinforcement for shear strengthening of concrete girders with I-sections. Specially designed/strengthened concrete I-sections were tested in tension and the bond behaviour of memory steel was observed and reported as failure mode, load displacement and strain variation. It has been demonstrated that the memory steel reinforcement has a great ...
Bond behaviour of FRP shear reinforcement on I-sections Universiteit Gent
Although external fibre reinforced polymer (FRP) reinforcements are easy to manipulate around any shape, their behaviour varies with respect to the geometry of the strengthened cross sections. This is in particular the case for shear strengthening of I-sections, such as prestressed concrete girders. The externally bonded (EBR) FRP shear reinforcement is susceptible to early debonding around the internal angles at the web-flange interface. Due to ...
Development of an innovative type of shear connector dedicated to fully embedded steel-concrete composite columns - experimental and numerical investigations Universiteit Hasselt
A shear connection in steel-concrete composite columns is established in the normal case with headed shear studs. However, this type of connector has been developed for composite beams and in terms of composite columns, a wide range for an optimisation still can be identified due to the different geometries of steel profiles, concrete and reinforcement. The presented paper shows investigations on a new type of shear connector with a direct ...
Acoustic Emission Monitoring of Debonding of External Reinforcing Patches from Concrete Vrije Universiteit Brussel
The present study concerns the characterization of the fracture process in
concrete beams which are externally reinforced by means of composite materials. The reinforcement comes in the form of CFRP (Carbon Fiber Reinforced Polymer) strip and TRC (Textile Reinforced Cement) layer. In order to monitor the accumulation of fracture beneath the non-transparent layer, AE (Acoustic Emission) sensors are used. The results show that the different ...
concrete beams which are externally reinforced by means of composite materials. The reinforcement comes in the form of CFRP (Carbon Fiber Reinforced Polymer) strip and TRC (Textile Reinforced Cement) layer. In order to monitor the accumulation of fracture beneath the non-transparent layer, AE (Acoustic Emission) sensors are used. The results show that the different ...
Strengthening of an industrial cylindrical shell damaged by a collision KU Leuven
This case-study concerns an old industrial reinforced concrete shell structure at the port of Antwerp. The building serves as a pilot for stowing of shipped steel and wooden products. A fork-lift hit one of the supporting columns. The impact of the collision caused the concrete to crush and the internal reinforcement to shift considerably. Some of the internal reinforcement yielded or broke. Temporary supports had to be placed to avoid collapse ...
Meso-level textile composites simulations: Open data exchange and scripting KU Leuven
The article presents a user interface for modelling of textile composites, which combines open XML input and output formats with scripting for definitions of the reinforcement models under (local) shear, tension and compression deformations. The open input format (parameters of the textile reinforcement) allows easy integration of a meso-level (unit cell) textile processor upstream – with, for example, textile process modelling software or ...
Advancements in shear strengthening of prestressed concrete I-girders using fiber reinforced polymers Universiteit Gent
A number of attempts were made by different researchers in the last couple of decades to strengthen prestressed concrete (PC) I-girders in shear using externally bonded FRP (fibre reinforced polymer) reinforcement. The unanimous observation reported in the literature is the early debonding of FRP shear reinforcement around the internal angles of the I-section. Because of this undesirable phenomenon, the strength of the FRP is utilized ...
Micro-CT analysis of the internal deformed geometry of a non-crimp 3D orthogonal weave E-glass composite reinforcement KU Leuven
An investigation at the unit cell level of the sheared geometry of a single layer E-glass non-crimp 3D orthogonal woven reinforcement (commercialized under trademark 3WEAVE® by 3Tex Inc.) is performed by X-ray micro-computed tomography (micro-CT) observations. The aim is to observe, understand and quantify the effect of in-plane shear deformation on the composite reinforcement geometry, at meso-scale (i.e. unit cell level). It was observed that, ...