Norbert Randl
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View article: Assessment of Methods to Derive Tensile Properties of Ultra-High-Performance Fiber-Reinforced Cementitious Composites
Assessment of Methods to Derive Tensile Properties of Ultra-High-Performance Fiber-Reinforced Cementitious Composites Open
There is no unified method for deriving the tensile properties of fiber-reinforced ultra-high-performance cementitious composites (UHPCC). This study compares the most common material tests based on a large series of laboratory tests perfo…
View article: Experimental investigation on shear strengthening with fiber/textile reinforced concrete
Experimental investigation on shear strengthening with fiber/textile reinforced concrete Open
The use of textile reinforced concrete (TRC) as a shear strengthening solution for reinforced concrete (RC) structures is a viable and effective strategy. The low tensile strength of the cementitious matrix used to produce TRC, however, ca…
View article: Innovative shear strengthening with post-installed undercut anchors
Innovative shear strengthening with post-installed undercut anchors Open
Shear strengthening of existing structures is a rather difficult task with respect to the short available anchorage length in the structural member and the target of reasonable activation of the strengthening element before the rather brit…
View article: Enhancing Textile Reinforced Concrete materials by admixing short dispersed fibres
Enhancing Textile Reinforced Concrete materials by admixing short dispersed fibres Open
Textile Reinforced Concrete (TRC) is a material consisting of a high-performance fabric embedded in a cementitious matrix. It has been widely studied for new thin-walled structures and strengthening and retrofit applications. The low tensi…
View article: Experimental investigation on strengthening of RC members with HSC overlays
Experimental investigation on strengthening of RC members with HSC overlays Open
High performance concretes (HPC) with higher compressive strength are particularly suitable for subsequently generating reinforcing overlays on existing structures. The aim of the herein presented research was to experimentally demonstrate…
View article: Shear strengthening with F/TRC: Experimental investigation on real scale RC beams
Shear strengthening with F/TRC: Experimental investigation on real scale RC beams Open
Shear strengthening of existing structures is a key activity in ensuring adequate safety. Shear deficient Reinforced Concrete (RC) elements exhibit rather brittle failures which can lead to disastrous consequences. Furthermore, even elemen…
View article: Investigation of the Failure Modes of Textile-Reinforced Concrete and Fiber/Textile-Reinforced Concrete under Uniaxial Tensile Tests
Investigation of the Failure Modes of Textile-Reinforced Concrete and Fiber/Textile-Reinforced Concrete under Uniaxial Tensile Tests Open
Recently, innovations in textile-reinforced concrete (TRC), such as the use of basalt textile fabrics, the use of high-performance concrete (HPC) matrices, and the admixture of short fibers in a cementitious matrix, have led to a new mater…
View article: Experimental study of fibre-reinforced TRC shear strengthening applications on non-stirrup reinforced concrete T-beams
Experimental study of fibre-reinforced TRC shear strengthening applications on non-stirrup reinforced concrete T-beams Open
Textile Reinforced Concrete (TRC) materials have proven to be not only a viable solution, but also an effective one when used to strengthen Reinforced Concrete (RC) structures. The main drawbacks associated with this type of composites is …
View article: DIC-based failure analysis of high-strength continuous steel shear dowels for composite UHPFRC steel construction
DIC-based failure analysis of high-strength continuous steel shear dowels for composite UHPFRC steel construction Open
Continuous composite dowel strips in reinforced concrete composite members allow effective force transmission of shear forces between steel web and concrete. The use of high-performance materials imposes new demands on the performance of s…
View article: Effect of TRC and F/TRC Strengthening on the Cracking Behaviour of RC Beams in Bending
Effect of TRC and F/TRC Strengthening on the Cracking Behaviour of RC Beams in Bending Open
The increasing demand on the performance of existing structures, together with their degradation, is among the main drivers towards the development of innovative strengthening solutions. While such solutions are generally aimed at increasi…
View article: Overlapped joints in Textile Reinforced Concrete with UHPC matrix: An experimental investigation
Overlapped joints in Textile Reinforced Concrete with UHPC matrix: An experimental investigation Open
When producing a Textile Reinforced Concrete structure or element, joining separate textile layers might be a necessity, driven for example by the limited dimensions of commercially available fabrics. A possible way of producing such joint…
View article: Bond-Slip Behavior between Stainless Steel Rebars and Concrete
Bond-Slip Behavior between Stainless Steel Rebars and Concrete Open
Maintenance of reinforced concrete structures is a prevailing topic, especially with regard to lifeline structures and bridges, many of which are now designed with a service life beyond 100 years. Reinforcement made of ordinary (carbon) st…
View article: Innovative approaches for strengthening existing concrete structures
Innovative approaches for strengthening existing concrete structures Open
The demand of effective and low-invasive methods for strengthening existing concrete structures is continuously increasing due to the ageing infrastructure. High performance materials can beneficially be applied to provide sustainable and …
View article: Effect of Combining Fiber and Textile Reinforcement on the Flexural Behavior of UHPC Plates
Effect of Combining Fiber and Textile Reinforcement on the Flexural Behavior of UHPC Plates Open
A series of flexural tests were performed in order to investigate the effect of steel fiber reinforcement (SFR) in textile‐reinforced concrete (TRC) plates. Some of the specimens were reinforced only with textile, some of them only with fi…
View article: An Advanced Approach to Derive the Constitutive Law of Uhpfrc
An Advanced Approach to Derive the Constitutive Law of Uhpfrc Open
More than 200 specimens were tested in a comprehensive experimental campaign using ultra-high performance concrete with a mean compressive strength between 150 and 210 MPa and with different amounts of steel fibre reinforcement (0%, 1% and…