DBV-Guide to Good Practice. Steel Fibre Concrete. Edition October Original version: “DBV-Merkblatt Stahlfaserbeton” (German). Editor: German Society. DBV-Merkblatt Industrieböden, Stahlfaserbeton Guide to Good Practice – Steel Fibre Reinforced Industrial Concrete Floors – Special Features of the. DBV-Merkblatt Bemessungsgrundlagen für Stahlfaserbeton im Tunnelbau. Front Cover. Deutscher Beton-Verein. DBV, – 23 pages.
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The load combination of bending moment and compressive normal force is governing for the design in the ultimate Limit state.
Steel-fibre-reinforced segmental linings: State-of-the-art and completed projects – tunnel
In Germany, a The higher the moments occurring, the greater the necessary degree of reinforcement. Test specimen are generally tested by means of deflection-controlled test setups. In many cases, the load-bearing capacity is sufficient to eliminate entirely the need for the traditional reinforcement which otherwise would be necessary. It is of almost no significance how stahlfaerbeton cement and which aggregate and additives are used to achieve a particular compressive strength – cement is not just cement, and aggregate is not just aggregate!
Deutscher Beton- und Bautechnik-Verein e. The tunnel bores have an outer diameter of 9. The Hofoldinger Stollen In Germany, a It is therefore primarily used in elements which permit redistribution of internal forces, and therefore multiple crack-formation i.
Some features of WorldCat will not be available. Linked Data More info about Linked Data. The performance of steel wire fibres and, therefore, of the resultant steel-fibre-reinforced concrete, depends essentially on fibre diameter, fibre length, fibre anchorage, wire tensile dbv-merkblstt and delivery form.
Cancel Forgot your password? Serviceability is negatively affected if such spalling results in water-permeability. Don’t have an account? Also decisive is the selection of a tensile strength appropriate to the strength of concrete, in order to maintain the ductility of the steel-fibre-reinforced concrete. The various problems associated with steel fibres such as e.
The German society of concrete DBV recommendation  and the DAfStb guideline for steel-fibre-reinforced concrete  also foresee a four-point bending test. Joints are particularly critical points. Conventional reinforcement can be omitted entirely in cases in which load-bearing capacity is assured by the steel fibres alone.
In the case of steel-fibre-reinforced concrete for shotcrete, the steel fibres are added to the basic shotcrete concrete mix. Steel-fibre-reinforced concrete in cracked condition remains capable of transferring Loadings and taking up forces. The use of steel fibres provided an elegant and rapid solution, since production of segments was scheduled to start in a short time.
Steel-fibre-reinforced segmental linings: State-of-the-art and completed projects
The test procedure utilising statically determinate test beams provides a method suitable for conversion of the results to a design for cross-sectional capacity in the various states of construction, or for the M-N interaction diagram, for instance.
The segmental lining ring, consisting of six segments with a diameter of 3. Please choose whether or not you want other users to be able to see on your profile that this library is a favorite of yours. Lot T, with a length of approx. For further questions please contact our TIB customer service. Tests using ultra-modern equipment were performed in the context of this construction project, in order to investigate the performance of the segmental lining, and of the segment joints, in particular, under the load conditions prevailing in the tunnel.
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Stahlfaserbeon square panel positioned on all sides is statically indeterminate and simulates the load-bearing behaviour of a shotcrete shell. Advanced Search Watchlist Search history Search help. By means of the available calculation methods it is sometimes hardly possible to fugure out the ultimate material resistance, particulary if such elements are exposed to bursting and spalling forces.
Since this panel test determines a system load-bearing capacity, the result cannot be used for the dimensioning of individual elements e. You may have already requested this item. Finding libraries that hold this item Enhancement of cross-sectional load-bearing capacity Steel-fibre-reinforced concrete in cracked condition remains capable of transferring Dbv-merkbllatt and taking up forces.
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The panel test is not examined in any more detail in this dbv-megkblatt. Reading desks dbv-meroblatt facilities Computer workstations Printing — photocopying — scanning Wireless LAN Interactive whiteboards Study cubicles Workstation for the blind and visually impaired. The influence of the fibres on the strength of concrete is tested on a reference concrete, in order to provide the user with an idea of the performance of individual fibre types.
Essential properties of steel-fibre-reinforced concrete are its ductile material behaviour and its ability, in case of cracking, to assure load transfer across the crack. Concrete is classified by its strength in compression.