Spannbandbrücke mit Kohlenstofffaser‐Lamellen

Schlaich, Markus P.; Bleicher, Achim

doi:10.1002/bate.200710028

Cited by 40 publications

(12 citation statements)

References 2 publications

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“…1). In this project, the non-laminated strip-loop cables were used as the load bearing components -stress-ribbon strips (Schlaich, Bleicher 2007). In comparison with the laminated components, the strip-loop cables are characterized by a uniform strain distribution though reduced stiffness and increased creep (Liu et al 2015).…”

Section: Experimental Investigation On Stiffness and Strength Of Singmentioning

confidence: 99%

“…The first CFRP stress-ribbon bridge has been constructed in Germany in 2007 (Schlaich, Bleicher 2007). Figure 1 shows the test of the bridge conducted in the laboratory of TU Berlin.…”

Section: Motivation Of the Researchmentioning

confidence: 99%

“…Load test of the CFRP stress-ribbon bridge(Schlaich, Bleicher 2007) Pin-loaded anchorage system(Liu et al 2015): a -assembled; b -exploded schemes; c -internal view CFRP stress-ribbon strips: a -non-laminated strip-loop (Empa); b -the considered single-lap joint for the laminated loop Tested joints: a -geometry and distribution of the z-pins (dimensions are in mm); b -view on the specimens…”

mentioning

confidence: 99%

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Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Arnautov

Kulakov

Andersons

et al. 2016

The Baltic Journal of Road and Bridge Engineering

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Carbon fiber-reinforced polymer (carbon-polymer) is an advanced lightweight composite material with high strength and excellent resistance to corrosion and fatigue. Over the past decades, application of fiber-reinforced polymers has been spread from the aerospace to other branches of industry such as automobile and civil engineering. Unidirectional carbon-polymers have a high potential for replacing steel in tensile members. Recently, the first carbonpolymer stress-ribbon bridge has been constructed in Germany. The non-laminated strip-loop carbon-polymer thin strips were used as the load bearing components in this bridge. In comparison with the laminated components, the applied cables are characterized by a more uniform strain distribution though reduced structural integrity. Alternative jointing technologies of carbon-polymer laminates are considered in this paper with an intention to increase the structural integrity and reliability of the production. Tensile behavior of the single-lap joints was investigated experimentally. Three types of the joints were considered. Adhesive joint was set as the reference. The overlap region of the mechanically fastened joints was produced using 9, 25, or 36 steel needles (z-pins) of 1 mm diameter. The proposed hybrid joints were additionally connected with adhesive increasing the load-bearing capacity of the reference joint up to 230%. Concerning the brittle fracture of the adhesive counterparts, the extended progressive failure process within the hybrid joints is responsible for the improvement.

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Section: Experimental Investigation On Stiffness and Strength Of Singmentioning

confidence: 99%

“…The first CFRP stress-ribbon bridge has been constructed in Germany in 2007 (Schlaich, Bleicher 2007). Figure 1 shows the test of the bridge conducted in the laboratory of TU Berlin.…”

Section: Motivation Of the Researchmentioning

confidence: 99%

mentioning

confidence: 99%

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Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Arnautov

Kulakov

Andersons

et al. 2016

The Baltic Journal of Road and Bridge Engineering

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“…In this case, the damping is only active, when the load appears and the goal of this damping is to invert the oscillation of the load. This approach has already been realized by the "Institute of Conceptual and Structural Design" of the Technische Universität Berlin (TUB) through applying artificial muscles to a stress ribbon bridge [2]. In the case of our stay cables this means to optimize geometries and to use intelligent microstructures on surfaces of the structural elements.…”

Section: Introductionmentioning

confidence: 99%

Thermography investigations and numerical analysis of turbulent and laminar flow at light weight structures

Arndt

Gaulke

2008

SPIE Proceedings

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Thermography (IR) allows global visualization of temperature distribution on surfaces with high accuracy. This potential can be used for visualization of fluid mechanics effects at the intersection of laminar and turbulent flows, where temperature jumps appear due to convection and friction i.e. for the optimization in the design of airplane geometries. In civil engineering too it is the aspiration of the modern engineer of light weight structures to meet singular loads like wind peaks rather by intelligent structures and materials than by massive structures. Therefore the "Institute of Conceptual and Structural Design" of the Technical University of Berlin (TUB) is working on the development of adaptive structures, optimized geometry and intelligent microstructures on surfaces of structural elements.The paper shows the potential of modern computational fluid dynamics (CFD) in combination with thermography (IR) to optimize structures by visualization of laminar-tumultuous border layer currents. Therefore CFD simulations and IR wind tunnel experiments will be presented and discussed. For simulations and experiments -artificial and structural elements of the cable-stayed Strelasund Bridge, Germany, are used.

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“…envisaged the use of prestressed FRP straps in bridge repair for 'active shear strengthening, for end anchorage systems of tensioned CFRP strips, for flexural strengthening and for external post-tensioning'.FlexureTo date, the research effort devoted to incorporating CFRP strap tensile elements in flexural applications for new and existing concrete structures has been rather limited. However, a recent innovation by Schlaich and Bleicher has been to use non-laminated CFRP straps in the development of a prototype for a stress-ribbon bridge(Schlaich and Bleicher 2007). The 13 m bridge (seeFig.…”

mentioning

confidence: 99%

Nonlaminated FRP Strap Elements for Reinforced Concrete, Timber, and Masonry Applications

Lees

Winistörfer

2011

J. Compos. Constr.

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Advances in material technology allow for the exploration of new structural forms and systems. In recent years, fibre reinforced polymers (FRPs) have emerged as candidate materials for civil engineering applications and the use of FRPs in construction has been an area of growing interest. Unidirectional high strength FRPs are well-suited for use as tensioning elements but anchorage details present a challenge. An alternative is to self-anchor the FRP tensioning element by winding thin layers of material around supports and then laminating all the layers together (a laminated strap) or by securing only the outermost layer to form a closed outer loop while the inner layers remain non-laminated (a non-laminated strap). Non-laminated FRP straps have been found to have higher efficiencies than equivalent laminated straps which is advantageous in high tension applications. The suitability of non-laminated FRP straps for use as unbonded tension elements provides scope for usage in new construction and for the strengthening of existing structures. A review of non-laminated carbon FRP strap system properties and applications in the context of reinforced concrete, timber and masonry structures is presented.

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Spannbandbrücke mit Kohlenstofffaser‐Lamellen

Cited by 40 publications

References 2 publications

Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

Thermography investigations and numerical analysis of turbulent and laminar flow at light weight structures

Nonlaminated FRP Strap Elements for Reinforced Concrete, Timber, and Masonry Applications

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