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See detailDetermination of the rheological characteristics of Self-Compacting Concrete at different temperatures
Waldmann, Danièle UL; Weisheit, Sandro UL

in Abstract book of 3rd Congress of the International Federation for Structural Concrete (fib) (2010)

Detailed reference viewed: 56 (6 UL)
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See detailDesign model for sfrc flat slabs with openings in the column area
Michels, Julien UL; Waldmann, Danièle UL

in Abstract book of 3rd Congress of the International Federation for Structural Concrete (fib) (2010)

Detailed reference viewed: 61 (9 UL)
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See detailStatische und dynamische Zustandsbewertung von Stahlbetonbauteilen
Bungard, Volker UL; Waldmann, Danièle UL

in Abstract book of 51. Forschungskolloquium des Deutschen Ausschusses für Stahlbetonbau (2010)

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See detailEntwicklung von hybriden Wärmedämmsteinen aus LAC
Leufgens, Nadine UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Mauerwerk (2010), 14(1), 10-18

Detailed reference viewed: 98 (7 UL)
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See detailUntersuchungen zur Oberflächenqualität von Selbstverdichtendem Beton
Weisheit; Waldmann, Danièle UL; Greger, Manfred UL

Scientific Conference (2010)

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See detailThermal comfort of a new university building in Luxembourg with passive cooling
Thewes, Andreas UL; Maas, Stefan UL; Scholzen, Frank UL et al

in Thermal comfort of a new university building in Luxembourg with passive cooling (2010)

The new Luxembourgish university buildings should comply with a low energy standard, which was defined for typical offices and smaller lecture rooms by a thermal end-energy lower than 14 kWh/m3a and an ... [more ▼]

The new Luxembourgish university buildings should comply with a low energy standard, which was defined for typical offices and smaller lecture rooms by a thermal end-energy lower than 14 kWh/m3a and an electricity use for HVAC and lighting of max. 6 kWh/m3a. Consequently it was necessary to find ways to avoid the need for mechanical ventilation and air-conditioning. The heat consumption was minimized by an air-tight and well insulated building envelope. A difficulty was posed by special outside façade elements which were set-up as a grid over the complete outer surface as an architectural element. To prevent the risk of overheating during summer, it is necessary to reduce the solar gains by optimizing the window sizes and the glazing types, as well as through the installation of movable indoor shading elements. Nevertheless enough daylight should enter the rooms to limit the consumption of electricity for artificial lighting. Hence detailed dynamic simulations were performed using TRNSYS and TRNFLOW to ensure thermal comfort without active cooling. The effective electricity consumption of a newly installed state-of-the-art lighting system, including presence detectors and daylight controllers for dimming, was measured in a test installation to determine the internal loads by lighting. Radiation and illuminance measurements were performed on sample elements of the façade grid. The results were used to verify the daylight simulations and to analyze the benefits of daylight controllers. Several iterative steps were taken to gradually improve the building by introducing different modifications, e.g. reduction of the window sizes, installation of a lighting control system, improving the night ventilation and effective use of the thermal inertia of the building. [less ▲]

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See detailAcoustics During the Vibratory Pile Driving of Sheet Piles: Measurement Conditions and Key Parameters of the Noise Generation
Hanus, Vincent UL; Zürbes, Arno; Maas, Stefan UL et al

in Acta Acustica United with Acustica (2010), 96(1-1),

This paper studies the sound generation during the vibratory pile driving of double sheet piles for different crosssections with the aims to give guidelines how to make high-quality acoustic measurements ... [more ▼]

This paper studies the sound generation during the vibratory pile driving of double sheet piles for different crosssections with the aims to give guidelines how to make high-quality acoustic measurements and to find the keyparameters in this noise generation. These objectives are reached by studying the assumed hypotheses when performing the acoustic measurements and by using a beamforming system; details about the vibratory pile driving are also given to obtain reproducible and representative measurements. The experiment results confirm some previouslypresented hypotheses and show two key parameters involved in the sound generation: the space between the welds of the common interlock of a double sheet pile and the wall height above the soil of a neighbouring wall. [less ▲]

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See detailDynamic simulations to develop a natural ventilation concept for an office building
Thewes, Andreas UL; Maas, Stefan UL; Scholzen, Frank UL et al

in 8th International Conference on System Simulation in Buildings (2010)

The Sustainability Group of the University of Luxembourg defined for their new buildings a maximum thermal end-energy of 14 kWh/(m3a) and an electricity consumption for HVAC and lighting below 6 kWh/(m3a ... [more ▼]

The Sustainability Group of the University of Luxembourg defined for their new buildings a maximum thermal end-energy of 14 kWh/(m3a) and an electricity consumption for HVAC and lighting below 6 kWh/(m3a). Therefore it was necessary to avoid active cooling loads and mechanical ventilation in the offices and small lecture rooms. The well insulated and air-tight façade, including special outside shading elements which were designed as a grid over the complete building envelope, was an essential given architectural element of the building. Therefore further external shading devices were not applicable. The only possibility to have an influence on solar gains was to optimize the window size, the glazing type and potentially an internal shading device. Furthermore, to prevent the risk of overheating during the summer period, it was necessary to reduce the internal gains from lighting and IT-equipment. Hence detailed dynamic simulations using TRNSYS and TRNFLOW were done to evaluate the thermal comfort without air-conditioning and mechanical ventilation. The effects of optimizations like a state-of-the-art lighting control system or a window-based night ventilation, as well as the influence of the effective thermal inertia of the building were analyzed. The assumed natural ventilation rates were calculated by combining TRNFLOW and TRNSYS simulations and by the software LESOCOOL. [less ▲]

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See detailTragverhalten von Flachdecken aus Stahlfaserbeton im negativen Momentenbereich und Bemessungsmodell für das Gesamtsystem
Michels, Julien; Waldmann, Danièle UL; Maas, Stefan et al

in Beton- und Stahlbetonbau (2010)

Detailed reference viewed: 51 (1 UL)
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See detailRotameter: A Non-Invasive and Simple Device for an In Vivo Analysis of Rotational Knee Laxity
Njingoue, Simon; Maas, Stefan; Zürbes, Arno et al

in 44th Gesellschaft für Biomedizinische Technik (DGBMT) (2010)

Detailed reference viewed: 23 (2 UL)
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See detailAmbient Vibration and Forced Excitation Tests of a Composite Bridge: Environmental influences and nonlinear effects on the dynamic properties
Bungard, Volker UL; Mahowald, Jean UL; Waldmann, Danièle UL et al

in Proceedings of the International Conference on Noise and Vibration Engineering, ISMA (2010)

Detailed reference viewed: 71 (18 UL)
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See detailComparison of linear and nonlinear static and dynamic behaviour of prestressed and non-prestressed concrete slab elements
Mahowald, Jean UL; Bungard, Volker UL; Maas, Stefan UL et al

in Proceedings of the International Conference of Noise and Vibration Engineering (2010)

Detailed reference viewed: 63 (19 UL)
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See detailInvestigation of constructions confronted with changing utilization by in situ loading tests.
Waldmann, Danièle UL

in Concrete 21st Century Superhero (2009)

Detailed reference viewed: 42 (9 UL)
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See detailSteel fiber reinforced concrete: Combining different fibers and amount of fiber reinforcement
Savvaidis, Dimitrios UL; Waldmann, Danièle UL

in Abstract paper of 4th Saar-Lor-Lux Colloquium in Mechanics (2009)

Detailed reference viewed: 67 (8 UL)
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See detailUntersuchung von verschiedenen Ausführungsvarianten von Abdeckplatten der Kabelkanäle des Tunnels "Grouft".
Waldmann, Danièle UL; Michels, J.

in BFT international : concrete plant + precast technology (2009), 75

Detailed reference viewed: 49 (4 UL)
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See detailMarket study of improved heat-insulating masonry bricks.
Waldmann, Danièle UL; Leufgens, Nadine UL; Maas, Stefan UL et al

in Concrete 21st Century Superhero (2009)

Detailed reference viewed: 35 (5 UL)