References of "Maas, Stefan 50002241"
     in
Bookmark and Share    
Full Text
Peer Reviewed
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: 93 (7 UL)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 137 (17 UL)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 195 (8 UL)
Full Text
Peer Reviewed
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)
Full Text
Peer Reviewed
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)
Full Text
Peer Reviewed
See detailMechanical material properties of polymethylmethacrylate (PMMA) für medical applications
Thielen, Thomas UL; Maas, Stefan UL; Zürbes, Arno UL et al

in Materials Testing = Materialprüfung (2009), 51(4), 203-209

Detailed reference viewed: 90 (5 UL)
Full Text
Peer Reviewed
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)
Full Text
Peer Reviewed
See detailDevelopment of a reinforced PMMA-based hip spacer adapted to patients' needs
Thielen, Thomas UL; Maas, Stefan UL; Zürbes, Arno UL et al

in Medical Engineering & Physics (2009), 31(8), 930-936

Detailed reference viewed: 82 (8 UL)
Full Text
Peer Reviewed
See detailEntwicklung einer Hüftinterimsprothese (Spacer) mittels FE-Analyse unter Berücksichtigung der Muskel- und Gelenkkräfte aus AnyBody®.
Thielen, Thomas UL; Maas, Stefan UL; Zürbes, Arno UL et al

in Conference & 27. CADFEM Users´ Meeting in Leipzig, November 2009 (2009)

Detailed reference viewed: 96 (6 UL)
Full Text
Peer Reviewed
See detailComparison of static behaviour and nonlinear vibration characteristic of gradually damaged prestressed concrete slabs and reinforced concrete beams
Bungard, Volker UL; Waltering, Markus UL; Waldmann, Danièle UL et al

in Proceedings of the International Conference on Experimental Vibration Analysis for Civil Engineering Structures (2009)

Detailed reference viewed: 48 (14 UL)
Full Text
Peer Reviewed
See detailStructural Health Monitoring of a Composite Bridge
Bungard, Volker UL; Waltering, Markus UL; Waldmann, Danièle UL et al

in International Modal Analysis Conference (IMAC-XXVI) (2008)

Detailed reference viewed: 59 (14 UL)
Full Text
Peer Reviewed
See detailDamage assessment of a gradually damaged pre-stressed concrete bridge using static load tests and non-linear vibration characteristic
Waltering, Markus UL; Bungard, Volker UL; Maas, Stefan UL et al

in International Conference on Noise and Vibration Engineering (2008)

Detailed reference viewed: 80 (13 UL)
Full Text
Peer Reviewed
See detailNon-destructive Damage Assessment Using Non-linear Vibration
Waltering, Markus UL; Bungard, Volker UL; Maas, Stefan UL et al

in International Modal Analysis Conference, IMAC-XXVI (2008)

Detailed reference viewed: 69 (17 UL)
Full Text
Peer Reviewed
See detailBearing capacity of SFRC flat slabs with openings in the column area: experimental and numerical investigation
Michels, Julien UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the 7th RILEM-Symposium of Fiber Reinforced Concrete (2008)

Detailed reference viewed: 64 (4 UL)
Full Text
Peer Reviewed
See detailCapacité portante de planchers-dalles en béton de fibres
Michels, Julien UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the 26th meeting of the Association Universitaire du Génie Civil (2008)

Detailed reference viewed: 65 (4 UL)
Full Text
Peer Reviewed
See detailBearing capacity of SFRC-flat slabs
Michels, Julien UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the 7th RILEM-Symposium on Fiber Reinforced Concrete (2008)

Detailed reference viewed: 68 (6 UL)