Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Elegant glass bridge at Portuguese research centre benefits from the high performance of DuPont™ SentryGlas® interlayer

04.03.2011
A visual highlight of the Champalimaud Foundation´s recently-completed biomedical research facility in Lisbon, Portugal is the lightweight steel and glass bridge that connects its two buildings.

The glass envelope encasing the bridge consists of curved panels of laminated glass made with DuPont™ SentryGlas® interlayer, specified by the structural engineers Schlaich Bergermann und Partner and the specialist contractor Bellapart on the basis of its decreased deflection and superior post breakage behaviour as compared to laminates made with PVB. Moreover, the proximity of the research facility to the sea meant that the excellent weathering and durability performance of laminates made with SentryGlas® were further criteria for their selection.


Photo (a): Bellapart
The two buildings at the ‘Champalimaud Centre for the Unknown’ are connected by a lightweight steel and glass bridge encased by curved panels of laminated glass made with DuPont™ SentryGlas® interlayer. The stiff and strong high-performance interlayer from DuPont was specified for the installation on the basis of its decreased deflection and superior post breakage behaviour as compared to laminates made with PVB.


Photo (b): Bellapart
The curved glass envelope for the bridge consists of several laminated glass panels, each typically measuring 1950x1320mm, which are held in place by four custom-designed clamp plates located at the glass vertices. Vertical steel rings positioned at every two meters along the envelope are used for its support.

The ‘Champalimaud Centre for the Unknown’ was designed by Charles Correa Associates of Mumbai, India, and comprises two buildings set in a large public area that accommodate treatment units, research laboratories, an auditorium and exhibition area as well as the offices of the Champalimaud Foundation itself. The buildings are connected by a 21-meter-long steel and glass bridge, implemented by Schlaich Bergermann und Partner of Stuttgart, Germany, Prof. Schneider from TU Darmstadt, Germany and Bellapart of Olot, Spain. The curved glass envelope for the bridge consists of several laminated glass panels, each typically measuring 1950x1320mm and produced by the Spanish laminator Cricursa using a comparatively lightweight construction of 8 mm tempered HST glass + 2.28 mm SentryGlas® interlayer + 8mm tempered HST glass. The panels are held in place by four custom-designed clamp plates from Bellapart, located at the glass vertices, whilst vertical steel rings positioned at every two meters along the envelope are used for its support.

Calculations by Schlaich Bergermann und Partner, carried out in partnership with Prof. Schneider of the TU Darmstadt, confirmed that in order to achieve a comparable rate of deflection in similarly-sized laminated glass panels using a PVB interlayer, glass thickness would need to be increased from 8+8 mm to 12+12 mm. Not only would this add significant weight to the installation, requiring a more substantial supporting structure, but it would also become difficult to achieve the required radius for the curved panels.

Familiar with SentryGlas® from previous projects, Bellapart repeated the glass load calculations for a laminated glass panel made with the DuPont interlayer to ensure compliance with safety requirements, as Carles Teixidor, industrial engineer at Bellapart explains: “Our own calculations verified the low rate of deflection of the laminated glass panels with SentryGlas®, below L/100 in the 8mm + 8mm construction, which is achieved despite exposure to quite high wind loads resulting from its geometry as well as its proximity to the sea. Moreover, the excellent post-breakage performance of laminated tempered glass with SentryGlas® in the event of failure of non-vertical installations was key: thanks to the high stiffness and limited creep of the interlayer, there is an extended period between the potential failure of the two glass components and the detachment of the panel from its fixings, enabling more time for its repair or replacement and limiting the potential for danger to passers-by.” With the bridge being installed just a few metres from the sea, the superior edge stability of SentryGlas® also came to the fore on the glass panels with open edges at either end of the bridge. “There was no weather seal used to protect these panels from the external environment, yet the outstanding edges stability of SentryGlas® will ensure that no appreciable edge delamination and no measurable moisture intrusion occurs,” confirms Carles Teixidor.

The ‘Champalimaud Centre for the Unknown’ is located on a 60,000m2 site in the Belém district of Lisbon, where the Tagus River flows into the Atlantic Ocean. Its location is of particular historical significance, being the place from where Portuguese pioneers set sail to discover the ‘unknown’ in the 15th and 16th centuries. The purpose of the multidisciplinary research centre is to leverage this historical heritage by creating a link between the discoveries of yesteryear and new scientific research in the fields of neurosciences and oncology. It was officially inaugurated on the 5th October 2010 by the President of the Republic of Portugal.

DuPont Glass Laminating Solutions provides materials, services and innovations to makers and specifiers of laminated glass. It helps create a better world by improving home protection and automotive safety, and enabling design of stronger, more energy-efficient buildings that let in more natural light.

DuPont is a science-based products and services company. Founded in 1802, DuPont puts science to work by creating sustainable solutions essential to a better, safer, healthier life for people everywhere. Operating in more than 90 countries, DuPont offers a wide range of innovative products and services for markets including agriculture and food; building and construction; communications; and transportation.

The DuPont Oval, DuPont™ and SentryGlas® are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

DuPont media contact:
Birgit Radlinger
Telephone: +49 6102 18-2638
Email: Birgit.Radlinger@dupont.com

Birgit Radlinger | DuPont
Further information:
http://www.dupont.com

More articles from Architecture and Construction:

nachricht Flexible protection for "smart" building and façade components
30.11.2016 | Fraunhofer-Institut für Silicatforschung ISC

nachricht Healthy living without damp and mold
16.11.2016 | Fraunhofer-Gesellschaft

All articles from Architecture and Construction >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>