CU2105

More documents

Recommendations

Info

CASE study Rising from the ashes Side view of Notre-Dame 3D visualisation. Credit: Autodesk, Inc. The restoration of Notre-Dame Cathedral in Paris embraces digital technology and building information modeling using Autodesk's cloud computing services, design and building applications and technical expertise. The gutting by fire of the Notre-Dame Cathedral was a catastrophe that shook the world. One of the most recognisable buildings in Paris, the Gothic masterpiece was built on the ruins of two earlier churches under the instructions of Maurice de Sully, the bishop of Paris, who in 1160 conceived the idea of converting the two former buildings into a single building. The foundation stone was laid by Pope Alexander in 1163 high altar consecrated in 1189. The choir, western façade and the nave were added over the next 100 years. During the last couple of centuries, though it fell into some disrepair, most notably to the central spire, which had to be rebuilt in the 19th century having been removed because of instability in the 18th Century. Napoleon is also said to have saved it from destruction when he chose it for his coronation as Emperor of the French in 1804. It is famous for its large clerestory windows which were added in 1235-1270 and the boldness and grace of its singlearch flying buttresses - and also for the romantic story written by Victor Hugo, The hunchback of Notre-Dame, with the Cathedral as its centrepiece. However, during another restoration on the spire in 2019 on April 15th a fire broke out in the Cathedral's attic. The massive blaze destroyed most of the roof, Viollet-le- Duc's 19th-century spire, and some of the rib vaulting. THE RESTORATION We are fortunate in that the majority of suggestions as to what we should do with the burned out shell of the Cathedral were quickly discounted, including one suggestion that included a swimming pool in the roof of the nave. On closer examination of the damage - a lot of which consisted of molten sections of scaffolding and the effects the twisting of the metal had on the spire - it was suggested that a full restoration project was feasible. This was commenced early in 2020, but halted soon after for three months because of the Covid-19 pandemic. On June 8, 2020, therefore, construction resumed on Notre- Dame Cathedral, focusing on the removal of the 30,000 burned out scaffolding tubes - weighing 300 tons - that had surrounded the spire. On July 9, the chief architects of Historical Monuments presented restoration plans for Notre-Dame Cathedral to the National Commission for Heritage and Architecture (CNPA), the advisory council that handles important restoration projects in France. The study presented plans that respected the previously existing structure of the Cathedral and to restore the monument to its last complete, coherent and known state. This included rebuilding a spire identical to the one designed in the 19th century by architect Eugene Viollet-le-Duc, returning the Cathedral's appearance to how it existed before the fire. Rebuilding efforts will also use original materials such as wood for the roofing. The report states that these restoration methods will ensure the authenticity, harmony and coherence of this masterpiece of Gothic architecture. AUTODESK EXPERTISE To assist in the restoration, the public body tasked with the project announced its patronage with Autodesk, who will be responsible for contributing design and construction technology solutions, including Building Information Modeling (BIM) support, an intelligent data and 30 May/June 2021
CASEstudy Notre-Dame visualisation close-up. Credit: Autodesk, Inc. Notre-Dame at sunset. Credit: Autodesk, Inc. geometry 3D modeling process, and technical expertise. The use of BIM creates a historical digital record for increased resiliency for future events and restoration - and to mitigate against the risk of further catastrophes. To take advantage of an innovative digital approach for the restoration, and to ensure effective collaboration between Autodesk and other companies involved in the project, Autodesk's Cloud technology was used to provide a common data environment (CDE) which served as a central repository for all project information. All permitted stakeholders had access, therefore, to the latest data and plans. Very fortunately, data created using reality capture technologies prior to the fire enabled Autodesk to create a 3D BIM model of the Cathedral as it existed before the catastrophic event, thanks no doubt due to current trends that use the latest technology for capturing 3D images of cityscapes and other notable buildings. Autodesk was able to use the most recent reality capture scans of the Cathedral to create 3D models post-fire for comparison, part of the revolutions in digital mapping, visualisation software, virtual reality and cloud computing used to create a "virtual twin" of Notre-Dame. Regarding the project, Nicolas Mangon, Autodesk Vice President of Business Strategy for Architecture, Engineering and Construction Design Solutions, said that "The world has witnessed the destruction of many of the world's most historic monuments through natural and humancreated disasters. As this project demonstrates, it is important to digitise these historic sites before an event occurs that may damage or destroy them completely." He added that the pre-fire 3D model of Notre-Dame was created through unique scanning technologies, with Autodesk commissioning a team to deploy reality capture tools to digitally scan the building. The team took tens of thousands of measurements and images of the monument, resulting in billions of data points on the exact specifications of the building. All this information sits in a central 3D model that enables all project stakeholders to have access to the latest data and plans for the project. Arnaud Lemaire, Project Director of the EPA added that "Being able to create a 3D model of the Cathedral not only helps with restoration efforts to restore Notre- Dame by 2024, it also provides us greater resilience and preserves this heritage monument for future generations. Through this partnership with Autodesk, we are putting technologies at the heart of the monument's preservation so the world may see how important it is to protect our most cherished monuments to our global history." THE PUBLIC ESTABLISHMENT Army General Jean-Louis Georgelin, President of the public establishment dedicated to the conservation and restoration of Notre-Dame de Paris Cathedral, expressed his thanks to Autodesk for its help in the ongoing restoration. "I warmly thank Autodesk for supporting the rebirth of Paris Notre-Dame Cathedral. Using digital technologies designed for the supervision and management of the restoration site is essential for the public institution. Thanks to Autodesk's patronage, the use of cutting-edge design and construction technologies and BIM, are being leveraged to help prepare for the reopening of the Cathedral, and to once again welcome both pilgrims and visitors." Nicolas Mangon commented further. "We are humbled to participate in the restoration and future preservation of the Notre-Dame Cathedral, a truly magnificent architectural wonder of the world. Since the devasting fire two years ago, we have provided funding and technology to support the effort through the French Fondation du Patrimoine (Heritage Foundation) and this announcement reinforces our commitment," Support has come from all sections of France, with fundraising being organised by 'Friends of Notre-Dame de Paris' and foresters throughout the country donating over 1000 oak trees for the spire - all of which have already been felled and are drying out prior to use in its reconstruction. "It is a source of pride for the foresters of the National Forestry Office to participate in the rebirth of Notre- Dame de Paris," said Forestry Office Director Bertrand Munch, reflecting the passion and affection that the French have for their most famous building. The announcement also reflects Autodesk's interest in helping to restore Notre-Dame's prominence in the Paris skyline, which will be echoed by millions of people worldwide who cherish the site and will be delighted to see it in its full glory once again. www.autodesk.com May/June 2021 31
Page 1 and 2: CAD User MAY/JUNE 2021 VOL 34 NO 03
Page 3 and 4: CONTENTS MAY/JUNE 2021 CONTENTS Cre
Page 5 and 6: WHEN IT’S SIMPLE TO DO EVERYTHING
Page 8 and 9: INDUSTRY news AN ELEVATED VIEW OF T
Page 10 and 11: CASEstudy Tekla Structural Designer
Page 12 and 13: TECHNOLOGY focus Transport for the
Page 14 and 15: SOFTWARE focus Cost plus and other
Page 16 and 17: CASEstudy HS2 Risk Registers 3D Rep
Page 18 and 19: CASEstudy The Invisible Castle Henr
Page 20 and 21: CASEstudy Lighting up the industry
Page 22 and 23: SOFTWAREreview Scrap paper - litera
Page 24 and 25: CASE study Aiming for the stars Arc
Page 26 and 27: TECHNOLOGYfocus CFD for urban desig
Page 28 and 29: TECHNOLOGY focus Worksafe analytics
Page 32 and 33: YOUR GUIDE TO 5 7 2 4 1 3 21 22 23
Page 34 and 35: INDUSTRY comment A connected indust

CU2105

Create successful ePaper yourself

Delete template?

Save as template?