Overview
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ABSTRACT
Complement to the strengthening of structures treated in the first part of this paper, this second part shows an extensive practice in which actors of the construction industry are chaining, enlarging, enhancing or re-qualifying existing structures to give them a new life. Vertical and horizontal extensions of buildings, structures installed within existing walls but also coverings of residual spaces with glazed roofs are comprehensively developed here.
The author also gives information on buildings upgrades to achieve a better resistance to fire or earthquakes... He finally, deals in detail with the rehabilitation/insulation of facades and roofs with systems using coated steels, stainless steels and weathering steel.
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Read the articleAUTHOR
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Pierre ENGEL: Engineer, Master of Sciences, Doctor in Philosophy - Professor at the Écoles Nationales Supérieures d'Architecture
INTRODUCTION
The topics covered in this second part of the article on steel rehabilitation concern global interventions on a building scale. . This work includes building extensions, both horizontal and vertical, as well as large-scale construction inside existing buildings or behind façades that have been preserved for historical reasons. The covering of residual areas such as patios or courtyards is also a chapter in its own right.
All these issues are particularly important in today's context of urban densification, which now prevails in all urban analyses for obvious reasons of sustainable development, but also to compensate for the scarcity of building plots. This redefinition of structural forms is often accompanied by changes of use and changes in building class due to typological changes and/or changes in regulatory category for fire, earthquake, climatic and/or operating loads. It is also an opportunity to adapt to new standards or to repair existing structures, such as the corrosion pathologies that appear when existing structures are exposed.
The redefinition and/or repair of building envelopes is often a consequence of these major modifications to existing buildings, just as it is today an integral part of urban renewal. Façade repair solutions, to achieve insulated constructions in line with new thermal regulations but meeting the aesthetic criteria dictated by architects, are now unavoidable. Steel offers a wide variety of solutions that can be applied to all types of structure (masonry, iron and cast iron, reinforced concrete and timber frame). Its advantages range from its strength to the wide range of possible modenations and colors. .
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KEYWORDS
metallic construction | building on | building along | building upgrade | steel | modelling 3D
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Pathologies and building rehabilitation
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Rehabilitating with steel
Bibliography
Websites
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Arcelor-Mittal site
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Constructalia, the steel for construction portal developed by Arcelor
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Standards and norms
- Actions on structures – Part 1-1: General actions – Density, deadweight and operating loads for buildings. - Eurocode 1 ENV 1992-1-1 - Mars 2003
- Structural steel design – Part 1-1: General rules and rules for buildings. - Eurocode 3 ENV 1993-1-1 - Octobre 2005
- Calcul du comportement au feu. - Eurocode 3 ENV 1993-1-2 - novembre 2005 et Dan octobre 2007
- Design of steel structures. Part 1-3: General...
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