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Abstract:	Bauen im Bestand beschreibt im Allgemeinen die Verdichtung, Modernisierung und Sanierung von bestehenden Gebäuden. Unter dem Aspekt der Nachhaltigkeit liegt der Schwerpunkt des Bauens der nächsten Jahrzehnte im Bestand. Hierbei ergeben sich große Chancen für den Stahl(leicht)bau, die im Rahmen der vorgestellten Forschungsergebnisse aufgezeigt werden. Die interdisziplinäre Planung von Gebäudeerweiterungen in Form von Aufstockungen aus Stahl erfolgt für ausgewählte, repräsentative Referenzgebäude und liefert eine Basis für weitere, allgemeine Erkenntnisse zum Bauen im Bestand unter Berücksichtigung von stadtplanerischen und architektonischen sowie bauphysikalischen Aspekten, statisch-konstruktiven Anforderungen, des Baubetriebs, der Immobilienbewertung und lebenszyklusübergreifenden Nachhaltigkeitsbewertungen. Im Ergebnis liegen erstmalig detaillierte Ökobilanzergebnisse für spezifische Bestandsbaumaßnahmen vor, die eine Vorteilhaftigkeit gegenüber Abriss und Neubau ausweisen. Integral analysis of building projects dealing with existing structures including comparative assessments of sustainability - Exemplified through investigations of the building for the physics institute at the TU Dortmund, Germany. Building in existing contexts and structures considers urban densification, modernization and redevelopment of the existing building stock in general. Aspects of sustainability will primarily be focusing on refurbishment and restoration of existing buildings; they will be the challenge of future. These future developments unfold many opportunities for the application for steel and steel-lightweight structures, which are highlighted through this presented research project. The interdisciplinary planning approach of roof top extensions for existing buildings with steel structures is simulated for selected, representative reference buildings and can be used to facilitate a basis for further insights in respect to building with existing structures. This approach considers city planning and architectural requirements, aspects of building physics, structural solutions, building process concerns, real estate assessment, sustainability and life cycle assessments. As a result, for the first time detailed outcomes regarding the life cycle assessments for specific projects dealing with the composition of existing structures in contrast to the process of demolition and new development are available. An advantage of building in existing context can be determined.
Source:	Stahlbau 83 (2014), No. 7
Page/s:	441-451
Language of Publication:	German

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