Anna Kühlen
Karlsruhe Institute of Technology
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Construction Management and Economics | 2011
Michael Hiete; Anna Kühlen; Frank Schultmann
Various building rating systems have been developed to assess the ‘green’ or sustainable performance of buildings. Most systems make use of hierarchical criteria systems to evaluate the buildings with respect to the different aspects of sustainability. Often, these criteria show complex interdependencies between each other. Taking the German building rating system as an example, the Decision‐Making Trial and Evaluation Laboratory (DEMATEL) method is used to analyse such interdependencies and to characterize the criteria. Users of the rating system might benefit from this information, e.g. when focusing on cause criteria counting on that an improvement there will also result in improvements of dependent criteria. Rating system developers might remove strongly related criteria and correct the criteria weighting for identified interdependencies.
Built Environment Project and Asset Management | 2017
Felix Hübner; Rebekka Volk; Anna Kühlen; Frank Schultmann
Purpose The purpose of this paper is to provide a comprehensive overview of literature and methods that can be used for deconstruction project planning of buildings. Furthermore, shortcomings of the identified planning methods are presented and research gaps are identified. Design/methodology/approach Requirements to consider for the planning of deconstruction projects are defined, to help in the classification of planning methods. With the help of these requirements, in a detailed literature review strategic and operational planning methods for deconstruction projects are investigated and discussed. Requirements which are not met by any of the identified planning methods can be interpreted as research and/or documentation gaps. Findings On the one hand, the literature review shows that recent approaches deal with planning methods for deterministic time and resource scheduling. Furthermore, project costs can be well planned by several methods. On the other hand, the literature review reveals that recent approaches mostly do not consider risks and uncertainties, environmental hazards or specific safety issues. A major shortcoming is that applied planning methods can only calculate up to a specific level of detail, e.g. with a limited number of activities, due to a very high computational effort in solving such project planning problems exactly. Originality/value To the authors’ knowledge, this is the first study that provides an overview of literature and methods for the deconstruction project planning of buildings and it is also the first study that unveils research gaps for future research. Furthermore, the classified planning methods assist in identifying suitable methods for the planning of future deconstruction projects.
Science & Engineering Faculty | 2013
Mei Li; Anna Kühlen; Jay Yang; Frank Schultmann
Construction and demolition (C&D) waste occupies the largest share of overall waste generation in many countries. However, waste management practices and outcomes may differ between countries. For instance, in Australia, C&D waste recovery is continuously improving during the last years but the amount of C&D waste increases every year, as there has been little improvement in waste avoidance and minimization. In contrast, in Germany, waste generation remains constant over many years despite the continuous economic growth. The waste recycling rate in Germany is one of the highest in the world. However, most waste recycled is from demolition work rather than from waste generated during new construction. In addition, specific laws need to be developed to further reduce landfill of non-recycled waste. Despite of the differences, C&D waste generation and recovery in both countries depend on the effectiveness of the statutory framework, which regulates their waste management practices. This is an issue in other parts of the world as well. Therefore countries can learn from each other to improve their current statutory framework for C&D waste management. By taking Germany and Australia as an example, possible measures to improve current practices of C&D waste management through better statutory tools are identified in this paper. After providing an overview of the statutory framework of both countries and their status in waste generation and recovery, a SWOT analysis is conducted to identify strengths, weaknesses, opportunities and threats of the statutory tools. Recommendations to improve the current statutory frameworks, in order to achieve less waste generation and more waste recovery in the construction industry are provided for the German and Australian government and they can also be transferred to other countries.
Archive | 2018
Anna Kühlen; Julian Stengel; Rebekka Volk; Frank Schultmann; Markus Reinhardt; Heinrich Schlick; Shervin Haghsheno; Angelika Mettke; Stefan Asmus; Stephanie Schmidt; Johannes Harzheim
Folgende drei Instrumente wurden entwickelt, mit deren Hilfe der Immissionsschutz zukunftig in die Planung und Durchfuhrung von Abbruch- und Ruckbauvorhaben integriert werden kann: eine Datenbank mit okonomischen, okologischen und technischen Kennwerten fur die Planung des Abbruch- und Ruckbauprozesses, ein auf die Datenbank zuruckgreifender Prototyp eines IT-gestutzten Planungsunterwerkzeuges, der an realen Ruckbau- und Abbruchprojekten getestet wurde, ein prototypisches Immissionserfassungssystem zur permanenten Immissionsuberwachung.
Archive | 2017
Anna Kühlen
Um Bauherren, Planungsingenieure, Ruckbauunternehmer und/oder Behorden bei der Identifikation und Definition eines adaquaten Ruckbauplans mit Techniken fur die einzelnen Vorgange fur ein bestimmtes Ruckbauprojekt zu unterstutzen, konnen sogenannte „multi-mode resource-constrained project scheduling problems“ (MRCPSP) fur die operative Ruckbauplanung eingesetzt werden. Alternative Ruckbautechniken der einzelnen Projektvorgange werden dabei als Modi abgebildet. Die Entscheidungsfindung erfolgt hinsichtlich quantitativer okonomischer Ziele, wie der Minimierung der direkten Kosten oder der Dauer des Gesamtprojekts. Projektbeschrankungen betreffs okonomischer Grosen, wie maximales Budget und maximale Dauer, und technischer Grosen, wie verfugbare Ressourcen, werden als erneuerbare und nicht-erneuerbare Ressourcen modelliert. Lokale Immissionen im Allgemein und deren Minderung im Speziellen sowie Charakteristika des Umfeldes/der Nachbarschaft und deren Veranderungen bleiben in diesen Modellen und bei der Entscheidungsfindung bislang allerdings unberucksichtigt. In der Dissertation wird ein Modell zur technischen, okonomischen und okologischen Ruckbauplanung und –entscheidungsunterstutzung (TEE-D-Plan) entwickelt und angewandt. Durch dieses modulare Modell fur die operative Ruckbauplanung werden zum ersten Mal lokale Immissionen in Form von Larm, Staub und Erschutterungen als Zielkriterien in die Entscheidungsfindung integriert. Die Bewertung der technischen Durchfuhrbarkeit von Ruckbautechniken wird um Parameter wie die Abbruchhohe, die am Ende auch die resultierenden Immissionen beeinflusst, erganzt. Die okonomische Bewertung einzelner Techniken wird auf Basis von Daten aus der Literatur und Expertenbefragungen aktualisiert und verbessert und durch zwei Testprojekte validiert. Mittels eines Ansatzes der Umweltwirkungsabschatzung und neu erhobenen Primardaten aus Experimenten und Expertenbefragungen konnen Larm-, Staub-, und Erschutterungsimmissionen von Ruckbauarbeiten in Form von prozentualen Auslastungen basierend auf der menschlichen Wahrnehmung erstmals quantitativ abgeschatzt werden. Mit Hilfe von TEE-D-Plan werden Projektplane mit Techniken fur einzelne Vorgange fur ein bestimmtes Ruckbauprojekt hinsichtlich der Praferenzen des Entscheiders zur Minderung von Immissionen und unter Berucksichtigung der Gesamtprojektdauer und -kosten vorgeschlagen.
Barriers for Deconstruction and Reuse/Recycling of Construction Materials. Ed.: S. Nakajima | 2014
Anna Kühlen; Neil Thompson; Frank Schultmann
5th International Conference on Engineering, Project, and Production Management (EPPM), Port Elizabeth, South Africa, 26-28.11.2014 | 2014
Anna Kühlen; Rebekka Volk; Julian Stengel; Frank Schultmann
World Sustainable Building Conference (SB'11), Helsinki, Finland, October 18-21, 2011 | 2011
Michael Hiete; Anna Kühlen; Frank Schultmann
International Conference on Construction and Real Estate Management (ICCREM'10), Brisbane, Australia, December 1-3, 2010 | 2010
M. Hiete; Anna Kühlen; Frank Schultmann
Proceedings of the CIB World Building Congress 2016: Volume V - Advancing Products and Services. Ed.: N. Achour | 2016
Anna Kühlen; Rebekka Volk; Frank Schultmann