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Form-finding is an essential task in the design of efficient lightweight structures. It is based on the crucial assumption of one single shape-determining load case, usually represented by self-weight. Adaptive components integrated into the structure open a way to even more efficient lightweight designs, as such structures can adapt their shapes to varying external loads and redistribute internal forces. This article presents a method for form-finding of adaptive truss structures subject to multiple, independently acting load cases, also incorporating possible design constraints. To ensure the consistency of the manufacturing lengths of passive elements in all load cases, special constraints are considered. The method enables to reduce sensitivity of the structural shape with respect to various different loads by means of actuation to meet design and serviceability requirements with a lower structural mass compared to conventional design strategies. This is demonstrated within a replaced real-world-like setting of an adaptive suspension truss bridge.
Cities need to adapt to climate change in an increasingly rapid pace. Data and information on the existing and expected climate impact and the effectiveness of adaptive measures can support the planning and implementation of resilient urban planning. To inform urban climate change adaptation (CCA) in Germany a diverse landscape of climate services exists. However, the literature on usability gaps shows different barriers impeding the use potential of climate services. This study empirically analyzes the needs and barriers of municipal staff of different departments in Constance with regard to utilizing climate data and information. Surveying 72 and interviewing 10 municipal staffers, we found that climate data and information hold great potential for different public services but its handling poses many challenges. Furthermore, we found that a strategic approach mainstreaming climate data and information into cross-departmental work practices on urban CCA is crucial to anchor its usage in complex decision-making systems. The co-development of data-sensitive workflows, decision support tools, and capacity trainings can foster such integration. Based on the survey and interview results we designed a workflow on how to integrate such data and information strategically in municipal work processes.
Agrivoltaics is an emerging technology and combines the agricultural and energy generation sectors by enabling dual land use. The use of photovoltaic modules on agricultural land, for example in overhead or interspace systems, which are the focus of this work, can create synergy effects from which both sectors can benefit.
The aim of this study is to analyse the potential of agrivoltaics in the Seychelles. The focus of the potential analysis is on an acceptance study in which the perception of 75 farmers towards agrivoltaics and their willingness to implement the new technology is analysed. The data collection was carried out with the help of personal surveys.
The results of the studies show that agrivoltaics have potential in the Seychelles. Potential was identified in the use of irrigation systems and the self-supply of electricity, among other things. The results of the study also show that there is a need for further research on agrivoltaics in the Seychelles, for example in the area of field studies/test set ups and financing concepts.
Der Bericht beschreibt den Lebenszyklus des Flachglases. Des Weiteren wird aufgezeigt, welche Maßnahmen nötig sind, um die Menge an Flachglasscherben einem hochwertigen Recycling zuzuführen. Kern des Berichtes sind die Auswertung von Experteninterviews. Daran nahmen Expertinnen und Experten der Entsorgungswirtschaft, der Glasindustrie und des glasverarbeitenden Gewerbes teil. Die mangelhafte Getrennthaltung der Flachglasscherben auf Baustellen von Rückbau- und Abrissprojekten führt zu unerwünschten Verunreinigungen der Scherben durch Erde und Steine. Daher besteht sowohl für die Steigerung der Quantität als auch der Qualität der Scherben noch einiges Potenzial. Als Ergebnis werden mehrere Maßnahmen genannt um dieses Ziel zu erreichen. Neben dem Recycling wurde auch die Wiederverwendung und die Vorbereitung zur Wiederverwendung von ausgebauten Fenstern diskutiert.
Traggerüste
(2024)
Spannbeton
(2024)
Spannbeton ist aus dem heutigen Baugeschehen nicht mehr wegzudenken. Im Brückenbau ist er gängige Praxis, im Hoch- und Industriebau (und hierbei insbesondere in Betonfertigteilen) wird er gleichfalls angewendet, um schlanke, weitgespannte Konstruktionen zu ermöglichen. Die vorliegende Neuauflage berücksichtigt die Deutsche Fassung der DIN EN 1992 – EC 2 – sowie den zugehörigen Deutschen Nationalen Anhang NA – EC 2/NA.
Die Theorie des Spannbetonbaus wird in komprimierter Form anschaulich und verständlich erläutert. Im Anschluss wird die Bemessung und Konstruktion vorgespannter Bauteile anhand von ausführlichen Anwendungsbeispielen praxisnah dargestellt.
