TY - CHAP A1 - Wolkowicz, Christian A1 - Ruth, Jürgen A1 - Stahr, Alexander ED - Gürlebeck, Klaus ED - Könke, Carsten T1 - TOOL TO CHECK TOPOLOGY AND GEOMETRY FOR SPATIAL STRUCTURES ON BASIS OF THE EXTENDED MAXWELL'S RULE N2 - One of the simplest principle in the design of light-weight structures is to avoid bending. This can be achieved by dissolving girders into members acting purely in axial tension or compression. The employment of cables for the tensioned members leads to even lighter structures which are called cable-strut structures. They constitute a subclass of spatial structures. To give fast information about the general feasibility of an architectural concept employing cable-strut structures is a challenging task due to their sophisticated mechanical behavior. In this regard it is essential to control if the structure is stable and if pre-stress can be applied. This paper presents a tool using the spreadsheet software Microsoft (MS) Excel which can give such information. Therefore it is not necessary to purchase special software and the according time consuming training is much lower. The tool was developed on basis of the extended Maxwell's rule, which besides topology also considers the geometry of the structure. For this the rank of the node equilibrium matrix is crucial. Significance and determination of the rank and the implementation of the corresponding algorithms in MS Excel are described in the following. The presented tool is able to support the structural designer in an early stage of the project in finding a feasible architectural concept for cable-strut structures. As examples for the application of the software tool two special cable-strut structures, so called tensegrity structures, were examined for their mechanical behavior. KW - Architektur KW - CAD KW - Computerunterstütztes Verfahren Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170327-30370 UR - http://euklid.bauing.uni-weimar.de/ikm2006/index.php_lang=de&what=papers.html ER - TY - CHAP A1 - Stahr, Alexander A1 - Ruth, Jürgen A1 - Wolkowicz, Christian ED - Gürlebeck, Klaus ED - Könke, Carsten T1 - ... WITHOUT RIGHT ANGLE. N2 - Currently sculptural design is one of the most discussed themes in architecture. Due to their light weight, easy transportation and assembly, as well as an almost unlimited structural variety, parameterised spatial structures are excellently suited for constructive realisation of free formed claddings. They subdivide the continuous surface into a structure of small sized nodes, straight members and plane glass panels. Thus they provide an opportunity to realise arbitrary double-curved claddings with a high degree of transparency, using industrial semi-finished products (steel sections, flat glass). Digital design strategies and a huge number of similar looking but in detail unique structural members demand a continuous digital project handling. Within a research project, named MYLOMESH, a free-formed spatial structure was designed, constructed, fabricated and assembled. All required steps were carried out based on digital data. Different digital connections (scripts) between varying software tools, which are usually not used in the planning process of buildings, were created. They allow a completely digital workflow. The project, its design, meshing, constructive detailing and the above-mentioned scripts are described in this paper. KW - Architektur KW - CAD KW - Arthur Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170327-30248 UR - http://euklid.bauing.uni-weimar.de/ikm2006/index.php_lang=de&what=papers.html ER - TY - THES A1 - Genzel, Elke T1 - Zur Geschichte der Konstruktion und der Bemessung von Tragwerken aus faserverstärkten Kunststoffen 1950-1980 T1 - To the history of construction and calculation of load bearing structures from fiber reeinforced plastics in buildings 1950-1980 N2 - Die Arbeit befasst sich mit der Anwendung faserverstärkter Kunststoffe für Tragwerke des Hochbaus. Es wird ein geschichtlicher Überblick über die Jahre 1950 bis 1980 gegeben und dabei herausgestellt, wie es 1. zur Einführung des bis 1950 unbekannten Werkstoffes im Bauwesen kommen konnte 2. welche Personen und Institute maßgeblich an der Einführung und Entwicklung des Bauens mit FVK beteiligt waren 3. welche Tragwerke verwendet wurden 4. wie die Pioniere diese Tragwerke bemaßen 5. welche konstruktiven Besonderheiten sich mit der Verwendung von FVK in der Tragstruktur ergaben Nach einer Einführung werden im Kapitel 2 die wichtigsten Faktoren der Entwicklung von Tragwerken aus GFK erörtert. Im Kapitel 3 wird die Technik der Fertigung von GFK-Teilen und deren Fügung beschrieben. Im Kapitel 4 werden die Tragwerke beschrieben und einzelne Tragwerkstypen eingehend erörtert. Im Kapitel 5 werden die Bemessungskonzepte und deren Entwicklung erörtert. In der Bilanz werden die Faktoren aufgezählt, die zum Abklingen des Bauens mit FVK in der Tragstruktur geführt haben. Die Arbeit wird ergänzt durch eine ca. 40-seitige Tabelle in der die gebauten Tragwerke in Abhängigkeit von den technischen Parametern Spannweiten und Lasten dargestellt werden. Im Anhang werden 10 exemplarische Bauten detailliert erörtert. N2 - The work is concerned with the application of fiber-reinforced plastics for buildings. The text give an historical overview over the years 1950 to 1980 and put out how it could come 1. how could FRP been discovered in the building market 2. which persons and institutes were considerably in the introduction and development of building with FRP involved 3. which construction they used 4. how the pioneers calculate the buildings 5. which constructional characteristics developed. After an introduction become in chapter 2 are the most important factors of the development of bearing structure from GRP discussed. In chapter 3 the technology of the manufacturing of GRP parts and their connecting is described. In chapter 4 the bearing structures are described and individual wing unit types are discussed in detail. In chapter 5 the calculation concepts and their development are discussed. In the balance the factors are enumerated, which were responsible for the end of building with FVK in the structure. The work supplemental by one approx. 40- lateral table in that the built wing units as a function of the technical parameters spans and loads to be represented. In the appendix 10 exemplary buildings are discussed in detail. KW - Tragwerk KW - Kunststofftechnik KW - Kunststoff-Metall-Verbund KW - Kunststoff KW - Kunststoffbauteil KW - Kunststoffherstellung KW - Kunststoffindustrie KW - Tragkonstruktion KW - Tragwerke KW - FVK KW - Kunststoffbauten KW - Kunststoffhäuser KW - load bearing structure KW - structures KW - fiber reeinforced plastics KW - plastic building Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20070226-8468 ER -