The Stability Study of an Innovative Steel Dome (original) (raw)
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International Journal of Space Structures, 1996
Proposals for forming various types of bar space structures. which could be used as building structures of different functional purposes are the subjects of this paper. The systems proposed have been developed with the aim of applying them in the design of structural systems for large span covers and highrise buildings. The essential aims of forming large span cover structures is to obtain systems which would allow building these covers using relatively short bars. In the paper some new configuations of such space structures are presented. The most important factor in the design of the structural system of a tall building is the need to provide a comparatively slender structure with appropriate great rigidity. Some proposals of application of space structures as structures of highrise buildings are presented in the paper.
Numerical Models of Chosen Types of Dome Structures
2004
The paper presents basic description of shaping processes of tension-strut structures developed by the author and proposed as lightweight structural systems for large span dome covers. In the paper are presented two basic types of the systems, which are built mainly by means of tetrahedral and octahedral modules with the V-shaped bar sets. For all the offered types of structures there are prepared suitable numerical models defined in the programming language Formian. Application of these numerical models considerably accelerates design process of these complex forms of spatial structures and makes possible an easier co-operation between all designers involved in this process.
Structural Systems Composed of Concentric Hoops and Designed for Lightweight Domes of Large Spans
Journal of Civil Engineering and Architecture, 2014
The paper presents a selected group of tension-strut structural systems designed for the construction of lightweight dome covers of large spans, which can be comparatively easy to assembly and have rises of which can be relatively small. This will allow significant decrease costs of erection and maintenance of objects covered by these roof structures. The proposed systems have been obtained from the results of suitable transformations of a chosen type of double-layer space frame and an appropriate arrangement of tetrahedron modules in the space of each of the newly designed type of the structural system. All these systems are built by means of concentric hoops having their own integral spatial stiffness obtained after an appropriate pre-stressing. Particular hoops can be mounted on the ground level and then one by one will be hoisted to the designed positions where they will be connected by means of special sets of the tension members. Due to these structural features, the assembly process of each system should be relatively simple, fast and not expensive. The whole tension-strut structure has to be connected to the compression perimeter ring and suitably pre-stressed. There are presented visualizations of the proposed systems prepared on the basis of the appropriate numerical models especially defined for each particular structure.
24 Space Frame Structures 24.1 Introduction to Space Frame Structures
A growing interest in space frame structures has been witnessed worldwide over the last half-century. The search for new structural forms to accommodate large unobstructed areas has always been the main objective of architects and engineers. With the advent of new building techniques and construction materials, space frames frequently provide the right answer and satisfy the requirements for lightness, economy, and speedy construction. Significant progress has been made in the process of development of space frame. A large amount of theoretical and experimental research programs were carried out by many universities and research institutions in various countries. As a result, a great deal of useful information has been disseminated, and fruitful results have been put into practice.
On the Flexibility of Deployable Dome Structures and their Application in Architecture
In this paper we discuss flexibility and applicability of deployable dome structures in contemporary architecture. A deployable dome is a spatial structure derived from appropriately connected planar polygonal panels. Nowadays, deployable domes are little researched comparing to other deployable structures, such as pseudo-cylinders, for example. When designing these configurations, either changeable supports' spans or strain of some structural elements might occur, depending on the underlying geometrical analysis. Such occurrences, usually being undesirable, can be avoided by the adequate geometrical solution which can also satisfy various sizes of the structures. Therefore, they could answer the purpose both in architectural and urban design. Thus, choosing suitable dimension of the structure, numerous applications can be obtained, starting from street furniture to large scale convertible structures for covering open spaces.
Structural Analysis and Design to Prevent Disproportionate Collapse
2016
Chapter 3 Progressive Collapse Design and Analysis of Space Structures 3.1 Introduction In this chapter, different forms of space structures are introduced, followed by a discussion of collapse accidents around the world and the collapse mechanism of different types of space structures. At the end of this chapter, a progressive collapse analysis example for a double-layer grid space structure is demonstrated using the programs Abaqus ® and SAP2000 (CSI, 2013). 3.2 Major Types of Space Structures Space structures have been widely used in different types of structures, from long-span to mid-span frames and also short enclosures, closed roofs, floors, exterior walls, and canopies. There are several major types of space structures used in current construction projects, such as double-layer grids, latticed shells, membrane structures, and tensegrity structures. 3.2.1 Double-Layer Grids Double-layer grids are one of the most popular structures used in current construction practice. They consist of top and bottom square grids with nodal joints connected by diagonal struts. Different configurations of the top and bottom layers can make different grid types. This type of construction resembles a pyramid shape. The steel bars are linked together by the joints to form a uniform roof structure. 3.2.2 Latticed Shells Latticed shells can be built by either a single-layer or a double-layer grid. For a long-span single-layer grid, the connections are normally K24849.indb 51 1/25/16 11:27 AM
Review on Comparative Study on Behaviour of Various Dome Structures for Different Parameters
IRJET, 2022
A dome is a distinctive structural arrangement that gains strength and stiffness based on its shape and form. Traditionally, stone masonry domes were constructed and are now mostly made of RCC Steel because of its re-usability. Traditionally, a dome is a hollow upper half of a sphere, made of various materials, with a history dating from prehistory. It encompasses the maximum volume with the smallest sized volumes without interruption by columns. The main goal of architects and engineers has always been to solve the problem of space enclosure. Architects and engineers look for new structural forms to accommodate large unobstructed areas. As a result, space structures, in which the three-dimensional function is realized, are of considerable importance. These structures are increasingly used in construction. They entail essentially analysis and design in three dimensions, as opposed to two dimensions.
Frontiers in Built Environment, 2020
Whereas reticulated domes (i.e., domes composed of bars) are very material-efficient in general, the geodesic dome is claimed to be superior according to its patent holder, Richard Buckminster Fuller. Recent studies on the optimal design of reticulated domes do not allow a direct comparison between the geodesic dome and other dome types because the test cases are not subjected to the same loads. This paper aims to determine which type of reticulated dome is superior in terms of material efficiency by comparing the minimized weight of different dome types, taking into account stress and buckling constraints. The study includes hemispherical Schwedler, Kiewitt, and geodesic domes with a diameter of 16 m, and a gravity load of 2 kNm −2. Full enumeration is used to optimize the discrete variables (number of rings, subdivisions along each ring, …), while a gradient-based algorithm is used for the continuous variables (member sections). The results show that the claim of uniform stressing in a geodesic dome is legitimate: if all members are assigned the same size, a geodesic dome is generally more evenly stressed and up to 28% lighter than other dome types of similar size. However, if all members are sized individually, the Schwedler dome is the lightest.