Numerical Models of Chosen Types of Dome Structures (original) (raw)
Related papers
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.
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.
Study of Dome Structure Using Finite Element-Based Software E-Tab for Dynamic Loading
IRJET, 2022
In recent years, there is been an increasing number of structures using steel domes as it is one of the most efficient shapes in the world. It covers maximum volume with the minimum area with no interrupting columns in the middle an efficient shape would be more efficient and economic. Dome roofs are the lightest structure to cover circular shapes. In this research paper, the analysis of steel dome is examined using computer software E-tabs. This paper conducts a deep study of major features of structural analysis of E-tab software. E-tab software has the analysis of its own features option, output option, limitation, and advantages. Dome is one of the powerful architectural representations. This element resembles the hollow upper half of a sphere. In the age of civilizations, the form of the dome was stuck in the public's minds as an iconic sign of a sacred building, but in the present time architects have built domes to achieve new purposes using new building technologies. This paper, therefore, investigates these technologies and outlines the new role of domes following a scientific methodology. It is an element of architecture that resembles the hollow upper half of a sphere. The thickness of the dome is very small compared to its other dimensions-it varies from 75mm to 150mm. A dome is a self-supporting structural element that resembles the curved hollow upper half of a sphere. A dome can rest directly upon walls, columns, a drum, or a system of squinches or pendentives used to support the transition of shape from a square or rectangle to the round or polygonal base of the dome.
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.
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.
IRJET- Conceptual Design of Wide Span Spherical Dome
IRJET, 2021
In the recent years, there have been an increasing number of structures using concrete and steel domes as one of the most efficient shapes in the world. This paper concentrates on analyzing and designing of dome structure for larger spans which is more efficient and economical as it will not have the interrupted columns. The study of shell theory and their possible way of failure is also presented in this paper. The use of pre-stressed concrete sections is done as it is suitable for larger spans. The M-40 grade of concrete and Fe-415 HYSD bars is adopted. The result shows that the rise is inversely proportion to the stress. The validation of obtained results with manual results for different spans to central rise ratios is also carried out. The approach used to achieve this objective is by adopting working stress method and analyzing of concrete dome using computer software STAAD.Pro. As per the obtained results it can be concluded that the stresses are less in dome which is having central rise of 1/5th of the span. Rise of 1/4th of the span cannot be adopted as its angle should not be greater than 51 0 52', to keep the shell in compression zone.
Efficiency in Design and Stability Assessment of Rigid and Semi-Rigid Reticulated Dome Structures
Civil Engineering and Architecture, 2023
This research introduces an innovative methodology to accurately determine the compressive strength of reticulated dome members constructed from 6082-T6 aluminum alloys prone to buckling. Our approach employs a customized mathematical model represented as a Perry-type curve, specifically tailored to capture the unique behavior of these structural components. To validate the effectiveness and precision of our proposed technique, we conducted comprehensive geometric and material nonlinear analyses (GMNA) on two distinct configurations of single-layered reticulated domes. These domes were interconnected in both rigid and semi-rigid manners, with the incorporation of aluminum connection bending stiffness meticulously integrated into a rigorously validated computational framework. The resultant load data facilitated the precise calculation of column strength for the reticulated dome members. To provide context and benchmark our findings, we compared the strength coefficient derived from our methodology against stability coefficients obtained from established industry standards. These standards encompass the American specification for aluminum structures, Eurocode 9 for aluminum structure design in Europe, GB50017-2003 for steel structure design in China, and GB50429-2007 for aluminum structure design in China. Subsequently, we developed a dedicated column strength curve specific to these domes and conducted a thorough comparison with column curves outlined in various industry codes. Finally, we present a meticulous comparative analysis between the outcomes of our study and the results reported by Adeoti et al. [2] and Rasmussen and Rondal [1]. By introducing this novel column curve expression and providing extensive comparative insights, this research significantly advances our understanding of the stability and strength characteristics of 6082-T6 aluminum-alloy reticulated domes when subjected to compressive loads. This contribution enhances the design and assessment of such structures in engineering practice.
ANALYSIS AND DESIGN OF STEEL DOME USING SOFTWARE
In the recent years, there have been an increasing number of structures using steel domes as one of the most efficient shapes in the world. It covers the maximum volume with the minimum larger volumes with no interrupting columns in the middle with an efficient shapes would be more efficient and economic. Dome roofs are the lightest structure to cover circular shape. Dome can be used when the internal pressure is higher; do not have problems with mounting of an internal floating roof. Supplementary foundations are not necessary for dome roofs. In other words always when it is possible the dome roofs are recommended. In this research paper the analysis of steel dome is examined by the use of computer software STAAD.Pro. For the analysis different diameter of the steel tube member and height of steel.