scholarly journals Form Finding and Structural Optimisation of Tensile Cable Dome Using Parametric Modelling Tools

2020 ◽  
pp. 1-10
Author(s):  
Iria Heitel ◽  
Feng Fu
Keyword(s):  
Parametric Modelling ◽  
Structural Optimisation ◽  
Form Finding ◽  
Cable Dome

Form-finding analysis for a new type of cable–strut tensile structures generated by semi-regular tensegrity

2016 ◽  
Vol 20 (5) ◽  
pp. 772-783 ◽  
Author(s):  
JinYu Lu ◽  
Xiao Dong ◽  
XiLei Zhao ◽  
XiaoLong Wu ◽  
GanPing Shu
Keyword(s):  
Design Method ◽  
Geometric Transformation ◽  
Structural System ◽  
Form Finding ◽  
Practical Applications ◽  
New Type ◽  
Equilibrium Matrix ◽  
Cable Dome ◽  
Value Decomposition ◽  
Form Finding Analysis

A tensegrity structure is a type of self-balancing tensile structure, which consists of tension cables surrounding compression struts. Based on the geometry and topology of the classic half-octahedron tensegrity, this article presents a form-finding analysis of semi-regular tensegrity units using singular value decomposition of the equilibrium matrix. We propose the design formulas for the unit geometric transformation, obtain its internal self-stress modes and inextensional mechanism modes, and verify its geometric stability. Then, we devise a design method and compute the overall feasible self-stress of a tensegrity torus. A novel cable–strut tensile structural system is generated through combining a tensegrity torus and a Levy-type cable dome. Finally, a physical model is constructed to verify the feasibility of this structural system. This work enriches existing forms of tensegrity structures and contributes to further practical applications of tensegrity systems.

Form-finding and analysis of an alternative tensegrity dome configuration

2017 ◽  
Vol 20 (11) ◽  
pp. 1644-1657 ◽  
Author(s):  
Fatih Uzun
Keyword(s):  
Potential Energy ◽  
Energy Minimization ◽  
Minimum Potential Energy ◽  
Form Finding ◽  
Tensegrity Structures ◽  
Minimum Potential ◽  
Local Impact ◽  
Cable Dome ◽  
Minimization Approach ◽  
Cable Domes

Geiger domes are composed of cable and strut elements. This property of cable domes is the same as tensegrity structures, but in contraction to tensegrity structures, strut elements do not have a function that balances tension in cable elements with compression. In this study, a new cable dome configuration, that mimics the form of tensegrities, is proposed which is able to spread effect of an applied load into all elements of the dome and reduces its local impact. Form-finding and analysis of the Geiger and new dome configurations are performed based on the principle of minimum potential energy. Self-equilibrium forms with minimum potential energy are determined using genetic algorithms. The ability of genetic algorithm based potential energy minimization approach to perform form-finding of loaded or load free cable domes is investigated. Performance of the proposed configuration is tested and compared with the Geiger configuration under various loading conditions.

Investigation into pre-stress modes and optimal layout of a new hybrid cable-strut system

2019 ◽  
Vol 23 (7) ◽  
pp. 1259-1275
Author(s):  
Rasoul Asghari ◽  
Karim Abedi ◽  
Mohammad Reza Chenaghlou
Keyword(s):  
Hybrid Structure ◽  
Combination Method ◽  
Hybrid Structures ◽  
Structural Behavior ◽  
Force Distribution ◽  
Fundamental Issue ◽  
Optimal Layout ◽  
Free Standing ◽  
Form Finding ◽  
Cable Dome

Cable domes obtain their stability through the boundary compression ring that contradicts the free-standing principle of tensegrities. Replacement of that with a tensegrity ring has recently attracted the attention of researchers. In this study, form-finding of a modified hybrid structure consisting of a tensegrity ring and a Levy cable dome has been presented. Two groups of different configurations with two different arrangements of modules in tensegrity ring and also two connecting methods between the ring and cable dome parts were considered in the hybrid structures. Since the distribution of pre-stress forces is a fundamental issue in structural behavior, the proximity of pre-stress force values between two parts of ring and cable dome was chosen as comparison criterion. The form-finding of a variety of hybrid cases was carried out and results were compared with the previously proposed hybrid structure and with each other to achieve the best combination method between two parts. It was found that the hybrid cases proposed in this study have a very better pre-stress force distribution and finally the best hybrid structure also was presented.

scholarly journals An overview of the natural force density method and its implementation on an efficient parametric computational framework

2021 ◽  
Vol 8 (1) ◽  
pp. 47-60
Author(s):  
Márcio S. V. de Souza ◽  
Ruy M. O. Pauletti
Keyword(s):  
Visual Programming ◽  
Superior Performance ◽  
Force Density ◽  
Parametric Modelling ◽  
Form Finding ◽  
Linear Solution ◽  
Analysis And Design ◽  
Density Method ◽  
Force Density Method ◽  
Computer Aided

Abstract The new paradigms of parametric modelling have been proving promising on the advance of systems for analysis and design of taut (or tensile) structures. With this premise, the presented work consist on the development with a form-finding tool for Computer Aided Design(CAE) and Computer Aided Engineering (CAE) integration using VPL (Visual Programming Language), in the context of parametric modelling. The methods used in the implementation are the Force Density Method (FDM) and the Natural Force Density Method (NFDM), taking advantage of the linear solution approach provided, suitable for fast form-finding computational procedures. The program is implemented as a Grasshopper plug-in and it is named BATS (Basic Analysis of Taut Structures), which enables parametric definition of boundary conditions for the form-finding. The program structure and benchmarks with other available Grasshopper plug-ins for taut structures form-finding are presented, showing considerably superior performance using BATS.

Geometry-based construction technique and application of Geiger type cable dome

2012 ◽  
Vol 29 (3) ◽  
pp. 195-200
Author(s):  
Cheng ZHANG ◽  
Hui WU ◽  
Bo-qing GAO ◽  
Chang-hong WANG
Keyword(s):  
Construction Technique ◽  
Cable Dome

scholarly journals Floating-bending tensile-integrity structures

2021 ◽  
Vol 8 (1) ◽  
pp. 89-95
Author(s):  
Micol Palmieri ◽  
Ilaria Giannetti ◽  
Andrea Micheletti
Keyword(s):  
Structural Design ◽  
Membrane Systems ◽  
Limit States ◽  
Form Finding ◽  
Supported Membrane ◽  
Tensegrity Systems ◽  
Matlab Implementation ◽  
Diamond Type ◽  
Conceptual Work

Abstract This is a conceptual work about the form-finding of a hybrid tensegrity structure. The structure was obtained from the combination of arch-supported membrane systems and diamond-type tensegrity systems. By combining these two types of structures, the resulting system features the “tensile-integrity” property of cables and membrane together with what we call “floating-bending” of the arches, a term which is intended to recall the words “floating-compression” introduced by Kenneth Snelson, the father of tensegrities. Two approaches in the form-finding calculations were followed, the Matlab implementation of a simple model comprising standard constant-stress membrane/cable elements together with the so-called stick-and-spring elements for the arches, and the analysis with the commercial software WinTess, used in conjunction with Rhino and Grasshopper. The case study of a T3 floating-bending tensile-integrity structure was explored, a structure that features a much larger enclosed volume in comparison to conventional tensegrity prisms. The structural design of an outdoor pavilion of 6 m in height was carried out considering ultimate and service limit states. This study shows that floating-bending structures are feasible, opening the way to the introduction of suitable analysis and optimization procedures for this type of structures.

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