Investigation of progressive collapse of double-layer tensegrity grids composed of triangular simplexes

Farhoudy, Fardin (2017) Investigation of progressive collapse of double-layer tensegrity grids composed of triangular simplexes. Masters thesis, university of Mohaghegh Ardabili.

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Abstract

Tensegrity systems that are a kind of space structures are interesting issues for structural engineers due to some advantages such as light weight, folding and beauty. This kind of structures are included many members and connections, that cause to be considered the effect of possible failure of each members for the reasons such as material weakness, impact, explosion and etc. In this study the effects of sudden failure of critical members and connections on the structural behavior contain redistribution of forces, risk of progressive collapse and sudden increase of deflection will be discussed. In this study two kind of tensegrity structures with triangular simplexes by continuous and discontinuous compression members will discussed. After model validation with an experimental study, the main model in FEM software ABAQUS imported and then the effects of sudden failure of members and connections were investigated by nonlinear dynamic analysis. checking node removal and leaded Members to the node, that is highlighted part of iran’s space structures code, were studied for the first time. results show that studied tensegrity system has satisfying respons against progressive collapse wich sudden failure of members and connections did not caused damage in adjacent members and did not dead to progressive colaps even in one and half times more than service load.

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