Papers about space grid strucutures
3 new articles about space structures
1. Experimentally analyzed stability and ductility behaviour of a space-truss roof system
Attila Fülöp, Miklós Iványi
Thin-Walled Structures
Volume 42, Issue 2, February 2004, Pages 309-320
Cold Formed Structures: Recent research advances in Central and Eastern Europe
Abstract
A space-truss roof-system [1], was experimentally analysed to determinate the behaviour of this system until collapse. The main aim of the investigation to find what is the stability and ductility behaviour of this system under eccentric and concentric force and to investigate an adequate moment-rotation function to model the behaviour of the truss connections as semi-rigid joints in the numerical model.
A symmetrical space-truss section was examined. This system contains thin-walled hollow squared sections as truss bars, and every bar has uniform length. In every joint eight bars are connected by high-strength pre-stressed bolts. Inductive transducers measured the deflections of joints, and strain gauges measured the strains in the investigated bars. Four strain gauges were in the mainly tension members and eight strain gauges were in the mainly compression members, each end of the bars.
This paper deals with the detailed investigation of this roof system during the “elastic” range and the collapse.
2. Limit analysis of space grids
M. Grioorian
International Journal of Solids and Structures,
Volume 11, Issue 3, March 1975, Pages 295-304
Abstract
The paper presents generalized, unique solutions for the limit design of pin-connected, double-layer space grids of regular construction, simply-supported along the sides of a rectangle and carrying a uniform concentration of normal nodal loading applied to the upper layer of the structure. The principal assumption upon which the foregoing results are obtained is that member forces increase monotonically with the applied loads, therefore insuring against the inducement of higher than ultimate loads in the compressive elements at anytime prior to structure failure. The virtual work method of the plastic analysis has been employed in conjunction with the techniques of the finite difference calculus to study the various collapse modes of the system. The work is concluded with an illustrative example to demonstrate the simplicity of the proposed solutions.
3. Nonlinear analysis of lattice structures
S. Kitipornchai, F.G.A. Al-Bermani
Journal of Constructional Steel Research,
Volume 23, Issues 1-3, 1992, Pages 209-225
Abstract
The paper describes a nonlinear analytical technique developed by the authors in recent years for predicting the structural response of large scale lattice structures. This type of structure is generally more sensitive to imperfections; hence, the analysis method needs to consider the various nonlinear effects. Sources of nonlinearity affecting the ultimate behaviour of lattice structures include geometric nonlinearity, material nonlinearity, joint flexibility and slippage. Geometric nonlinearity can be accounted for by incorporating the effect of initial stress as well as geometrical variations in the structure during the loading process. For large scale lattice structures, the material nonlinearity can be incorporated by using the lumped plasticity model, while the effect of joint flexibility can be incorporated by modifying the tangent stiffness of the element using an appropriate moment—rotation relation for the joint. The nonlinear formulation has been applied to a number of example problems selected to demonstrate the applicability and versatility of the method.
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
http://forum.civilea.com/thread-27464.html
***************************************