الفهرس 
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Abstract
Attention to the effect of temperature change on the behavior of space steel structures has been paid. A method for converting the temperature effects to equivalent factious joint 19ads has been presented. A geometrical nonlinear incrementally iterative technique, including the effects of axial forces and bowing of space .structure members, is used for the analysis and the study of the stability of space structures. An algorithm based on the current stiffness parameter is used to predict the ultimate- load of space structures. For this purpose, the tangent stiffness matrix has been used in the analysis, which is carried out by the displacement method through an incremental\ iterative procedure based on Newton-Raphson technique. The iterations that take into account the. latest geometry are repeated until the unbalanced loads become .negligible .and equilibrium is obtained. The equilibrium equations are solved by Cholesky’s method. Results of illustrative examples and conclusion based on these results are also given.