الفهرس 
: NONLINEAR ANALYSIS OF THREE DIMENSIONAL STRUCTURAL BY DIMENSIONAL STRUCTURAL BYDIMENSIONAL STRUCTURAL BYOnly 14 pages are availabe for public view
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Abstract
This thesis deals with the optimum design of three-dimensional
tension structures. The thesis introduces an extensive survey of
published work on general concepts, historical and structural types of
tension structures. A proposed algorithm that is practically applicable to
the optimum design problems of large tension, latticed, and guyed cable
structures has been introduced.
The analysis is based on unconstrained minimization of total
potential energy of the structure by the conjugate gradient technique.
The optimum design is achieved to satisfy the constraints of the design
variables using the optimality criteria method. A recurrence relation with
relaxation factors for updating the design variables is implemented to
obtain faster and more rates of convergence to the optimum design. To
show the efficiency of the design algorithm, the proposed algorithm is
checked by analysing different solved examples. In addition, a simple
and efficient procedure for the analysis and design of guyed towers is
proposed. Equivalent beam-column properties are derived for a variety
of mast truss panels. The effect of different parameters on the optimum
design of different types of guyed towers as three-dimensional
structures, considering variable loading conditions, are studied. Further,
the stability of guyed towers is investigated in order to determine the
factor of safety against buckling through a non-dimensional shear
stiffness factor. The results of this study are discussed and summarized.
Key words: Tension Structures, Optimum Design, Guyed Mast,
Latticed, Truss Panels, Stability, Buckling, Optimality
Criteria, Cable, Tower.