Optimum Plastic Design of a Portal Frame for Alternative Loads

1967 ◽  
Vol 34 (3) ◽  
pp. 772-773 ◽  
Author(s):  
W. Prager
Keyword(s):  
Minimum Weight ◽  
Necessary Condition ◽  
Minimum Weight Design ◽  
Plastic Design ◽  
Portal Frame ◽  
Weight Design

Minimum-weight design of a portal frame for alternative combinations of horizontal and vertical loads is discussed. It is shown that the usual proof of the existence of a Foulkes mechanism as a necessary condition for minimum weight cannot be carried over to this problem.

On Foulkes Mechanism in Portal Frame Design for Alternative Loads

1969 ◽  
Vol 36 (1) ◽  
pp. 73-75 ◽  
Author(s):  
H. S. Y. Chan
Keyword(s):  
Minimum Weight ◽  
Sufficient Condition ◽  
Programming Formulation ◽  
Necessary And Sufficient Condition ◽  
Minimum Weight Design ◽  
Frame Design ◽  
Portal Frame ◽  
Linear Programming Formulation ◽  
Weight Design ◽  
Necessary And Sufficient

Minimum-weight design of a portal frame for alternative loadings is discussed. A linear programming formulation is used. The concept of Foulkes mechanism as the necessary and sufficient condition for optimum is generalized for this class of problems.

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