A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
OPTIMIZATION OF STRUCTURAL FRAMES WITH ELASTIC AND PLASTIC CONSTRAINTS
Structural design methods that employ optimization have traditionally followed one of two approaches: optimal elastic design which considers constraints on elastic stresses; and, optimal plastic design, involving ultimate load constraints. This study addresses elastic and plastic design, incorporated into an iterative scheme for checking both linear elastic stresses and plastic collapse load factors. Structural optimization of steel frames is achieved through material reallocation, which is governed by a generalized stress parameter in those cases where elastic design controls, and by a reduced cost vector from a linear program when the plastic collapse load factor controls. Regression analysis techniques among member properties are employed to reduce the number of independent design variables and to incorporate buckling and axial toad effects for the elastic design. The linear programming optimization procedure is implemented in a computer system developed for the minimum-weight design of steel frames. Our model is applied to one story-one bay, two story-two bay, and three story-five bay frames.
OPTIMIZATION OF STRUCTURAL FRAMES WITH ELASTIC AND PLASTIC CONSTRAINTS
Structural design methods that employ optimization have traditionally followed one of two approaches: optimal elastic design which considers constraints on elastic stresses; and, optimal plastic design, involving ultimate load constraints. This study addresses elastic and plastic design, incorporated into an iterative scheme for checking both linear elastic stresses and plastic collapse load factors. Structural optimization of steel frames is achieved through material reallocation, which is governed by a generalized stress parameter in those cases where elastic design controls, and by a reduced cost vector from a linear program when the plastic collapse load factor controls. Regression analysis techniques among member properties are employed to reduce the number of independent design variables and to incorporate buckling and axial toad effects for the elastic design. The linear programming optimization procedure is implemented in a computer system developed for the minimum-weight design of steel frames. Our model is applied to one story-one bay, two story-two bay, and three story-five bay frames.
OPTIMIZATION OF STRUCTURAL FRAMES WITH ELASTIC AND PLASTIC CONSTRAINTS
Akbora, Baha Aydin (author) / Corotis, Ross B. (author) / Ellis, J. Hugh Associate Professor (author)
Civil Engineering and Environmental Systems ; 10 ; 147-169
1993-05-01
23 pages
Article (Journal)
Electronic Resource
English
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