A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Computer-Automated Optimal Design of Structural Steel Frameworks
Abstract This lecture concerns the computer-automated design of least-weight structural frameworks. First, steel structures under static loads are considered and members are automatically sized using commercial standard steel sections in full conformance with steel design standard provisions for strength/stability and stiffness. The necessary features and functions of such a design system are identified, and the underlying synthesis strategy is discussed. This aspect of the design system is illustrated using a corresponding professional-practise software code that is applied for the least-weight design of a steel mill crane framework comprised of a variety of member types and subject to a number of load effects. The capabilities of the system are then extended to allow for the least-weight design of structural frameworks under both service and ultimate loading conditions. Here, acceptable elastic stresses and displacements are ensured at the service-load level while, simultaneously, adequate safety against plastic collapse is ensured at the ultimate-load level. This aspect of the design system is illustrated using a prototype software code that is applied for the least-weight design of an aluminum tunnel-ring frame subjected to gravity and internal pressure loading. Finally, the computer-based design methodology is extended to the least-weight design of structural frameworks subjected to dynamic loading. Constraints are placed on dynamic displacements, dynamic stresses, natural frequencies and member sizes. Extreme responses are identified so as to convert the time-parametric design problem in an explicit non-parametric form. The method is shown to be capable of designing structures under simultaneous static and dynamic loading. A prototype software code is applied for the least-weight design of a steel trussed arch subjected to non-structural masses and an impulse force.
Computer-Automated Optimal Design of Structural Steel Frameworks
Abstract This lecture concerns the computer-automated design of least-weight structural frameworks. First, steel structures under static loads are considered and members are automatically sized using commercial standard steel sections in full conformance with steel design standard provisions for strength/stability and stiffness. The necessary features and functions of such a design system are identified, and the underlying synthesis strategy is discussed. This aspect of the design system is illustrated using a corresponding professional-practise software code that is applied for the least-weight design of a steel mill crane framework comprised of a variety of member types and subject to a number of load effects. The capabilities of the system are then extended to allow for the least-weight design of structural frameworks under both service and ultimate loading conditions. Here, acceptable elastic stresses and displacements are ensured at the service-load level while, simultaneously, adequate safety against plastic collapse is ensured at the ultimate-load level. This aspect of the design system is illustrated using a prototype software code that is applied for the least-weight design of an aluminum tunnel-ring frame subjected to gravity and internal pressure loading. Finally, the computer-based design methodology is extended to the least-weight design of structural frameworks subjected to dynamic loading. Constraints are placed on dynamic displacements, dynamic stresses, natural frequencies and member sizes. Extreme responses are identified so as to convert the time-parametric design problem in an explicit non-parametric form. The method is shown to be capable of designing structures under simultaneous static and dynamic loading. A prototype software code is applied for the least-weight design of a steel trussed arch subjected to non-structural masses and an impulse force.
Computer-Automated Optimal Design of Structural Steel Frameworks
Professor Grierson, Donald E. (author)
1992-01-01
27 pages
Article/Chapter (Book)
Electronic Resource
English
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