Constraint Processing in Design

by Richard N. Wright, (M.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of Illinois, Urbana, IL,
LeRoy T. Boyer, (M.ASCE), Asst. Prof.; Dept. of Civ. Engrg., Univ. of Illinois, Urbana, IL,
John W. Melin, (M.ASCE), Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Illinois, Urbana, IL,


Serial Information: Journal of the Structural Division, 1971, Vol. 97, Issue 1, Pg. 481-494


Document Type: Journal Paper

Abstract: A constraint is defined as an application of a design criterion at a specific location for a specific loading condition. Computer aids for constraint evaluation have been difficult to implement because various and involved logical procedures are required to build from input data to constraint values. A network-topological description of data relationships from input through derived attributes to constraint values is generalized to treat subscripted attributes. A SEEK procedure provides a simple and efficient algorithm for evaluation of any constraint or attribute. A WARN procedure indicates effects of design changes on the validity of previously derived data. These procedures appear appropriate for use of any specification with computer-aided design procedures such as review, sensitivity analysis, and modification, as well as their synthesis in formal optimization.

Subject Headings: Computer aided design | Sensitivity analysis | Load factors | Algorithms | Computer analysis

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