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Optimal Pick‐Up Locations for Irregular Concrete Panels
Author(s) -
ROSCHKE PAUL N.
Publication year - 1989
Publication title -
computer‐aided civil and infrastructure engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.773
H-Index - 82
eISSN - 1467-8667
pISSN - 1093-9687
DOI - 10.1111/j.1467-8667.1989.tb00028.x
Subject(s) - precast concrete , finite element method , structural engineering , constraint (computer aided design) , base (topology) , microcomputer , computer science , minification , penalty method , iterative method , algorithm , mathematical optimization , mathematics , engineering , geometry , mathematical analysis , telecommunications , chip
Aprocedure for minimization of principal stresses produced by initial lateral lifting of precast concrete structural panels is presented. An iterative approach using Powell's conjugate direction method searches for the nearly optimal pickup locations. A penalty function implemented with a nonsequential base takes into account side‐constraint violations. A reasonably good initial guess for the design variables, which are coordinates of the pick‐up locations, is essential. Accuracy of the results is dependent on the number of finite elements. The algorithm works well for a small number of design variables. A standard finite‐element package is used for analysis on a microcomputer. Examples which demonstrate the procedure include a simply supported beam and several plates.