Techno Press


Steel and Composite Structures   Volume 3, Number 4, August 2003, pages 277-287
DOI: http://dx.doi.org/10.12989/scs.2003.3.4.277
 
The optimisation method of the elastic-plastic spatial grid structures
Jan Karczewski

 
Abstract     [Full Text]
    The low boundary of load carrying capacity of the elastic-plastic spatial grid structures depend on numerous values and their variability assumed in designing process. Analysed influence all this values in searching for optimal variant of the structure lead to too great problem even taking into consideration actualrncomputational power we have in disposal. Therefore one can take only a few values which have greatest influence on the optimal choice. In optimal analysis of the elastic-plastic spatial grid structures the previously proposed method with subsequent modification (Karczewski 1980), (Karczewski, Barszcz and Donten 1996), (Karczewski and Donten 2001) as well as computer program which was worked out by Donten K. to make possible practical utilisation this method was employed. The paper deal with evaluation of influence dimensions of particular values for choice of optimal variant of the structure. One among this values isrndistribution of the struts in the structure.
 
Key Words
    spatial grid structures; plastic analysis; optimisation; decisive variable; objective function; distribution of the strut.
 
Address
The Building Structures Institute, Warsaw University of Technology, Ul. Armii Ludowej 16, 00-673 Warsaw, Poland
 

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