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    Computer‐Automated Design of Semirigid Steel Frameworks

    Source: Journal of Structural Engineering:;1993:;Volume ( 119 ):;issue: 006
    Author:
    Lei Xu
    ,
    Donald E. Grierson
    DOI: 10.1061/(ASCE)0733-9445(1993)119:6(1740)
    Publisher: American Society of Civil Engineers
    Abstract: This paper presents an efficient computer‐automated method for the optimum design of steel frameworks accounting for the behavior of semirigid connections. The method explicitly accounts for both connections and members by taking connection stiffnesses and member sizes as continuous‐valued and discretevalued variables to the design process, respectively. A continuous‐discrete optimization algorithm is applied to minimize the ‘cost’ of the connections and members for the structure subject to constraints on stresses and displacements under specified design loads. Two steel framework examples are presented to illustrate the features of the design method. It is shown that the design optimization determines connection stiffnesses that are entirely consistent with those for the actual (bolted/ welded) connections employed in conventional steel frameworks, but that member sizes are somewhat different from those found when the connections are (artificially) assumed to be fully rigid. That is, the results suggest that the proposed semirigid design method realistically accounts for connection behavior and produces more appropriate member sizes than does the traditional fully rigid design method.
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      Computer‐Automated Design of Semirigid Steel Frameworks

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    contributor authorLei Xu
    contributor authorDonald E. Grierson
    date accessioned2017-05-08T20:55:08Z
    date available2017-05-08T20:55:08Z
    date copyrightJune 1993
    date issued1993
    identifier other%28asce%290733-9445%281993%29119%3A6%281740%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/31717
    description abstractThis paper presents an efficient computer‐automated method for the optimum design of steel frameworks accounting for the behavior of semirigid connections. The method explicitly accounts for both connections and members by taking connection stiffnesses and member sizes as continuous‐valued and discretevalued variables to the design process, respectively. A continuous‐discrete optimization algorithm is applied to minimize the ‘cost’ of the connections and members for the structure subject to constraints on stresses and displacements under specified design loads. Two steel framework examples are presented to illustrate the features of the design method. It is shown that the design optimization determines connection stiffnesses that are entirely consistent with those for the actual (bolted/ welded) connections employed in conventional steel frameworks, but that member sizes are somewhat different from those found when the connections are (artificially) assumed to be fully rigid. That is, the results suggest that the proposed semirigid design method realistically accounts for connection behavior and produces more appropriate member sizes than does the traditional fully rigid design method.
    publisherAmerican Society of Civil Engineers
    titleComputer‐Automated Design of Semirigid Steel Frameworks
    typeJournal Paper
    journal volume119
    journal issue6
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)0733-9445(1993)119:6(1740)
    treeJournal of Structural Engineering:;1993:;Volume ( 119 ):;issue: 006
    contenttypeFulltext
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