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    Sensitivity of Optimum Designs for Spatially Varying Ground Motions

    Source: Journal of Structural Engineering:;2001:;Volume ( 127 ):;issue: 011
    Author:
    Makoto Ohsaki
    DOI: 10.1061/(ASCE)0733-9445(2001)127:11(1324)
    Publisher: American Society of Civil Engineers
    Abstract: An optimization method is presented for long-span frames for specified seismic responses considering spatial variation of ground motions. The response is evaluated by using a response spectrum approach, where incoherency effect, wave passage effect, and local amplification effect are considered. Sensitivity coefficients of the optimum objective value with respect to the parameters defining spatial variation of the seismic motions are computed based on the parametric programming method or postoptimal analysis. It is shown that the second-order parametric sensitivity coefficients are easily obtained if the first-order coefficients vanish due to symmetry and antisymmetry conditions of structure and ground motions. In the examples, optimum designs are found for an arch-type frame and the results of postoptimal analysis are verified in comparison with the parametric sensitivity coefficients by the central difference method. It is shown that the spatial variation of ground motions leads to the increase of the optimal structural volume under constraints on member strains.
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      Sensitivity of Optimum Designs for Spatially Varying Ground Motions

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    http://yetl.yabesh.ir/yetl1/handle/yetl/33520
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    contributor authorMakoto Ohsaki
    date accessioned2017-05-08T20:57:53Z
    date available2017-05-08T20:57:53Z
    date copyrightNovember 2001
    date issued2001
    identifier other%28asce%290733-9445%282001%29127%3A11%281324%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/33520
    description abstractAn optimization method is presented for long-span frames for specified seismic responses considering spatial variation of ground motions. The response is evaluated by using a response spectrum approach, where incoherency effect, wave passage effect, and local amplification effect are considered. Sensitivity coefficients of the optimum objective value with respect to the parameters defining spatial variation of the seismic motions are computed based on the parametric programming method or postoptimal analysis. It is shown that the second-order parametric sensitivity coefficients are easily obtained if the first-order coefficients vanish due to symmetry and antisymmetry conditions of structure and ground motions. In the examples, optimum designs are found for an arch-type frame and the results of postoptimal analysis are verified in comparison with the parametric sensitivity coefficients by the central difference method. It is shown that the spatial variation of ground motions leads to the increase of the optimal structural volume under constraints on member strains.
    publisherAmerican Society of Civil Engineers
    titleSensitivity of Optimum Designs for Spatially Varying Ground Motions
    typeJournal Paper
    journal volume127
    journal issue11
    journal titleJournal of Structural Engineering
    identifier doi10.1061/(ASCE)0733-9445(2001)127:11(1324)
    treeJournal of Structural Engineering:;2001:;Volume ( 127 ):;issue: 011
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian