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نهمین کنگره بین المللی مهندسی عمران
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • error estimation of infinite element in geotechnical problems

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    • تاریخ ارائه: 1390/11/15
    • تاریخ انتشار در تی پی بین: 1390/11/15
    • تعداد بازدید: 715
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     in most seismic and geotechnical problems, for analysis of a region, at least one direction of the region extends to infinite. in usual methods of static analysis, for modeling infinite effects, domain over interest point needs to be considered big enough and the displacements to be fixed at boundary (dirichlet boundary). in conventional methods of dynamic analysis, damping ratio may be supposed higher than material damping to avoid effects of receiving reflected wave from artificial boundary. also, increasing dimensions of the region to be confident of those waves can’t touch the boundary and propagate inside again. in such cases increasing in degrees of freedom is not economical and the accuracy of the results is not guaranteed. an efficient method in showing effects of far field on near field is implementation of infinite element. for this reason it is necessary to have sufficient knowledge of the method’s accuracy and the mechanism of importing errors in the results. the most important issue in using infinite elements is the type of their decay functions. therefore, in this research, infinite elements with different decay function are implemented in some singular geotechnical problems and accordingly calibrations of their parameters to reduce their induced errors are revealed.

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