پديد آورنده :
رضائي، مهدي
عنوان :
بررسي رفتار لوله هاي مدفون فولادي تحت اثر روانگرايي با استفاده از روش اجزا محدود
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران
صفحه شمار :
[نه]، 126 ،[II]ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
اميرمهدي حلبيان، حميد هاشم الحسيني
توصيفگر ها :
سيلان خاك , تحرك دوره اي , روش Seed , چگالش , ويسكوالاستيك
تاريخ نمايه سازي :
04/09/86
استاد داور :
محمود قضاوي ، بهروز كوشا
تاريخ ورود اطلاعات :
1396/03/07
چكيده فارسي :
به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
ABSTRACT Ever growing urban society increased the importance of lifelines on public life One ofthe most important lifelines is buried pipelines transmitting Water and Gas Most important cause to damages to pipelines is permanent deformations due to groundexcitations Deformations can be categored transient and permanent Transient displacementsoccur due to wave effect and permanent deformations occur due to geotechnical events such asliquefaction and fault action The liquefaction is reported as the major cause damagespipelines during and after earthquake To evaluate seismic behavior of buried pipelines subjected to large deformation appropriate none linear cyclic stress strain relationship should be implemented in anynumerical method Among the phenomena witch cause permanent ground deformation thesettlement and lateral spreading induced by liquefaction are considered as the main cause ofdamage in buried structures Therefore this study is aimed to take into account the potential ofliquefaction during an earthquake into numerical analysis of buried pipelines using FEM During the earthquake the soil volume and also pore pressure water is changed therefore assaturated loose sand undergo simple shear deformation the stiffness at any time is changed asfunction of the mean normal effective stress In this study a hypo elastic model is adopted forthe soil to evaluate changes in the pore pressure and also effective stresses during theexcitation In a finite element modeling for the areas not expecting liquefaction to occur thepipe is modeled using beam elements and soil is modeled by some bi linear springs while forliquefied areas the pipe is modeled by shell elements and solid elements are used to modelsurrounding soil
استاد راهنما :
اميرمهدي حلبيان، حميد هاشم الحسيني
استاد داور :
محمود قضاوي ، بهروز كوشا
