3659

3459

كارشناسي ارشد

زلزله

اصفهان : دانشگاه صنعتي اصفهان ،دانشكده عمران

1386

[پانزده]،[120]،[II]ص. : مصور ،نمودار

ص.ع. به فارسي و انگليسي

محمد مهدي سعادت پور

امير مهدي حلبيان

5/15/86

سعيد ضيايي راد ، مرتضي مدح خوان

مهندسي عمران

ID3459

به فارسي و انگليسي :قابل رويت به صورت نسخه ديجيتال

Abstract Considering the flexibility of the foundation leads to soil structure interaction SSI analysis Because of the dependency of soil stiffness and damping on excitation frequency in the conventional approach both soil stiffness and damping are refered to as the complexstiffness or the so called impedance function But in case of using the impedance function it is impossible to perform a nonlinear soil structure interaction analysis However most ofbase isolation systems enter the inelastic region very quickly while excited by anearthquake Therefore in such cases an alternative approach to describe soil stiffness anddamping must be used On of these approaches is the lumped parameter method To study the effect of soil structure interaction on isolated structures firstly the relevantparameters on soil structure interaction and dynamic response of isolated structures mustbe spotted Afterwards the effectiveness of each of these parameters should be accountedfor The most effective feature of foundation on SSI is the shear wave velocity Concerningthe friction pendulum systems FPS which is the focus of this study the mass of structureand the bearing radius are the most important factors It turns out that the ratio of theisolated structure period to the initial structure period is also of some importance Payingspecial attention to these parameters this thesis study the effect of SSI on frictionpendulum base isolated structures An isolated structure is modeled by SAP2000 softwarefor tow cases of rigid and flexible foundation After a comparison between the results theshear wave velocity and the isolation period seem to stand out as the most effective factorson the dynamic response of friction pendulum base isolated structures so that if the productof the isolation period and the shear wave velocity falls within a certain interval considering SSI have a detrimental effect on seismic response

محمد مهدي سعادت پور

امير مهدي حلبيان

سعيد ضيايي راد ، مرتضي مدح خوان