تطوير نموذج عددي لمسند عزل مطاطي باستخدام خلطة ذاكرة الشكل لرفع الكفاءة الزلزالية للمنشآت الخرسانية المسلحة

الموضوعات

علوم تطبيقية وتكنولوجية

روابط وملفات

التعريف والنوع

رقم الوثيقة

f1cdfa0e-b27e-4ac2-bcff-33fc6ba3fb75

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل دكتوراة

نوع الملف

pdf text

أسماء الملفات

1957820_1.pdf

بيانات النشر

ترجمة العنوان

Developing a Numerical Model of a Rubber Bearing with a Shape Memory Alloy (SMA)for the Seismic Rehabilitation of R/C Buildings

ألقاب المؤلفين

[{"name_ar":"داليا نجار","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"عمار كعدان","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"محمد نزيه اليغشي ايلوش","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

Arabic

المصدر والدورية

اسم المصدر

تطوير نموذج عددي لمسند عزل مطاطي باستخدام خلطة ذاكرة الشكل لرفع الكفاءة الزلزالية للمنشآت الخرسانية المسلحة

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

Seismic base isolation with rubber bearings is considered to be one of the most important techniques which were used in buildings and bridges to reducestructural damage in moderate earthquakes and to prevent collapse in destructive ones.This could be reached by providing a damping mechanism through the reduction of the rubberbearinghorizontal tovertical stiffness ratio.Base isolation provides isolating the structures from its bases, the aforementioned technique increases motion period and reduces story driftsand forces transmitted to the structure.Several recent international researchers demonstratedsome weaknesses of such rubber bearingslike insufficient dissipated energy, and residual displacememnt of the bearing after earthquakes.Therefore, objectives of thisthesisareto develop base rubber bearing by addingspecific metal materials that called Shape Memory Alloys (SMAs).Theyare characterized by its ability to transform from specific phase to another through reversal phase transformations;which result in large recoverable deformation up to 15%, then return to original phase under unloading without any residualdeformation,which meansincreasingthe long-term capabilityoftherubber bearing. Due to the fact thatrubber bearingsconsist ofdifferent materials (rubber, steel) as laminated and bonded layers, it will be of great useful for understanding the mechanical (shear) behavior of these bearings to study and analyze finite element models of these bearings. First, this thesispresenteda comprehensive viewof modeling and analyzingseveral experimental rubber bearingsundercyclic loading depending on finite element method (FEM) utilizing ABAQUS 6.11 software, and comparing the analytical results with reference experimental onesthat were reached by some researchers. Then,thethesisstudied the effect of SMA wires onthe mechanical (shear) behavior of some studied bearings depending on finite element method (FEM) utilizing ANSYS 15 software.Seismic behavior of many exsistingR/Cbuildingswas assessedin the last part of thesis, the effect of both traditional and developed base isolation on such buildings was investigated under many earthquakes depending on ETABS 15 software.This thesis providedmany comparisons betweenfixed and isolated buildings, comparisons included the base shear force, the story drif,the acceleration of last floor, the maximum lateral displacement of the rubber bearing, the residual displacement of the rubber bearing at the end of earthquakesand the dissipated energy by the one rubber bearing.Results showed that incorporating SMA wires into rubber bearings improved the mechanical (shear) behavior of traditional rubber bearingsin terms of energy dissipation capacity and re-centring capability, which means increasing seismic capacity of the rubber bearing.Morover, developed rubber bearings revealed that SMA wires couldenhanceseismic performanceof isolated buildings compared with fixed buildings(non-isolated).

كلمات الباحثين

خلطة ذاكرة الشكل, رفع الكفاءة الزلزالية, منشآت الخرسانية المسلحة

إشراف وإعداد

الإشراف

عمار كعدان, محمد نزيه اليغشي ايلوش

الإعداد

داليا نجار

الاقتباسات الببليوغرافية