TA378 : Evaluation of ductile elements performance on jacket platform's seismic behaviour
Thesis > Central Library of Shahrood University > Civil & Architectural Engineering > MSc > 2017
Authors:
Amir Chitgar Chari [Author], Mehdi Adjami[Supervisor], Morteza Naghipour [Supervisor]
Abstarct: Different earthquakes are damaging structures baxsed on their strength and stability. Therefore, stability of structures against earthquakes is much important to prevent total or partial failure of structures and loss of financial and human investments of people and country. Jacket platforms used in the oil and gas industry of the country are among the most important structures due to the very important role played by the country's economic cycle. These structures sensetives to environmental motions like wind, ocean waves and earthquake. These movements cause unintended vibration of the structure and thus increase the probability of structural failure and damage to facilities and equipment that are sensitive to the structure. The issue of seismic control and its impact on offshore structures in this study has been investigated. In this research, we have tried to study a new type of energy deprivation in order to reduce the damage to the platform. At the time of the earthquake, the fuse member depreciates a significant portion of the energy input to the structure by by entering to nonlinear stage and forming flexural plastic hinges During an earthquake, the dissipation part depreciates significant part of the energy input to the structure by entering to nonlinear stage and forming flexural plastic hinges. In the event of failure of the proposed element, it also offers easy switching and, in addition, low cost and high speed. To model the proposed element and jacket platform for spectral analysis, the Abaqus finite element software has been used. The results show that although the damper system has not played a significant role in improving the stresses introduced to the members, but in the discussions of the maximum baxse shear imposed to the structure and the maximum displacement of the deck have been effective and significantly improve them.
Keywords:
#Jacket platform #Ductile element #Yielding damper #Offshore structure Link
Keeping place: Central Library of Shahrood University
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