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- 저자 : Abdurrahman Şahin (검색결과 2 건)
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Computational finite element model updating tool for modal testing of structures
Abdurrahman Şahin,Alemdar Bayraktar 국제구조공학회 2014 Structural Engineering and Mechanics, An Int'l Jou Vol.51 No.2
In this paper, the development of a new optimization software for finite element model updating of engineering structures titled as FemUP is described. The program is used for computational FEM model updating of structures depending on modal testing results. This paper deals with the FE model updating procedure carried out in FemUP. The theoretical exposition on FE model updating and optimization techniques is presented. The related issues including the objective function, constraint function, different residuals and possible parameters for FE model updating are investigated. The issues of updating process adopted in FemUP are discussed. The ideas of optimization to be used in FE model updating application are explained. The algorithm of Sequential Quadratic Programming (SQP) is explored which will be used to solve the optimization problem. The possibilities of the program are demonstrated with athree dimensional steel frame model. As a result of this study, it can be said that SQP algorithm is very effective in model updating procedure.
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Evaluation of rigid-end offset effect on seismic behavior of a structure subjected to Van earthquake
Serkan Bekiroğlu,Abdurrahman Şahin,Barış Sevim,Yusuf Ayvaz 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.47 No.6
Numerical damage assessment of Van train station building consisting of three RC blocks due to 2011 Van Earthquakes by nonlinear dynamic analysis is presented. The structural model is created with rigid-end offsets and plastic hinges for nonlinear analysis. Rigid-end offsets are considered for connection areas and proposed for wall-supported elements. In wall-supported elements, walls take place in a limited part of the columns. Nonlinear dynamic analysis of the building with and without rigid-end offsets is performed by using real earthquake records and results are compared. The results show that rigid-end offsets have significant effects on the seismic behavior of the structures.
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