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Afşin Sarıtaş

Department of Civil Engineering
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Free vibration characteristics of a 3d mixed formulation beam element with force-based consistent mass matrix
Soydas, Ozan; Sarıtaş, Afşin (2017-09-01)
In this analytical study, free vibration analyses of a 3d mixed formulation beam element are performed by adopting force-based consistent mass matrix that incorporates shear and rotary inertia effects. The force-based appr...
Consistent matrices for steel framed structures with semi-rigid connections accounting for shear deformation and rotary inertia effects
ÖZEL, HALİL FIRAT; Sarıtaş, Afşin; Tasbahji, Tayseer (2017-04-15)
Estimation of vibration characteristics and thus the seismic loads acted on steel framed structures are influenced by the presence of semi-rigid connections and accurate modeling of shear deformations and rotary inertia ef...
Hybrid finite element for analysis of functionally graded beams
Sarıtaş, Afşin; Gurol, Tolga; Soydas, Ozan (2017-01-01)
A hybrid finite element model is presented, where stiffness and mass distributions over a beam with functionally graded material (FGM) are accurately modeled for both elastic and inelastic material responses. Von Mises and...
Comparison of chevron and suspended-zipper braced steel frames
Ozcelik, Yigit; Sarıtaş, Afşin; Clayton, Patricia M. (2016-03-01)
Suspended-zipper braced frame is a modified configuration of chevron braced frame in which zipper columns are added between story beams and a hat truss is attached between top two stories in order to redistribute the unbal...
Distributed inelasticity planar frame element with localized semi-rigid connections for nonlinear analysis of steel structures
Sarıtaş, Afşin; KÖSEOĞLU, AHMET (2015-06-01)
A macro-element model with spread of inelasticity and localized nonlinear semi-rigid hinges is presented in this paper. The element is formulated through force-based approach. Spread of inelasticity along element length an...
Assessing the Effects of Mechanical Preventive Measures on Alkali-Silica Reaction Expansion with Accelerated Mortar Bar Test
Musaoglu, Orhan; TURANLI, LUTFULLAH; Sarıtaş, Afşin (ASTM International, 2014-11-01)
This paper presents a modification to the apparatus of the mortar bar test of ASTM C490 in order to assess and compare the influence of mechanical preventive measures in reducing alkali-silica reaction (ASR) expansion in c...
Analysis of RC walls with a mixed formulation frame finite element
Sarıtaş, Afşin; Filippou, Filip C. (2013-10-01)
This paper presents a mixed formulation frame element with the assumptions of the Timoshenko shear beam theory for displacement field and that accounts for interaction between shear and normal stress at material level. Non...
An accurate nonlinear 3d Timoshenko beam element based on Hu-Washizu functional
Soydas, Ozan; Sarıtaş, Afşin (Elsevier BV, 2013-09-01)
An accurate 3d mixed beam element that is efficient especially in nonlinear analysis is presented in this paper. The mathematical theory is based on Hu-Washizu principle that uses three-fields in the variational form. The ...
Variational base and solution strategies for non-linear force-based beam finite elements
Sarıtaş, Afşin; Soydas, Ozan (2012-04-01)
This paper presents the variational bases for the non-linear force-based beam elements. The element state determination of these elements is obtained exactly from a two-field functional with independent stress and strain f...
Strengthening the structural behavior of adobe walls through the use of plaster reinforcement mesh
TURANLI, LUTFULLAH; Sarıtaş, Afşin (2011-04-01)
This study presents an experimental investigation on the use of additives and plaster mesh in adobe wall panels. Three different groups of adobe soil mixture are considered for forming adobe blocks in wall panels with and ...