Browsing by Author "Mistakidis, E. S."
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Bending resistance of composite slabs made with thinwalled steel sheeting with indentations or embossments
Mistakidis, E. S.; Dimitriadis, K. G. (2008)The paper studies the behaviour of thinwalled steel sheeting with embossments. The study aims to determine the contribution of the embossed areas of the steel sheeting to the total strength in pure tension and in pure ... 
Buckling behaviour of thinwalled cold formed steel platforms subjected to bending
Tzaros, K. A.; Mistakidis, E. S. (2008)The paper studies the behaviour of thin walled cold formed steel beams in bending, through nonlinear finite element analysis. These types of beams are usually used as platforms in scaffold configurations. The research aims ... 
Determination of the load  displacement curve of moment resisting steel frames under horizontal loading
Karakostas, S. M.; Mistakidis, E. S. (2001)Seismic resistant steel frames are very common in regions of high seismic risk due to their excellent characteristics in terms of strength and ductility. For the evaluation of the total ductility, various methods have been ... 
Evaluation of the ductility features in steel structures with softening momentrotation behaviour based on a nonconvex optimization formulation
Karakostas, S. M.; Mistakidis, E. S. (2000)In order to determine the ductility features of steel structures, several approaches have been introduced in the bibliography. In this paper a certain method is proposed which considers the actual form of the momentrotation ... 
Experimental and numerical study of the behaviour of high dissipation metallic devices for the strengthening of existing structures
Karalis, A. A.; GeorgiadiStefanidi, K. A.; Salonikios, T. N.; Stylianidis, K. C.; Mistakidis, E. S. (2011)The use of steel bracing systems for the strengthening of existing reinforced concrete (RC) frames may lead to increase of both strength and stiffness. However, in most of the cases the main target is the increase of the ... 
Failure modes of circular hollow members with flattened edges
Mistakidis, E. S.; Tsiogas, S. V. (2003)In this paper, the behaviour of circular hollow members with flattened edges is studied. Starting from experimental testing, an unexpected failure mode under compressive loading is demonstrated, which is connected with the ... 
Friction evolution as a result of roughness in fractal interfaces
Mistakidis, E. S.; Panagouli, O. K. (2003)In this paper, the influence of fractal interface geometry to the evolution of the friction mechanism is studied The paper is based on fractal approaches for the modelling of the multiscale selfaffine topography of these ... 
Fuzzy sets in seismic inelastic analysis and design of reinforced concrete frames
Mistakidis, E. S.; Georgiou, D. N. (2003)In this paper, a new approach to the problem of estimating the structural response of systems with uncertain characteristics is presented. The approach is based on the theory of fuzzy sets, which allow the designers to ... 
A heuristic method for nonconvex optimization in mechanics: Conceptual idea, theoretical justification, engineering applications
Mistakidis, E. S. (2000)Structures involving nonmonotone, possibly multivalued reactiondisplacement or stressstrain laws cannot be effectively treated by the numerical methods for classical nonlinearities. In this paper we make use of the fact ... 
A mathematical method for the determination of the critical axial loads of continuous beams with unilateral constraints for various initial geometric imperfections
Tzaros, K. A.; Mistakidis, E. S. (2013)This paper deals with the calculation of the axial critical loads of continuous beams with unilateral constraints. The paper emphasizes in the determination of the instability loads of continuous beams with initial geometric ... 
A multi resolution study on the behavior of fractal interfaces with unilateral contact conditions
Panagouli, O. K.; Mistakidis, E. S. (2013)In this paper, the influence of the resolution of fractal interfaces to the contact area is investigated by taking into account shear displacements. The paper is based on fractal approaches for the modeling of the multiscale ... 
A neural network approach for the solution of frictional contact problems with nonconvex superpotentials
Mistakidis, E. S. (2002)A neural network approach is proposed for the numerical treatment of frictional contact problems. A nonmonotone friction law is assumed to describe the stickslip process which leads to the formulation of a computational ... 
A numerical model based on nonconvexnonsmooth optimization for the simulation of bending tests on composite slabs with profiled steel sheeting
Tzaros, K. A.; Mistakidis, E. S.; Perdikaris, P. C. (2010)It is well known that the Calculation Of the ultimate strength of composite concrete slabs with profiled steel sheeting requires the determination of the longitudinal shear resistance which depends on the quality of the ... 
Numerical simulation of bending response of reinforced concrete and fibrereinforced concrete beams
GeorgiadiStefanidi, K. A.; Mistakidis, E. S.; Perdikaris, P. C. (2008)The aim of this work is to understand the behaviour of members made of fibre reinforced concrete (FRC). The members under study were fibre reinforced concrete beams with no conventional reinforcement, as well as fibre ... 
Parametric analysis of axially loaded RHS gap Kjoints by means of 2D and 3D F.E. models
Mistakidis, E. S.; Baniotopoulos, C. C. (2003)In the present paper the behaviour of steel structural RHS gap Kjoints under static loading is studied by applying the Finite Element Method. The analysis is performed by the development of both 2D and 3D models of gap ... 
Seismic retrofitting of steel and concrete structures using lowyield strength shear panels
De Matteis, G.; Mistakidis, E. S.; Formisano, A.; Tsirnovas, S. I. (2005)The paper addresses the problem of seismic retrofitting of existing concrete structures through an innovative methodology based on low yield strength metal shear panels. These panels are introduced in specific places of ... 
Solution of interface problems with nonmonotone contact and friction laws using a neural network optimization environment
Mistakidis, E. S. (2004)The paper addresses the solution of interface problems which present a degrading behaviour leading to nonmonotone contact and friction laws. The paper is based on a superpotential formulation that leads to hemivariational ... 
Solution of nonmonotone friction unilateral contact problems within a neural network environment
Mistakidis, E. S. (2002)A neural network approach for dealing with the solution of frictional contact problems is proposed. Such an approach permits the rational treatment of the aforementioned limit states. In particular, discretizing the structure ... 
SPECIAL ISSUE CivilComp
Arruda, J. R.; Marti, K.; Soares, C. M. M.; Mistakidis, E. S.; Schueller, G. I.; Papdrakakis, M.; Topping, B. H. V. (2011) 
Strength evalution of retrofit shear wall elements with interfaces of fractal geometry
Mistakidis, E. S.; Panagouli, O. K. (2002)In the present paper structures involving rough interfaces, with irregularities of all scales, are simulated with the help of fractal Geometry. More specifically, the approach followed is the multilevel hierarchical approach. ...