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Introduction
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Publications
Publications (17)
In this chapter, stresses and strains are discussed in both 2-D and 3-D, and then a few solutions will be shown under plane stress (or plane strain) condition, which have practical importance.
In this chapter first we discuss the analysis of composite cross sections, such as plywood, fiber reinforced plastics, reinforced concrete or composites. Then it is assumed that the materials of the constituents may behave in a nonlinear manner, which is essential for the analysis of typical building materials.
In this chapter, we consider cases, when unloaded structures are not stress free and/or their strains are not zero. The most important examples are change in temperature, shrinkage, creep, and prestress, which must be taken into account in the analysis of several civil engineering structures.
In this chapter, we take into account that due to the motion of structures inertia forces arise. It many cases, these forces result in the vibration of structures, which may increase the stresses and displacements substantially. It is even more significant when the load is periodic and resonance occurs. This is why the natural frequencies of the st...
As it was presented in the Introduction, when the change in geometry is taken into account in the equilibrium equations, the analysis becomes nonlinear. This effect, specifically for compressed structures, may increase stresses and displacements considerably and may even cause the loss of stability. These phenomena will be discussed in this chapter...
In this chapter, we focus on the membrane theory instead of a comprehensive shell theory. Bending of shells is treated approximately only as an edge disturbance. The basic behavior of shells together with the analyses of a few simple and important cases is presented.
In this chapter, we consider plates, which are loaded dominantly perpendicular to their midplane. Both isotropic and orthotropic plates are discussed, and the second one is the typical model of rib-stiffened floors. Static, buckling, and dynamic analyses are discussed, and the latter one is applied for the vibration control of floors. The analysis...
In Chapter 4, the plastic behaviour of cross sections was discussed. Here statically indeterminate structures are considered, which behave in an elastic-plastic manner. The lower bound (static) and the upper bound (kinematic) theorems are presented and applied for structural analysis.
In this chapter we consider bars (beams and columns), where one direction is substantially bigger than the other two. First in-plane problems are considered including the shear deformations. The shortcomings of the applied theories are emphasized. Then both Saint-Venant and restrained warping induced torque are presented and their role is discussed...
The most important energy principles are discussed in this chapter, which form the theoretical basis for most of the approximate (numerical) methods and may clarify the behavior of structures. Energy principles may also provide an alternative formulation of the governing equations of deformable structures.
Local buckling analysis of thin walled composite beams is presented, where the flanges are stiffened at their free edges. The web and the flanges are modelled by rotationally restrained long orthotropic plates. Explicit expressions are developed for the calculation of the lowest buckling load. For the stability of the flange distortional buckling,...
Approximate expressions to determine the lowest buckling load of short and long composite plates are presented. The plate is subjected to uniaxial compressive load. All the four edges of the plate are elastically restrained by springs or stiffeners. Explicit expressions for the calculation of the lowest buckling load are presented as a function of...
Local buckling analysis of thin-walled open or closed section fiber-reinforced plastic beams is presented. In the analysis, the web is modeled as a long orthotropic plate with rotationally restrained edges. Explicit expressions were developed for the buckling analyses of rectangular (long) plates in a companion paper. These results are applied to d...
Explicit expressions are developed for the buckling analyses of rectangular (long) plates: for ‘linearly varying axial load’ the known results for hinged supports are corrected and new results are presented for built-in and constrained edges; for ‘shear load’ new results are presented for constrained edges; for ‘uniform compression’ new results are...
In this paper first explicit expressions are presented for the calculation of the buckling loads of long, rectangular composite plates with orthotropic layup. In these expressions uniform, linearly varying and shear loads are taken into account, the edges can be constrained, while the constraint coefficients can be different at the two edges. These...
In this paper an approximate earthquake analysis is presented for multistory building structures. The building is stiffened by an arbitrary combination of lateral load-resisting subsystems (shear walls, frames, trusses, coupled shear walls, cores). We consider stories with identical stiffnesses and masses, however the mass at the top floor may be d...