The paper presents an analysis of the effect of boundary conditions and axial deformation on the critical buckling loads of the geometrically perfect elastic two-layer composite columns with interlayer slip between the layers. It is shown that the boundary conditions of such composite columns are interrelated in both longitudinal and transverse directions. The parametric analysis reveals that the influence of longitudinal boundary conditions on critical buckling load can be significant. In contrast, the influence of axial deformation is negligible.
COBISS.SI-ID: 5069153
A new mathematical model and its finite element formulation for the non-linear analysis of mechanical behaviour of a two-layer timber planar beam is presented. It is assumed that non-linear material can differ from layer to layer; the slip and uplift laws are non-linear; the kinematics is linear. The theory is validated by the experimental results of full-scale laboratory tests. It is found out that the type of the slip law strongly dictates the deformability of the composite beam.
COBISS.SI-ID: 4917089
The paper discusses the effects of slip between the layers and moisture transfer on the behaviour of a planar steel–concrete composite beam subject to fire conditions. The mechanical behaviour accounting for slip is described by strain-based beam finite elements. The present novel finite-element formulation proves to be appropriate for the thermo-mechanical analysis of frame-like structures, as it is robust, reliable and accurate.
COBISS.SI-ID: 5154913
The 4-node quadrilateral membrane elements AGQ6-I and II are two novel incompatible models formulated by the QAC Method. In this paper the sufficient conditions for their convergence are theoretically established. It is further shown that the convergence in the energy norm is linear, and in the L2 norm quadratic provided that certain geometric conditions are met. The results of numerical examples completely confirm the theoretical findings.
COBISS.SI-ID: 5014881
Size, shape, and drive optimization procedures are combined with an energy-conserving time-integration scheme for the dynamic analysis of planar geometrically non-linear frame structures undergoing large overall motions. Finite axial, bending, and shear strains are considered. The design variables are size, shape, and drive. The shape and the driving function of a load-moving robot arm are optimized to reduce oscillations in its final position. The shape of a steel frame is optimized to reduce oscillations after an idealized ground motion jerk.
COBISS.SI-ID: 13768214