MICRO STRESS: STRUCTURAL ANALYSIS PROGRAM

A methodology of nonlinear analysis of timber frame structures with flexible connections has been developed in this paper. The methodology is based on the results of experimental investigation of connections behavior under static and cycling loading. The adopted numerical method is based on the concept of localized nonlinearity which facilitates the reproduction of the experimentally determined connections behavior in the analysis of frame structures. The methodology is also applicable to other types of timber structures.

Distributed plasticity analysis of steel frame structures comprising non-compact sections

Application of “advanced analysis” methods suitable for non-linear analysis and design of steel frame structures permits direct and accurate determination of ultimate system strengths, without resort to simplified elastic methods of analysis and semi-empirical specification equations. However, the application of advanced analysis methods has previously been restricted to steel frames comprising only compact sections that are not influenced by the effects of local buckling. A concentrated plasticity formulation suitable for practical advanced analysis of steel frame structures comprising non-compact sections is presented in this paper. This formulation, referred to as the refined plastic hinge method, implicitly accounts for the effects of gradual cross-sectional yielding, longitudinal spread of plasticity, initial geometric imperfections, residual stresses, and local buckling.

This paper examined the use of the dynamic magnification factor in the analysis of framed structures. It is a method of practice in dynamic analysis of structures to magnify static response by a dynamic magnification factor in order to obtain the equivalent dynamic response. This method has been applied to the dynamic analysis of many structures including bridges and some country’s codes of practice made specifications in respect of the dynamic magnification factor for the analysis and design of various types of structures subjected to dynamic excitation. The suitability of this method to the dynamic analysis of frames was investigated in this paper by carrying out static and dynamic analysis of four frames using the flexible frame model and the stiffness formulation. Dynamic responses were first obtained by direct analysis as solutions to the set of equations governing the motions of the frames and secondly by the magnification of the static responses using the dynamic magnification factors. By comparing the results obtained in both methods it was inferred that the practice of magnifying static responses to obtain their dynamic equivalents in frame analysis gives correct results only in the case of deflections and not in stresses. Finally, this practice should de discouraged or limited only to the case of deflections in the dynamic analysis of framed structures.

A time-domain spectral element method with C1 continuity for static and dynamic analysis of frame structures

Matrix method for stability and second-order analysis of Timoshenko beam-column structures with semi-rigid connections

Chapter 10 Modeling and analysis of frame structures

The present study is concerned with the physical explanations of the linear and the cubic finite elements for beams and axisymmetric shells through the comparisons of their strain energy approximations with those of the Rigid Bodies-Spring Models which are the discrete elements suitable to the plastic collapse analysis using the concepts of plastic hinges and hinge lines. The established conditions for the equivalence between these two modelings, which are given as the relations between the locations of the numerical integration points and those of the occurrece of plastic hinges, can be conveniently used in the economical plastic collapse analysis of framed structures and axisymmetric shells where the locations of plastic hinge formations are controlled by the movement of numerical integration points. Some numerical results are shown in order to prove numerically the obtained relations and to verify the validity of the proposed shifting technique of numerical integration points, which is identified as 'the shifted integration technique' in the present paper.

Efficiency of dynamic relaxation methods in nonlinear analysis of truss and frame structures

Analysis of framed tube structures of arbitrary sections

Applications of simplified 3D FE model in seismic analysis for friction-damped posttensioned steel frame structures

The exact stability stiffness matrix for the analysis of multi-cracked frame structures

Elastostatic interaction analysis of frames resting on homogeneous elastic half-space

Carbon emission energy management analysis of LCA-Based fabricated building construction

Structural safety analysis of fixed offshore platforms