Showing papers in "Computers & Structures in 2004"

TL;DR: A new structural optimization method based on the harmony search (HS) meta-heuristic algorithm, which was conceptualized using the musical process of searching for a perfect state of harmony to demonstrate the effectiveness and robustness of the new method.

TL;DR: A new RBDO methodology developed integrating the HMV method with a proposed response surface method, which is specifically developed for reliability analysis and optimization, is developed.

TL;DR: In this paper, a computational methodology for dynamic analysis of multibody mechanical systems with joint clearance is presented, based on a thorough geometric description of contact conditions and on a continuous contact force model, which represents the impact forces.

TL;DR: In this article, the use of the Murakami zig-zag function (MZZF) in the two-dimensional modeling of multilayered plates and shells is discussed.

TL;DR: In this article, the use of a 3D discrete element method (DEM) is proposed to study concrete submitted to dynamic loading, and the model has already been validated through quasi-static simulations.

TL;DR: In this article, a simple methodology to design isotropic triangular shell finite elements based on the Mixed Interpolation of Tensorial Components (MITC) approach is presented, which performs well-established numerical tests and shows the performance of the new elements.

TL;DR: Evidence theory is proposed as an alternative to the classical probability theory to handle the imprecise data situation and the possibility of adopting evidence theory as a general tool of UQ analysis for large-scale built up structures is investigated with an algorithm that can alleviate the computational difficulties.

TL;DR: In this paper, a beam element formulation and solution procedure for progressive collapse analysis of planar frame structures is presented, and the significance of dynamic load redistribution following the failure of one or more elements is addressed.

TL;DR: Based on a fully 3D elasto-plastic damage theory, the material behavior of all reinforced concrete components, including concrete, reinforcement and bond, is realistically modelled, including cyclic action as mentioned in this paper.

TL;DR: A procedure is proposed in which the numerical results from a Monte Carlo reliability estimation procedure are converted to a form that will allow the basic ideas of the first order reliability method to be employed and allows sensitivity estimates of low computational cost to be made.

TL;DR: In this article, the von Karman nonlinear strain-displacement relationship is used for large-amplitude (geometrically nonlinear) vibrations of rectangular plates subjected to radial harmonic excitation in the spectral neighborhood of the lowest resonances.

TL;DR: In this paper, a partial mixed layerwise finite element model for adaptive plate structures is presented by considering a Reissner mixed variational principle, and the mixed functional is formulated using transverse stresses, displacement components and electric and magnetic potentials as primary variables.

TL;DR: In this article, a constitutive model for simulation of the cyclic behaviour of interface elements is proposed, which is fully based on the plasticity theory, and two new yield surfaces are introduced in order to include non-linear unloading/reloading behavior in an accurate fashion.

TL;DR: In this article, a finite element-based coupled ship and fluid model is used to analyze the ship's structural and structural properties, and three-dimensional ship shock modeling and simulation has been performed and the predicted results were compared with ship shock test data.

TL;DR: This work makes a feasibility study and introduces a parallel algorithm to achieve the computational efficiency of a two-scale analysis method for nonlinear heterogeneous solids with periodic microstructures.

TL;DR: Inter-relationships within the constrained multi-objective immune algorithm (CMOIA) resemble antibody–antigen relationships in terms of specificity, germinal center, and the memory characteristics of adaptive immune responses.

TL;DR: In this paper, an analytical bond stress-slip relationship was obtained using the results of an experimental program with pullout-bending tests and developing a numerical strategy, which can be used to assess relevant information in the design of concrete structures strengthened by NSM laminate strips of carbon fiber reinforced polymer (CFRP).

TL;DR: In this paper, a finite element formulation for active vibration control of thin plate laminated structures with integrated piezoelectric layers acting as sensors and actuators is presented, based on the Kirchhoff classical laminated theory.

TL;DR: In this paper, a finite element computation procedure is set up for the shape finding analysis of cable-stayed bridges at different erection stages during construction using the cantilever method and two computational processes are established, one is a forward process analysis and the other is a backward process analysis.

TL;DR: In this paper, a method of locating and quantifying the damage in structural members using the concept of residual forces is proposed, where the damage parameters are determined by minimising a global error derived from dynamic residual vectors, which are obtained by introducing a simulated “experimental” data into the eigenproblem.

TL;DR: In this article, the dynamic behavior analysis of bridges under trains running at high-speed was studied and the results showed that train-bridge interaction effects related to the dynamic response of the bridge appeared to be significant at every speed.

TL;DR: In this article, two 4-node quadrilateral membrane elements, denoted as AGQ6-I and AGQ 6-II, have been developed and several generalized conforming conditions were introduced to determine all unknown parameters.

TL;DR: In this article, a methodological approach of wide generality for assessing the reliability of reinforced and prestressed concrete structures is presented, in which the model is not defined through a set of fixed values, but through bands of values, bounded between suitable minimum and maximum extremes.

TL;DR: In this paper, the formulation and implementation of coupling between a micro-mechanical homogenization model and an isotropic damage model for the masonry components is addressed.

TL;DR: In this paper, a topology optimization technique for systematically designing contact-aided compliant mechanisms (CCM) is presented, which uses a smooth approximation of the unilateral displacement constraints that are used to model contact interactions.

TL;DR: In this paper, the shooting, Newton and p-version, hierarchical finite element methods are applied to study geometrically non-linear periodic vibrations of elastic and isotropic, beams and plates.

TL;DR: In this paper, a radial basis function (RBF) neural network is proposed for nonlinear mapping and its higher training speed to evaluate the interference effects among adjacent buildings under wind action.

TL;DR: In this article, an optimization study is presented to minimize the vibrational energy (VE) of vibrating beams with passive constrained layer damping (PCLD) treatment, with the objective of minimizing the integrated global VE of the base beam over a frequency range of interest.

TL;DR: In this article, the feasibility, potential, and limitations of using high fidelity electromechanical simulation for the reliability-based analysis and design optimization of electrostatically actuated Micro-ElectroMechanical Systems (MEMS) are investigated.

TL;DR: In this paper, the incremental finite element method using linear Timoshenko beam elements is formulated by the total Lagrangian approach for the superelastic, large deformation analysis of SMA helical springs.