Showing papers in "Engineering Structures in 2001"

TL;DR: In this paper, the authors present a closed-form solution for debonding failure of reinforced concrete (RC) beams, which is intended for application to beams made of all kinds of materials bonded with a thin plate and numerical comparison between the existing solutions and the present new solution enable a clear appreciation of the effects of various parameters.

TL;DR: In this article, the validity and applicability of this technique are assessed by comparison with "dynamic pushover" idealised envelopes obtained from incremental dynamic collapse analysis using natural and artificial earthquake records imposed on 12 RC buildings of different characteristics.

TL;DR: In this paper, a general agreement among researchers and professionals that future seismic design practice will be based on explicit performance criteria that can be quantified, considering multiple performance and hazard levels.

TL;DR: In this paper, a neural network is used to locate and classify faults and a number of different methods are applied to determine an optimal (or near-optimal) sensor distribution.

TL;DR: In this article, a method is presented to predict the complete stress-strain curve of concrete subjected to triaxial compressive stresses caused by axial load plus lateral pressure due to the confinement action in circular, box and octagonal shaped concrete-filled steel tubes.

TL;DR: In this paper, the authors describe models for the wind velocity time-histories of transient tornado and microburst events and the resulting loading on a lattice tower, predicting a tornado induced shear failure, as observed in the field.

TL;DR: In this paper, an elementary theoretical model of a bridge was investigated using the integral transformation method which provides an estimation of the amplitudes of the free vibration in addition, the analysis gives the critical speeds at which the resonance vibration may occur.

TL;DR: In this paper, the authors describe numerically the interdependency between several seismic acceleration parameters and diverse structural damage indices, including Park/Ang overall structural damage index (OSDI), the maximum interstory drift (ISD), and the maximum floor acceleration.

TL;DR: In this article, a structural damage identification algorithm using static test data and changes in natural frequencies is presented, where the effect of damage severity can be eliminated effectively as the result that the first-order approximation of changes in static deformation and natural frequencies are employed jointly in the damage signatures.

TL;DR: In this paper, a versatile element that is capable of treating various vehicle-bridge interaction (VBI) effects is derived, which can deal with vehicle models of various complexities, ranging from the moving load, moving mass, sprung mass, to suspended rigid bar, and so on.

TL;DR: In this paper, different semi-active algorithms based on the clipped-optimal and fuzzy control strategies are studied using numerical examples and the main objective of this paper is to study the effectiveness of different control algorithms for semiactive tuned liquid dampers for structural control applications.

TL;DR: In this article, the control effectiveness of a semi-active tuned mass damper with variable damping under harmonic excitation is studied. And an optimal control law governing the variation of damping of the damper is derived using the optimal control theory.

TL;DR: Numerical experiments indicate that the DSC is a simple and reliable algorithm for beam analysis.

TL;DR: In this paper, a new element called bridge-track-vehicle element is proposed for investigating the interactions among a moving train and its supporting railway track structure and bridge structure, where the moving train is modelled as a series of two-degree-of-freedom mass-spring-damper systems at the axle locations.

TL;DR: In this article, a new theoretical approach is presented which is valid for both square and rectangular slabs and conforms to the mode of behaviour observed in tests, and a prediction for ultimate collapse of the slab due to fracture of the reinforcement is also presented.

TL;DR: In this paper, the effect of distributing the steel bracing over the height of the reinforced concrete (RC) frame on the seismic performance of a low-rise nonductile reinforced concrete building was investigated.

TL;DR: In this article, the differences between human induced loading on a floor with that generated whilst ascending or descending a staircase were investigated, and conclusions were drawn as to what differences between the two should warrant concern by the staircase designers.

TL;DR: In this article, a method is proposed to estimate the joint damages of a steel structure from modal data using a neural networks technique, where the beam-to-column connection is represented by a zero-length rotational spring at the end of the beam element, and the joint fixity factor is defined from the rotational stiffness.

TL;DR: In this paper, a numerical analysis based on the Dynamic Relaxation (DR) method is developed which caters specifically for the form-finding and load analysis of this type of structure; a particular feature of the analysis is that bending components are treated in a finite difference form with three degrees of freedom per node rather than six.

TL;DR: In this article, the generalized nonstationary Kanai-tajimi model is used to describe and simulate the ground motion time histories of the Iranian earthquakes Naghan (1977), Tabas (1978), and Manjil (1990).

TL;DR: In this article, the performance of a uniformly and linearly distributed multiple mass dampers was evaluated for both configurations for harmonic excitation and structural vibration decay in both cases for the El Centro earthquake simulation.

TL;DR: In this article, two general formulations of one-dimensional structural members with deformable interfaces are presented, and a special force recovery procedure based on residual deformations is presented for the force-based formulation, which accounts for the bond-slip between the element components.

TL;DR: In this paper, the authors established the differences between the Mindlin and Reissner plate theories by deriving bending relationships between the two theories for a general plate problem and specialized them for the cases of rectangular plates with (1) all sides simply supported, (2) two opposite edges simply supported with the other two edges free.

TL;DR: In this article, the static, dynamic and long-term tests of bridges in situ have been performed in the Czech and Slovak Republics since 1968, and the standard methods are supplemented with the criteria for the elastic and permanent deformations, natural frequencies and the dynamic impact factors.

TL;DR: In this paper, the experimental results from two methods of plate attachment, namely adhesive bonding and bolting, are examined and compared and a method of analysis, based on the equilibrium of forces along the critical section, is proposed.

TL;DR: In this article, the effect of general corrosion on the modal parameters of reinforced concrete beams was studied and the results showed that the trend in measured natural frequencies was sensitive to the deterioration state of the beams and the changes were inconsistent with the changes in natural frequencies, but a trend was observed which was rather mode dependent.

TL;DR: In this paper, a new design method of three-dimensional frames using practical advanced analysis is presented, in which separate member capacity checks encompassed by the code specifications are not required, because the stability of separate members and the structure as a whole can be rigorously treated in determining the maximum strength of the structures.

TL;DR: In this paper, a finite element model with three-dimensional solid elements was established to investigate the bearing failure of cold-formed steel bolted connections under shear, and three distinctive failure modes were successfully modelled: bearing failure, shear out failure, and net-section failure.

TL;DR: In this paper, the authors focused on the benchmark problem application regarding the vibration control of tall buildings under along wind excitation, where the adopted control scheme consists of an Active Tuned Mass Damper (ATMD) where the control action is achieved by a Fuzzy Logic Controller (FLC).

TL;DR: In this paper, the authors apply the auto-regressive time series modelling approach to produce spectral estimates of two such problems, i.e., non-stationary data obtained from the large amplitude response of a cable stayed bridge to wind excitation and non-linear data from modal testing of cracked reinforced concrete beams.