COMMENTS ON “DYNAMIC BEHAVIOR OF BEAMS AND RECTANGULAR PLATES UNDER MOVING LOADS”

1997 ◽  
Vol 200 (5) ◽  
pp. 721-728 ◽  
Author(s):  
Y.-H. Lin
Keyword(s):  
Dynamic Behavior ◽  
Rectangular Plates ◽  
Moving Loads

scholarly journals Dynamic Behavior of Tied-Arch Bridges under the Action of Moving Loads

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Paolo Lonetti ◽  
Arturo Pascuzzo ◽  
Alessandro Davanzo
Keyword(s):  
Dynamic Behavior ◽  
Structural Characteristics ◽  
Moving Load ◽  
Sensitivity Analyses ◽  
Impact Factors ◽  
Moving Loads ◽  
Centripetal Acceleration ◽  
Design Variables ◽  
Dynamic Amplification ◽  
Arch Bridges

The dynamic behavior of tied-arch bridges under the action of moving load is investigated. The main aim of the paper is to quantify, numerically, dynamic amplification factors of typical kinematic and stress design variables by means of a parametric study developed in terms of the structural characteristics of the bridge and moving loads. The basic formulation is developed by using a finite element approach, in which refined schematization is adopted to analyze the interaction between the bridge structure and moving loads. Moreover, in order to evaluate, numerically, the influence of coupling effects between bridge deformations and moving loads, the analysis focuses attention on usually neglected nonstandard terms in the inertial forces concerning both centripetal acceleration and Coriolis acceleration. Sensitivity analyses are proposed in terms of dynamic impact factors, in which the effects produced by the external mass of the moving system on the dynamic bridge behavior are evaluated.

Dynamic analysis of rectangular plates crossed by distributed moving loads

2017 ◽  
Vol 23 (9) ◽  
pp. 1291-1302 ◽  
Author(s):  
S Sorrentino ◽  
G Catania
Keyword(s):  
Coupling Effect ◽  
Ritz Method ◽  
Flexural Vibration ◽  
Analytical Form ◽  
Relative Magnitude ◽  
Transverse Displacement ◽  
Rectangular Plates ◽  
Moving Loads ◽  
Railway Bridges ◽  
Parallel Direction

This study investigates the dynamic behaviour of plates crossed by distributed moving gravitational and inertial loads, in the case in which the relative magnitude of the moving mass introduces a coupling effect with the structure, with possible applications to the vibration analysis of railway bridges. A rectangular Kirchhoff plate is considered, simply supported on two opposite edges and free on the other two edges, loaded by a partially distributed mass travelling in the parallel direction with respect to the free edges. The formulation includes damping, and it is accomplished by the Rayleigh–Ritz method, expressing the solution in semi-analytical form. The shape functions for describing the transverse displacement field of the plate are selected as tensor products of linearly independent eigenfunctions of homogeneous uniform beams in flexural vibration, yielding a low-order model with time-dependent coefficients. Numerical examples are then presented and discussed, aimed at investigating the effects of each of the model governing parameters.

Dynamic Behavior of Continuous Beams with Moving Loads

1981 ◽  
Vol 107 (1) ◽  
pp. 229-246
Author(s):  
Toshiro Hayashikawa ◽  
Noboru Watanabe
Keyword(s):  
Dynamic Behavior ◽  
Moving Loads ◽  
Continuous Beams

A Simplified Numerical Model for the Assessment of Vibration in Subway Lines with Experimental Validation

2021 ◽  
pp. 2150156
Author(s):  
Danilo Pereira dos Santos ◽  
Gustavo de Miranda Saleme Gidrão ◽  
Ricardo Carrazedo
Keyword(s):  
Experimental Data ◽  
Dynamic Behavior ◽  
Industrial Revolution ◽  
Numerical Models ◽  
Propagation Model ◽  
Moving Loads ◽  
Robust Solution ◽  
Computational Costs ◽  
The Coefficient Of Friction ◽  
The 19Th Century

The first studies on the dynamic behavior of railway lines go back to the 19th century, after the industrial revolution. Since then, numerous analytical solutions and numerical models have been developed toward understanding the dynamic response of moving loads. However, proposals that reproduce the vibrational behavior of subway lines remain challenging due to the complexity and number of variables involved. This paper presents two simplified numerical models built and validated with experimental data to simulate the subway dynamic behavior. The first simulated the vibration generation, whereas the other simulated the propagation throughout the soil. Analyses were conducted from 1/3 octave bands spectra, as in practice. The models showed the coefficient of friction of the wheel/rail contact does not impact the global level vibration significantly, and an estimation of this parameter (0.3) enabled an analysis of the attenuation conditions for the floating slab track (FST) system. The study of attenuations revealed FST stiffness changes are a more robust solution than changes in its mass. The wave soil propagation model has proved adequate in comparison to classic solutions, and a strategy for the estimate of error associated with two-dimensional (2D) simplifications is proposed. Despite the simplicity of the models, the numerical simulations fit the experimental data well, supporting simplified models that study subways, and promoting more vibration control evaluations at lower computational costs.

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