Compressive sampling based approach for identification of moving loads distribution on cable-stayed bridges

2013 ◽  
Author(s):  
Yuequan Bao ◽  
Hui Li ◽  
Fujian Zhang ◽  
Jinping Ou
Keyword(s):  
Compressive Sampling ◽  
Moving Loads ◽  
Cable Stayed Bridges

scholarly journals Dynamic Analysis of Cable-Stayed Bridges Affected by Accidental Failure Mechanisms under Moving Loads

2013 ◽  
Vol 2013 ◽  
pp. 1-20 ◽  
Author(s):  
Fabrizio Greco ◽  
Paolo Lonetti ◽  
Arturo Pascuzzo
Keyword(s):  
Failure Mode ◽  
Structural Characteristics ◽  
Sensitivity Analyses ◽  
Moving Loads ◽  
Cable System ◽  
System Sensitivity ◽  
Design Variables ◽  
Mode Characteristics ◽  
Dynamic Amplification ◽  
Cable Stayed Bridges

The dynamic behavior of cable-stayed bridges subjected to moving loads and affected by an accidental failure in the cable suspension system is investigated. The main aim of the paper is to quantify, numerically, the 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 components. The bridge formulation is developed by using a geometric nonlinear formulation, in which the effects of local vibrations of the stays and of large displacements in the girder and the pylons are taken into account. Explicit time dependent damage laws, reproducing the failure mechanism in the cable system, are considered to investigate the influence of the failure mode characteristics on the dynamic bridge behavior. The analysis focuses attention on the influence of the inertial characteristics of the moving loads, by accounting coupling effects arising from the interaction between girder and moving system. Sensitivity analyses of typical design bridge variables are proposed. In particular, the effects produced by the moving system characteristics, the tower typologies, and the failure mode characteristics involved in the cable system are investigated by means of comparisons between damaged and undamaged bridge configurations.

Dynamic behaviour of under-deck cable-stayed bridges under the action of moving loads

2014 ◽  
Vol 102 (20) ◽  
pp. 1528-1535 ◽  
Author(s):  
Fernando Madrazo-Aguirre ◽  
Ana M Ruiz-Teran ◽  
M Ahmer Wadee
Keyword(s):  
Dynamic Behaviour ◽  
Moving Loads ◽  
Cable Stayed Bridges

scholarly journals Dynamic behaviour of steel–concrete composite under-deck cable-stayed bridges under the action of moving loads

2015 ◽  
Vol 103 ◽  
pp. 260-274 ◽  
Author(s):  
Fernando Madrazo-Aguirre ◽  
Ana M. Ruiz-Teran ◽  
M. Ahmer Wadee
Keyword(s):  
Dynamic Behaviour ◽  
Moving Loads ◽  
Cable Stayed Bridges

scholarly journals Behavior of Asymmetric Cable Stayed Bridge for Long Span

2020 ◽  
Vol 9 (7) ◽  
pp. 600-605
Keyword(s):  
Analytical Investigation ◽  
Traffic Load ◽  
Bridge Structure ◽  
Bending Moments ◽  
Moving Loads ◽  
Modern Times ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Analysis Process ◽  
Cable Stayed Bridges

In the recent years cable stayed bridges have received more attention than any other bridges. As one of the most competitive bridge in modern times, the cable stayed bridge is ideally suitable for long span. Asymmetric cable stayed bridges are the upgrade of conventional cable stayed bridges. Analytical investigation is an important in the study of asymmetric cable stayed bridge. The response of the bridge deck under moving traffic load is very important in the analysis process. Even the slightest deflection may result in the collapse of the bridge structure. Recent reports states that the cable stayed bridges are subjected to wave like vibrations when subjected to moving loads. So the bridge must be analyzed in such a way that its deflections are well under the permissible limits. The parameters like displacements, shear forces, bending moments and percentage of reinforcements were studied in long span asymmetric cable stayed bridge. The asymmetric cable bridge was modeled using SAP2000 software.

Control of Vibrations due to Moving Loads on Suspension Bridges

2006 ◽  
Vol 11 (3) ◽  
pp. 293-318 ◽  
Author(s):  
M. Zribi ◽  
N. B. Almutairi ◽  
M. Abdel-Rohman
Keyword(s):  
Bridge Deck ◽  
Suspension Bridge ◽  
Lyapunov Theory ◽  
Dynamic Responses ◽  
Suspension Bridges ◽  
Control Force ◽  
Moving Loads ◽  
Hydraulic Actuator ◽  
Long Span ◽  
Suspended Cables

The flexibility and low damping of the long span suspended cables in suspension bridges makes them prone to vibrations due to wind and moving loads which affect the dynamic responses of the suspended cables and the bridge deck. This paper investigates the control of vibrations of a suspension bridge due to a vertical load moving on the bridge deck with a constant speed. A vertical cable between the bridge deck and the suspended cables is used to install a hydraulic actuator able to generate an active control force on the bridge deck. Two control schemes are proposed to generate the control force needed to reduce the vertical vibrations in the suspended cables and in the bridge deck. The proposed controllers, whose design is based on Lyapunov theory, guarantee the asymptotic stability of the system. The MATLAB software is used to simulate the performance of the controlled system. The simulation results indicate that the proposed controllers work well. In addition, the performance of the system with the proposed controllers is compared to the performance of the system controlled with a velocity feedback controller.

A Comparative Aerodynamic Analysis of Two Cable-Stayed Bridges Built in Poland

2002 ◽  
Vol 29 (3-4) ◽  
pp. 14
Author(s):  
Andrzej Flaga ◽  
J. Podgorski ◽  
E. Blazik-Borowa ◽  
Jaroslaw Bec ◽  
G. Bosak
Keyword(s):  
Aerodynamic Analysis ◽  
Cable Stayed Bridges
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