Torsional vibrations in boxgirder suspension bridges

1974 ◽  
Vol 3 (2) ◽  
pp. 203-213 ◽  
Author(s):  
Max Irvine
Keyword(s):  
Suspension Bridges ◽  
Torsional Vibrations

Free Torsional Vibrations of Suspension Bridges

1979 ◽  
Vol 105 (4) ◽  
pp. 767-788
Author(s):  
Ahmed M. Abdel-Ghaffar
Keyword(s):  
Suspension Bridges ◽  
Torsional Vibrations

scholarly journals DESIGNING THE SPAN OF A HANGING BRIDGE BY METHODS OF SYSTEM ANALYSIS

2020 ◽  
pp. 65-70
Author(s):  
S. A. Khitruk ◽  
V. T. Chemodurov ◽  
O.A. Kuzmenko
Keyword(s):  
Cross Section ◽  
System Analysis ◽  
Air Flow ◽  
Moment Of Inertia ◽  
Total Weight ◽  
Suspension Bridges ◽  
Torsional Vibrations ◽  
Bridge Span ◽  
The Stability ◽  
Positive Quality

As you know, suspension bridges are much lighter in their total weight than bridges of other structures. This is their undoubted positive quality. It is no accident that this type of bridge is widely used in practice. However, along with the undeniable advantages, this type of bridge is quite sensitive to wind loads, which are a generator of bending and torsional vibrations of spans at certain speeds of transverse air flow. If the drag of the bridge with a transverse air flow can be easily reduced by designing streamlined surfaces, then ensuring the stability of the bridge span surface for bending and torsion can only be ensured by properly selecting the profile of its cross-section, which provides the necessary moment of inertia, as necessary components of its rigidity.

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.

Probabilistic Estimation of Safety Factors for Suspension Bridges

2004 ◽  
Vol 88 (8) ◽  
pp. 88-93
Author(s):  
Elena Dragomirescu ◽  
Toshio Miyata ◽  
Hitoshi Yamada ◽  
Hiroshi Katsuchi
Keyword(s):  
Suspension Bridges ◽  
Safety Factors ◽  
Probabilistic Estimation

Health monitoring of suspension bridges by global position system

2001 ◽  
Vol 84 (5) ◽  
pp. 8-15
Author(s):  
Liang Xu ◽  
Jingjun Guo ◽  
Jianjing Jiang
Keyword(s):  
Global Position System ◽  
Health Monitoring ◽  
Position System ◽  
Suspension Bridges
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