PARAMETRIC STUDY OF CABLE STAYED BRIDGE USING DIFFERENT PYLON CONFIGUARTION

Cable stayed bridge are the most flexible bridge and getting popularity because of its economy for longer spans. Cable stayed bridges have good stability, optimum use of structural materials, aesthetic, low design and maintenance costs, and efficient structural characteristics. Therefore, this type of bridges are given preference for long span crossings compared to suspension bridges. A study is carried out to find the dynamic effect on different configuration of pylons of a cable stayed bridge. A pylon is inclined at 5o , 10o , 15o , 20o , 25o and 30o with vertical and horizontal axis both and compared with vertical pylon to study the dynamic response of bridge. The 3D bridge models are prepared on CSI BRIDGE software and bridge is analyzed seismically by Imperial Valley 1947, Earthquake. The bridge response in terms of Pylon, Girder and Cable axial force, moment and torsion is obtained. The study reveals that the different angle of the pylon has great influence in the seismic response of cable stayed bridge. We are getting minimum axial force at 10o in cable at main span, girder at main span and pylon.

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Static and Dynamic Structural Characteristics and Economical Efficiency of Ultra Long-Span Cable-Stayed Suspension Bridges.

Doboku Gakkai Ronbunshu ◽

10.2208/jscej.2002.707_177 ◽

2002 ◽

pp. 177-194

Author(s):

Ken-ichi MAEDA ◽

Hitoshi NAKAMURA ◽

Kunikatsu NOMURA ◽

Nobuyuki NARITA

Keyword(s):

Structural Characteristics ◽

Suspension Bridges ◽

Economical Efficiency ◽

Long Span

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Analysis of Dynamic Characteristics of Pile-Soil Coupling Effect in Consideration of Large Span Cable-Stayed Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.501-504.1270 ◽

2014 ◽

Vol 501-504 ◽

pp. 1270-1273

Author(s):

Wen Yuan Chen

Keyword(s):

Axial Force ◽

Soil Structure ◽

Coupling Effect ◽

Reaction Force ◽

Bending Moment ◽

Internal Force ◽

Cable Stayed Bridge ◽

Long Span ◽

Pile Cap ◽

Force Calculation

Using the viscouselastic artificial boundary, three conditions of long-span cable-stayed bridge are analyzed,such as pile cap consolidation, pile - structure and pile soil structure interaction. Natural frequency of bridge of pile - soil - structure coupling becomes small and cycle becomes long. The pile bottom reaction force decreased obviously, at the same time, the axial force , bending moment, axial force of cable, tower of axial force and bending moment is also reduced significantly. Cable-stayed bridge is a special flexible structure, so, static internal force calculation in the tower bottom consolidation pattern is safe, but the value is too large.

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Impact Analysis of Tower Number on Automotive Live Load Effect in Suspension Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1020.124 ◽

2014 ◽

Vol 1020 ◽

pp. 124-129

Author(s):

Zhi Gang Qi ◽

Jun Dong ◽

Bo Qiang Yao

Keyword(s):

Mechanical Properties ◽

Impact Analysis ◽

Suspension Bridge ◽

Suspension Bridges ◽

Load Effect ◽

Bridge Programs ◽

Long Span ◽

The Difference ◽

Main Girder ◽

Bridge Models

As a bridge with a large span, suspension bridge has obvious advantage in the current cross-sea engineering. In order to achieve longer span capacity, long-span multi-tower suspension bridge programs were repeatedly proposed. Due to the increase in the number of tower, the mechanical behavior would be inevitably different with the ordinary two-tower suspension bridge. For better grasp the difference of the mechanical properties, Midas civil 2011 is used to model to analyze. Suspension bridge models whose spans are 1080m with different towers (two, three, four, five, six,) are established to analyze the change in the mechanical properties under the action of vehicle load. The results show that the mechanical properties of multi-tower suspension bridge are quietly different from two-tower suspension bridge and with the increase in the number of bridge tower, the displacements of main girder and main tower have large difference. When the number of tower is more than or equal to four, multi-tower suspension bridges have little difference in the mechanical properties and that means multi-tower effect is not obvious.

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Study on Seismic Response and Countermeasures of Long Span Cable-Stayed Bridge under Long Period Ground Motion

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.3841 ◽

2011 ◽

Vol 71-78 ◽

pp. 3841-3844

Author(s):

Guo Hui Zhao ◽

Wen Hua Zhang ◽

Jian Hui Zhao

Keyword(s):

Seismic Response ◽

Ground Motion ◽

Ground Motions ◽

Great Influence ◽

Viscous Dampers ◽

Fluid Viscous Dampers ◽

Long Period ◽

Cable Stayed Bridge ◽

Long Span ◽

Long Period Ground Motion

Long period ground motion has great influence on long period structures such as large oil tank, high-rise building and long span bridge. In this paper, a long span cable-stayed bridge is taken as an example to study the seismic response of long period structure under long period ground motions and conventional ground motions by using nonlinear dynamic time history method. It is shown that although the peak acceleration of the long period ground motions are no more than half of conventional ground motions, the displacement and force response of the bridge at key points under long period ground motions are much greater than that of conventional ground motions. Constraint cables and fluid viscous dampers are used to reduce in the influence of long period ground motion of the bridge, and the effects of the two countermeasures are also analyzed in this paper. The results show that constraint cables have unstable effect and even negative effect under long period ground motion. While fluid viscous dampers have stable effect under both long period ground motion and conventional ground motion with proper damping parameters.

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Analysis of the behaviour of Cable stayed bridge with different types of Pylon

E3S Web of Conferences ◽

10.1051/e3sconf/202130402006 ◽

2021 ◽

Vol 304 ◽

pp. 02006

Author(s):

Priyanka Singh ◽

Mirza Jahangir Baig ◽

Bhumika Pandey ◽

Kartik Papreja

Keyword(s):

Structural Design ◽

Shear Force ◽

Structural Characteristics ◽

Bending Moment ◽

Suspension Bridges ◽

Maintenance Costs ◽

Cable Stayed Bridge ◽

Different Types ◽

Efficient Type ◽

Cable Stayed Bridges

Cable stayed bridges are known for their good stability, It has been the most favorable use of structural design, for comparatively low designing and maintenance costs, and for effective structural characteristics. Therefore, this type of bridges are gaining popularity and are generally selected for long spans when compared to suspension bridges. A cable stayed bridge comprises of pylons with cables withstanding the weight of deck. There are different types of pylons i.e. ; H-type pylon, A-type pylon, inverted Y-type pylon, and diamond shaped pylon. In this paper the bridge design, model, and analyses for these different types of pylons is done using STAAD Pro. The comparison for three cases are done on the basis of shear force and bending moment in terms of self weight to obtain the most efficient type of pylon design. The results thus obtained are useful in limiting the drawbacks of other types of pylon.

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Control of Vibrations due to Moving Loads on Suspension Bridges

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2006.11.3.14749 ◽

2006 ◽

Vol 11 (3) ◽

pp. 293-318 ◽

Cited By ~ 4

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.

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