scholarly journals Review on the Impact of Elements Used During Bridge Construction

2021 ◽  
pp. 19-22
Author(s):  
Nikhil Kumar Singh ◽  
Jyoti Yadav
Keyword(s):  
High Strength ◽  
Dynamic Effects ◽  
Earthquake Loads ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Long Span Bridge ◽  
Cable Stays ◽  
The Impact ◽  
Innovative Techniques ◽  
Cable Stayed Bridges

The requirement of long span bridge is increase with development of infrastructure facility in every nation. Long span bridge could be achieved with use of high strength materials and innovative techniques for analysis of bridge. Generally, cable-supported bridges comprise both suspension and cable-stayed bridges. Cable-supported bridges are very flexible in behavior. These flexible systems are susceptible to the dynamic effects of wind and earthquake loads. The cable-stayed bridge could provide more rigidity due to the presence of tensed cable stays as a force resistance element.

scholarly journals Calculated research of aeroelastic stability of a bridge over the river Ob in Salekhard at the stage of assembling and operation

2019 ◽  
Vol 6 (3) ◽  
Author(s):  
Anastasiya Shustikova ◽  
Andrei Kozichev ◽  
Sergei Paryshev ◽  
Konstantin Strelkov
Keyword(s):  
Cfd Simulation ◽  
Load Capacity ◽  
Air Flow ◽  
Lift Coefficient ◽  
High Strength ◽  
Railway Bridge ◽  
Aeroelastic Stability ◽  
Ansys Fluent ◽  
Long Span ◽  
Long Span Bridge

Recently, long span bridge construction has been demanded for development of the regions of the Russian Federation. In terms of economy, it’s useful to build a combined road-railway bridge. Such bridges, generally, constitute a metal cross-cutting girder with carriageways on lower, upper or both zones of the girder. The major advantages of combined bridges are high strength and load capacity, plus cross-cutting to wind load. Focus of this research is a combined road-railway bridge over the Ob river at the stage of assembling and operation. The purpose of the study was to determine the limits of aeroelastic stability of combined road-railway bridge at the stage of assembling and operation using numerical simulation. To better understand the bridges behaviour in air flow, flow around a section model has been researched with CFD simulation in the ANSYS FLUENT. Then based on the given results of the calculations the dependence of the bridge vibrations on wind speed within a specified range is obtained, and also values of drag coefficient Сх, lift coefficient Су and torque coefficient Мz are received. These studies were carried out in the range of angles of attack α = ±3°. The possibility of divergence and galloping was also estimated. The results of the study made it possible to estimate the influence of air flow on combined bridge cross-cutting girder. Overall, the conducted research seems promising for further investigation and development in the field of bridge aeroelasticity.

Fire of steel and composite beam bridges

2019 ◽  
Author(s):  
Henryk Zobel ◽  
Wojciech Karwowski ◽  
Agnieszka Golubińska ◽  
Thakaa Al-Khafaji
Keyword(s):  
Fire Resistance ◽  
Composite Beam ◽  
Structural Integrity ◽  
Bridge Structure ◽  
Long Span ◽  
Long Span Bridge ◽  
Bridge Structures ◽  
Fire Scenarios ◽  
Design Construction ◽  
Cable Stayed Bridges

<p>The problem of bridge fires is growing. Because of a bad experience in Poland, it was decided to improve fire resistance of long span bridge structures, and of cable-stayed bridges in particular. Statistics shows that fire is a real threat to this kind of structure. They also confirm that the worst results of fire are for those with an orthotropic deck rather than with a concrete one. The basic problems to solve are how to predict fire resistance of a particular bridge and how to ensure safety and structural integrity of the bridge structure. Taking into account the fact that bridge standards do not include information relating to fire protection, and fire standards do not determine rules for design, construction and maintenance of such structures, there are no regulations for this problem. Fire scenarios are devoted to buildings, but the thermo-structural behavior of bridges is different.</p>

Mechanical Features of Cable-Girder Anchorage for Long-Span Railway Cable-Stayed Bridge with Steel Box Girders

2014 ◽  
Vol 587-589 ◽  
pp. 1391-1394 ◽  
Author(s):  
Chao Yi Yao ◽  
Qian Hui Pu ◽  
Ya Dong Yao
Keyword(s):  
Stress Distribution ◽  
Rational Design ◽  
Load Transfer ◽  
Rapid Development ◽  
Transfer Mechanism ◽  
Complex Load ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Load Transfer Mechanism ◽  
Cable Stayed Bridges

The cable-stayed bridge got rapid development in recent years. And for long-span cable-stayed bridges, the cable-girder anchorage structure is a key component in designing. The function of the cable-girder anchorage structure is to transfer the load between cables and the main girder. With the complex load transfer mechanism and stress concentration induced by large cable force, rational design of cable-girder anchorage structure is critical to long-span cable-stayed bridges. Take a certain long-span railway cable-stayed bridge in Zhejiang Province as the investigation, the load transfer mechanism and the stress distribution state was studied by finite element model. The research indicated that the design of this anchor box was rational. The stress distribution on each plate of the anchor box was relatively uniform. And the load transfer path and mechanisms of the main components of this anchor box were clear.

Monitored structural behavior of a long span cable-stayed bridge under environmental effects

2018 ◽  
Vol 4 (4) ◽  
pp. 137 ◽  
Author(s):  
Alemdar Bayraktar ◽  
Ashraf Ashour ◽  
Halil Karadeniz ◽  
Altok Kurşun ◽  
Arif Erdiş
Keyword(s):  
Air Temperature ◽  
Environmental Effects ◽  
Monitoring Data ◽  
Structural Behavior ◽  
Steel Cable ◽  
Daily Monitoring ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Cable Forces ◽  
Cable Stayed Bridges

An accurate numerical analysis of the behavior of long-span cable-stayed bridges under environmental effects is a challenge because of complex, uncertain and varying environmental meteorology. This study aims to investigate in-situ experimental structural behavior of long-span steel cable-stayed bridges under environmental effects such as air temperature and wind using the monitoring data. Nissibi cable-stayed bridge with total length of 610m constructed in the city of Adıyaman, Turkey, in 2015 is chosen for this purpose. Structural behaviors of the main structural elements including deck, towers (pylons) and cables of the selected long span cable-stayed bridge under environmental effects such as air temperature and wind are investigated by using daily monitoring data. The daily variations of cable forces, cable accelerations, pylon accelerations and deck accelerations with air temperature and wind speed are compared using the hottest summer (July 31, 2015) and the coldest winter (January 1, 2016) days data.

The Analysis of Stayed Cable Wind-Induced Vibration Morphology and Damping Measures

2014 ◽  
Vol 501-504 ◽  
pp. 1174-1177
Author(s):  
Xiao Ming Du ◽  
Nan Li
Keyword(s):  
Time Effect ◽  
Stay Cable ◽  
Main Bearing ◽  
Cable Vibration ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Stay Cables ◽  
Long Span Bridge ◽  
Long Time ◽  
Wind Induced Vibration

The stayed cable is the key part of the cable-stayed bridge and the main bearing section. Stay cables are prone to vibration under the loads of the rains winds, earthquakes and transportation for the long-span bridge is very flexible and the damping is small. A long time effect of cable vibration on the structure durability has become a serious problem of cable-stayed bridge in the development and operation. Wind induced vibration of stay cable shape is analyzed, and some common damping measures are expounded in the article and it provides the basis for further study in the future.

Analysis of Pylon Anchorage Zone of Cable-Stayed Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1125-1128
Author(s):  
Liang Liang Zhai
Keyword(s):  
Type Structure ◽  
Construction Technology ◽  
Analysis Method ◽  
Finite Element Program ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Element Program ◽  
Force Characteristics ◽  
Major General ◽  
Cable Stayed Bridges

For long-span cable-stayed bridge, the stress of pylon anchorage zone is complex. For the construction technology personnel, the research on the force characteristics of anchorage zone can offer a theoretical base to organize construction better. This paper makes a further study for the stress of tower anchorage zone of two cable-stayed bridges with different anchor forms by using major general finite element program ANSYS to analysis the force characteristics of anchorage zone in detail. The results provide a reference for construct and design the same type structure. The analysis method for same type structure is also worth learning.

Behavior of Super Long Span Cable-Stayed Bridges during the Construction

2011 ◽  
Vol 63-64 ◽  
pp. 474-477
Author(s):  
Peng Liang ◽  
Zhong Ping Qin ◽  
Guo Xing Wang
Keyword(s):  
Temporal Variation ◽  
Nonlinear Analysis ◽  
Spatial And Temporal Variation ◽  
Geometrically Nonlinear ◽  
Construction Process ◽  
Geometrically Nonlinear Analysis ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Cable Stayed Bridges

In order to accurately reflect the effects and the spatial and temporal variation of long span cable-stayed bridge during the construction process, this paper, based on total CR formulation and the catenary cable element, improves the existing methods of geometrically nonlinear analysis and then develops a new software for nonlinear analysis of bridge through the entire construction.

Seismic Displacements Reduction for a Long-Span Cable-Stayed Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 840-845
Author(s):  
Xi Wen Yang ◽  
Zi Bao Lian
Keyword(s):  
Inertial Force ◽  
Center Of Gravity ◽  
Shear Forces ◽  
Viscous Dampers ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Seismic Shear ◽  
Seismic Displacements ◽  
Floating Systems ◽  
Cable Stayed Bridges

Floating or semi-floating systems are usually employed for long-span cable-stayed bridges to lengthen their fundamental periods, and accordingly, to reduce their seismic inertial force, but the structures’ seismic displacements could be increased by utilizing these systems. Taking Yong-jiang railway cable-stayed bridge which has a low center of gravity as engineering background, the function of viscous dampers in controlling seismic displacements is studied. Firstly, the rational parameters of dampers are determined by parametric analysis, and then the seismic displacements and forces of the bridge, utilizing and un-utilizing viscous dampers, are compared. The results show that: viscous dampers are efficient in controlling seismic displacements of the bridge; the seismic shear forces at the bottom of towers are reduced slightly and the corresponding moments are reduced in a larger extent for cable-stayed bridge with low center of gravity.

scholarly journals Applicability of Partially Anchored Cable-Stayed Bridge to Long-Span Bridge.

1995 ◽  
pp. 113-124
Author(s):  
Suguru Kaneko ◽  
Takeshi Nakayama ◽  
Tathuo Mukoyama ◽  
Tathushi Iwaki ◽  
Saeko Takekawa
Keyword(s):  
Cable Stayed Bridge ◽  
Long Span ◽  
Long Span Bridge
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