scholarly journals Pseudo-Static Analysis on the Shifting-Girder Process of the Novel Rail-Cable-Shifting-Girder Technique for the Long Span Suspension Bridge

2019 ◽  
Vol 9 (23) ◽  
pp. 5158
Author(s):  
Quan Pan ◽  
Zhuangpeng Yi ◽  
Donghuang Yan ◽  
Hongsheng Xu
Keyword(s):  
Static Analysis ◽  
Suspension Bridge ◽  
Theoretical Method ◽  
Scale Model ◽  
The Novel ◽  
Mountain Areas ◽  
Long Span ◽  
Main Cable ◽  
Specific Distribution ◽  
Static Responses

The rail-cable-shifting-girder (RCSG) technique is a new erecting method for the main girders of the long span suspension bridge in rural mountain areas with poor transportation and no navigable rivers for carrying large components. The pseudo-static analysis of the shifting-girder process for this girder erecting technique is performed. The global mechanical model of the double-layer cable system in the shifting-girder process is established, by analytically modeling the main-cable, rail cable, and slings according to cable’s basic assumptions. Based on the flexible cable theory, the main-cable segments are simulated as segmental catenary elements, the slings are considered as straight cable elements, the rail-cable segment that the shifting-girder trolley is moving on is simulated as multiple straight cable elements and other rail-cable segments are considered as single straight cable elements. The solving program is developed to obtain the pseudo-static responses including the forces and deflections of the shifting-girder system undergoing girder loads. Meanwhile, a global indoor reduced-scale model of shifting-girder system is designed to validate the presented theoretical results, by taking the Aizhai suspension bridge as engineering background. The results from the presented theoretical method match well with the measured experimental results of the indoor model test. The forces and deflections of the main-cable, rail-cable, and slings for the 21 working cases of erecting girder segments exhibit some specific distribution regularities. The presented theoretical method is able to correctly and effectively solve the pseudo-static responses of the RCSG system undergoing girder loads for the long span suspension bridge adopting the construction method of the RCSG technique.

scholarly journals Numerical simulation of temperature induced structural static responses for long-span suspension bridge

2017 ◽  
Vol 210 ◽  
pp. 246-252
Author(s):  
Lan Chen ◽  
Jingliang Deng ◽  
Linren Zhou ◽  
Yong Xia
Keyword(s):  
Numerical Simulation ◽  
Suspension Bridge ◽  
Long Span ◽  
Static Responses

Fatigue Test on Integral Joint of the Main Truss of the Baling River Bridge

2009 ◽  
Vol 417-418 ◽  
pp. 481-484 ◽  
Author(s):  
Gao Liu ◽  
Wen Ming Wu ◽  
Liang Tang ◽  
Tian Liang Wang
Keyword(s):  
Fatigue Test ◽  
Fatigue Resistance ◽  
Suspension Bridge ◽  
Scale Model ◽  
Fatigue Reliability ◽  
Truss Bridges ◽  
Long Span ◽  
Load Spectra ◽  
Main Girder ◽  
Test Result

The Baling River Bridge is a single-span simply-supported suspension bridge with a main span of 1088 m. The steel stiffening truss is employed as its main girder and comprises the integral joints connecting the chord members. The integral joint is a key structure and determines the safety of the bridge, but it is very complex in detail and has an undefined fatigue resistance. In order to investigate its mechanical behavior and fatigue reliability, a fatigue test was performed on a 1:1.4 scale model of the integral joint of the main truss of the Bridge. With an assumption of the load spectra represented by the standard fatigue vehicle in BS 5400, the test fatigue load was derived accounting for the multiple vehicle effect and the model scale. The test result shows that no cracks were detected in the model when subjected to two million stress range cycles, and the structure has an reliable fatigue resistance satisfying the design requirement. This type of integral joint is an alternative for long-span truss bridges.

Thermal correlation analysis of a long-span suspension bridge static responses

2016 ◽  
Author(s):  
Linren Zhou ◽  
Lan Chen ◽  
Yong Xia ◽  
James M. W. Brownjohn
Keyword(s):  
Correlation Analysis ◽  
Suspension Bridge ◽  
Long Span ◽  
Static Responses ◽  
Thermal Correlation

Influence of Central Buckle on Dynamic Behavior of Long-Span Suspension Bridge with Deck-Truss Composite Stiffening Girder

2013 ◽  
Vol 838-841 ◽  
pp. 1096-1101 ◽  
Author(s):  
Feng Jiang Qin ◽  
Jin Di ◽  
Jie Dai ◽  
Guang Ling Li
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Great Influence ◽  
Suspension Bridge ◽  
Element Model ◽  
Vibration Modes ◽  
Element Analysis ◽  
Long Span ◽  
Main Cable ◽  
Central Buckle

A 3-D finite element model for Yueyang Dongting Lake bridge was established with a large scale general finite element analysis software, and the subspace iteration method was adopted to analyze the natural vibration characteristics of the bridge, meanwhile, the influences of settings different types of central buckles at the mid-span of the main spans between the main cables and girder on the dynamic behaviors of the long-span suspension bridge with deck-truss composite stiffening girder were studied. The results show that compared with only setting short hanger cable at mid-span, the the whole rigidity of suspension bridge is raised and the natural frequencies increase by the setting central buckle, but various types of vibration modes are affected in different extents; among all of these vibration modes, the antisymmetric vibration and Longitudinal floating of stiffening girder are most obviously affected. The stiffness of central buckle has a great influence on the vibration of main cable, while compared with only setting short hanger cable, the vibration of main cable increases 7.32% while setting the rigid central buckle. The conclusions of this paper provide theoretical basis for the using of central buckle in long-span suspension bridge.

Discussion about the Limit Span of Self-Anchored Suspension Bridge and Influencing Factors

2014 ◽  
Vol 587-589 ◽  
pp. 1473-1476
Author(s):  
Qiong Huang
Keyword(s):  
Static Analysis ◽  
Influencing Factors ◽  
Bending Moment ◽  
Suspension Bridge ◽  
Material Strength ◽  
Sectional Area ◽  
Cross Sectional ◽  
Strength Limit ◽  
Main Cable ◽  
Limit Span

Based on the material strength limit conditions of cable and stiffening girder, the static analysis of self-anchored suspension bridge was calculated. The stiffening girder of self-anchored suspension bridge was assimilated with elastic foundation girder. Considering of the action of both axial force and bending moment, the limit span of self-anchored suspension bridge was discussed. The limit span equation of three-span self-anchored suspension bridge with two towers was deduced. The influencing factors, such as ratio of rise to span of main cable, cross-sectional area and spacing of hangers, are studied, and the corresponding limit spans were given. It can provide valuable reference for the primary design of self-anchored suspension bridge.

Mechanical Characteristics Analysis of Sensitive Parameters of Long-Span Steel Truss Suspension Bridge

2011 ◽  
Vol 250-253 ◽  
pp. 3381-3386 ◽  
Author(s):  
Da Wang ◽  
Yi Zhou Zhu
Keyword(s):  
Free Vibration ◽  
Vibration Frequency ◽  
Mechanical Characteristics ◽  
Suspension Bridge ◽  
Vibration Characteristics ◽  
Structure Parameters ◽  
Long Span ◽  
Main Cable ◽  
Free Vibration Frequency ◽  
Central Buckle

In order to study the influences of structure parameters on the structure mechanical characteristics of long-span suspension bridge. The Shiduhe bridge in Hubei Province was taken as the background of this study, The influence on structure line shape and free vibration characteristics of suspension bridge with the change of structure parameters was studied. The results show that main cable stiffness not only has greater effect on the structure shape of long-span suspension bridge, it also has obvious impact on structure free vibration frequency, in addition, the torsion displacement of stiffening girder can be reduced effectively by adding central buckle, it improves structure bending and torsion stiffness significantly, central buckle also can improve free vibration frequency of structure and enhance structure dynamic stability, It shows that the influencing factors of structure static characteristics are restricted by rigidity of main cable, free vibration characteristics are affected by main cable and central buckle, they are not very sensitive to the variations of the parameters of suspender cable, stiffening girder and main tower.

scholarly journals Review on the Service Safety Assessment of Main Cable of Long Span Multi-Tower Suspension Bridge

2021 ◽  
Vol 11 (13) ◽  
pp. 5920
Author(s):  
Dagang Wang ◽  
Jihong Ye ◽  
Bo Wang ◽  
Magd Abdel Wahab
Keyword(s):  
Corrosion Fatigue ◽  
Safety Assessment ◽  
Failure Mechanisms ◽  
Suspension Bridge ◽  
Research Trends ◽  
Structural Safety ◽  
Suspension Bridges ◽  
Long Span ◽  
Main Cable ◽  
Bridge Failure

The long-span multi-tower suspension bridge is widely used in the construction of river and sea crossing bridges. The load-bearing safety and anti-sliding safety of its main cable are directly related to the structural safety of a suspension bridge. Failure mechanisms of the main cable of a long-span multi-tower suspension bridge are discussed. Meanwhile, the tribo-corrosion-fatigue of main cable, contact, and slip behaviors of the saddle and service safety assessment of the main cable are reviewed. Finally, research trends in service safety assessment of main cable are proposed. It is of great significance to improve the service safety of the main cable and thereby to ensure the structural safety of long-span multi-tower suspension bridges.

Design Method of the Cable Saddle for CFRP Main Cable in Long-Span Suspension Bridge

2011 ◽  
Vol 243-249 ◽  
pp. 1557-1560 ◽  
Author(s):  
Hong Yu Zheng ◽  
Huai Yan Jiang ◽  
Zhi Tao Lu
Keyword(s):  
Design Method ◽  
High Strength ◽  
Suspension Bridge ◽  
Contact Forces ◽  
Fiber Reinforced Polymer ◽  
Maintenance Cost ◽  
Final State ◽  
Long Span ◽  
Main Cable ◽  
Reinforced Polymer

A non-corrosion, high strength, light weight material – carbon fiber reinforced polymer (CFRP) is introduced to replace steel as cable system in long-span suspension bridge for improving loading efficiency, reducing maintenance cost, enlarging the span of suspension bridge. Because of the transverse weakness of CFRP, traditional cable saddle is not suitable. The contact forces between main cable and cable saddle slot under final state are investigated with a simplified analytical method. According to the mechanical characteristics of CFRP and the formulas deduced, the design suggestion of cable saddle for CFRP main cable of long-span suspension bridge are proposed.

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