Influence of Damage of Suspenders on Static Performances of Steel-Box Stacked Arch Bridge

2013 ◽  
Vol 655-657 ◽  
pp. 1864-1867
Author(s):  
Kun Zhang ◽  
Jun Qing Lei ◽  
Shan Shan Cao
Keyword(s):  
High Speed ◽  
Element Model ◽  
Internal Force ◽  
High Speed Railway ◽  
Arch Bridge ◽  
Long Span ◽  
Service Period ◽  
Calculation Results ◽  
Non Destructive

Suspender is an important component of through arch bridge which transfers loads from bridge deck to arch rib, and its mechanical property is closely related to the safety of whole bridge. When suspender is damaged, the change of its tension will lead to internal force redistributions of the arch bridge. In this thesis, taken Xinkai River Bridge of Harbin-Dalian high-speed railway as a case study, which is the first long-span steel-box stacked arch bridge for high-speed railway in China, a finite element model is established by using the MIDAS/Civil software. By analyzing the calculation results and comparing static performances under non-destructive conditions, the influence of damage of suspenders on steel-box stacked arch bridge is summarized, which can provide reference data for health evaluation of the bridge during service period.

scholarly journals Design of Pedestrian Landscape Flying-Bird Arch Bridge with Cable-Stayed Cable and Lissajous Curved Arch Rib

2021 ◽  
Vol 237 ◽  
pp. 04024
Author(s):  
Guangchuan Zhu ◽  
Wenping Xu ◽  
Jinfa Xu
Keyword(s):  
Bridge Deck ◽  
Element Model ◽  
Internal Force ◽  
Steel Tube ◽  
Dynamic Mode ◽  
Structural Dynamic ◽  
Arch Bridge ◽  
Curved Bridge ◽  
Long Span ◽  
Positive Projection

In view of the demand of super long span pedestrian landscape bridge with curved deck, this paper proposes a kind of cable-stayed and flying-brid arch bridge with Lissajous curved arch rib and double curved bridge deck. Its plane positive projection is Lissajous curve figure, the side elevation of the arch rib is the shape of the cable-stayed and flying-brid arch, and the arch foot cable and the upper space cable between the arch ribs are installed on the Lissajous spatial curved arch rib with concrete-filled steel tube to form a self balanced structure system, which floats and drags across the river. The main arch sling and the tail cable are installed, the double curved bridge deck and the central circular sightseeing platform are suspended, and multiple groups of spatial cables work well together to complement each other, with having complementary advantages. Combined with the actual project, the parameter design is carried out, the Midas finite element model is established, the internal force of the structure is calculated, the structural dynamic mode and stability analysis are carried out, the rationality of its structural performance is verified by analysis and research.

Additional forces on continuously welded rails of a long-span high-speed railway suspension bridge under single effect and multiple effects: A case study

2021 ◽  
pp. 136943322110603
Author(s):  
Xiangdong Yu ◽  
Nengyu Cheng ◽  
Haiquan Jing
Keyword(s):  
High Speed ◽  
Suspension Bridge ◽  
Element Model ◽  
Maximum Tensile Stress ◽  
Dominant Factor ◽  
High Speed Railway ◽  
Expansion Joints ◽  
Long Span ◽  
Bending Load ◽  
Single Effect

This paper investigates the track–bridge interactions of the Wufengshan Yangtze Bridge, the longest high-speed railway suspension bridge in China. A finite element model of the track and bridge is built using the commercial software ANSYS. The longitudinal additional forces of the track under a single effect and combination effects of temperature rising load, bending load, and braking load are calculated. The numerical results show that strong additional forces appear in the continuously welded rail of the Wufengshan Yangtze Bridge. Temperature effect is the dominant factor for the residual internal forces. The maximum tensile stress is 115.5 MPa and the extreme compressive stress reaches 329.9 MPa. Rail expansion joints are needed for this long-span suspension bridge.

Additional Longitudinal Expansion Force between Continuous Welded Rails and Extra-Long Continuous Bridges of High-Speed Railway

2012 ◽  
Vol 178-181 ◽  
pp. 2304-2307
Author(s):  
Wen Shuo Liu ◽  
Gong Lian Dai
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Element Model ◽  
High Speed Railway ◽  
Long Span ◽  
Spring Element ◽  
Longitudinal Stiffness ◽  
Longitudinal Resistance ◽  
Expansion Force ◽  
Track Bridge

In order to investigate the additional expansion force of continuous welded rails (CWR) on extra-long continuous bridges of high-speed railways, the integrative spatial finite element model of track-bridge-pier system is established with the nonlinear spring element simulating the longitudinal resistance between track and bridge. In this paper, the influences of several parameters to the additional expansion force of CWR are studied, including the different resistance models, the number of main spans, the arrangement of adjacent bridges as well as the pier’s longitudinal stiffness. Some conclusions are drawn through comparisons and analysis, which could provide valuable references for design and application of long-span continuous bridges on high-speed railways.

scholarly journals Discussion of 800m Composite Bridge with CFST Flying Swallow Arch and Self-anchored Suspension Cable

2021 ◽  
Vol 293 ◽  
pp. 02058
Author(s):  
ZhaoYang Chen ◽  
WenPing Xu
Keyword(s):  
Element Model ◽  
Internal Force ◽  
Steel Tube ◽  
The Self ◽  
Arch Bridge ◽  
Long Span ◽  
Cfst Arch Bridge ◽  
Composite Bridge ◽  
Rib Structure ◽  
Suspension Cable

In view of the demand of 800 meters Super Long Span CFST arch bridge, the composite bridge of CFST flying swallow arch and self-anchored suspension cable is proposed. The thrust of flying-bird CFST arch bridge and the tension of self-anchored suspension bridge are balanced, forming a self-balanced structure system. The arch rib structure is mainly stressed, supplemented by the self-anchored suspension system, which works together and has complementary advantages. Using the single leaf hyperboloid variable section steel tube four limb space truss arch rib structure, the self-weight of the mid span arch rib section structure is reduced, the risk of construction and hoisting of the mid span section is reduced, the section size at the arch foot is increased, the mass center and stiffness center of the arch bridge structure are effectively reduced, and the stability of the super long span concrete-filled steel tube arch bridge is increased. Combined with the actual project, the parameters are designed, the Midas finite element model is established, the internal force analysis and calculation, modal analysis and buckling analysis are carried out, and the superiority of the structural technical measures is verified.

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