Longitudinal Seismic Response of Continuously Welded Track on Railway Arch Bridges

Liu, Hao; Wang, Ping; Wei, Xian‐Kui; Xiao, Jieling; Chen, Rong

doi:10.3390/app8050775

Cited by 7 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…exploration and application of this new type of high-speed railway bridge in Chin Though a few scholars have carried out studies on the interaction between and rigid-frame bridges [21,25,26], the stress characteristics of the rails on the nov gral rigid-frame bridge still remain unclear and the main influencing factors have no fully studied. In order to guarantee the running safety and reliability of HSR lines, 70 m integral rigid-frame bridge in the Fuzhou-Xiamen HSR was taken as a researc ject and the adaptability of the bridge-track system and the influence of different parameters are investigated and discussed in this paper.…”

Section: Differential Equationmentioning

confidence: 99%

“…The connection constraint parameters and their corresponding values are specifically provided in the Table 2. Several large-scale finite element (FE) software programs, such as ANSYS, ABAQUS and MIDAS, are widely adopted to study the track-bridge interaction of railway bridges ( [4,[11][12][13][14][16][17][18][19][20][25][26][27][28][29]). In [28], an analysis comparing such software with the calculating examples in UIC 774-3 was carried out and the analysis results verified the high precision of FE software.…”

Section: Project Introduction and Fine Element Modelmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Study on Track–Bridge Interaction of Integral Railway Rigid-Frame Bridge

et al. 2021

View full text Add to dashboard Cite

Track–bridge interaction (TBI) is an increasingly essential consideration for the design and operation of railway bridges, especially for the innovative bridge structure systems that constantly spring up over the years. This paper focuses on the characteristics of additional forces in continuous welded rails (CWRs) on the 3 × 70 m integral rigid-frame bridge of the Fuzhou–Xiamen High-Speed Railway, which is a novel high-speed railway (HSR) bridge structure system in China. The differential equations of rail stress and displacement are first investigated and an integrative analysis model comprising of rail, track, bridge and piers is then established. Secondly, the characteristics of representative additional forces are illustrated and the influences of different design parameters are discussed in detail. Furthermore, suitable rail fasteners, optimal layout schemes of adjacent bridges and reasonable stiffness of piers are also studied. The results indicate that the additional expansion force accounts for the largest proportion of additional forces in integral rigid-frame bridges and that resistance reduction obviously weakens the various additional forces caused by the TBI effect, while the broken gap of the rail increases greatly. Small resistance fasteners are recommended to be applied onto this new type of HSR line as these provide reductions in additional stresses of CWRs compared to WJ-8 fasteners. The additional rail stresses after adopting an adjacent span scheme of 4 × 32 m simply supported beams are less than the corresponding stresses in other schemes. The results also show that there is a strong correlation between the minimum threshold value of the pier stiffness and the longitudinal resistance of HSR lines for the integral rigid-frame bridge. This work could serve as a valuable reference for detailed design and safety evaluation of integral rigid-frame bridges.

show abstract

Section: Differential Equationmentioning

confidence: 99%

Section: Project Introduction and Fine Element Modelmentioning

confidence: 99%

Numerical Study on Track–Bridge Interaction of Integral Railway Rigid-Frame Bridge

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Since the 1960s, there have been multiple high-speed train derailments worldwide, which caused serious casualties and economic losses. One of the reasons for derailment is earthquakes [9][10][11]. Therefore, it is necessary to consider seismic effects in the study of the dynamic response of train-track-bridge coupled systems.…”

Section: Introductionmentioning

confidence: 99%

Influence of Variable Height of Piers on the Dynamic Characteristics of High-Speed Train–Track–Bridge Coupled Systems in Mountainous Areas

Zeng,

Jiang,

Zhang

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

With the increase in the occupancy ratio of bridges and the speed of trains, the probability of trains being located on bridges during earthquakes increases, and the risk of derailment increases. To investigate the influence of unequal-height piers on the dynamic response of high-speed railway train bridge systems, a seismic action model of high-speed train–track–bridge dynamic systems was established based on the in-house code using the finite element method and multi-body dynamics method. It is found that (1) compared to equal-height piers, the peak lateral dynamic response of unequal-height piers (with gradually increasing pier heights) decreases, while the peak vertical dynamic response increases; (2) the peak lateral dynamic response of unequal-height piers (with a steep increase in pier height) increases sharply, while the peak vertical dynamic response decreases; and (3) the safety indicators of equal-height piers are significantly superior to the two unequal-height pier operating conditions.

show abstract

“…As a kind of cable system, cable-stayed bridge has been widely applied in high-speed railway construction due to its large spanning capability. e bridge-track interactionis aggravated under the effects of various loads including the temperature, train load, and seismic load [1][2][3][4][5][6][7][8]. e bridgetrack interaction and distribution of rail longitudinal force on the long-span bridges are more complex than those on simply supported bridges and concrete continuous bridges [9,10].…”

Section: Introductionmentioning

confidence: 99%

Layout Optimization of Rail Expansion Joint on Long‐Span Cable‐Stayed Bridge for High‐Speed Railway

Cai

Liu

Xie

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Continuous welded rail (CWR) has been widely applied to the Chinese high-speed railways. It is interesting to reduce the effect of rail longitudinal force on the long-span cable-stayed bridges. Taking the pile-soil interaction into account, the finite element model of CWR on the long-span cable-stayed bridge is established based on the bridge-track interaction theory. The rail longitudinal force can be reduced and the track stability can be improved significantly by installing Rail Expansion Joint (REJ). The layout scheme of REJ plays a controlling role on designing CWR on bridges. Results show that the unidirectional REJ should be laid on both ends of the long-span cable-stayed bridge. Switch rails of REJ are set up on the main beam, stock rails are laid on the simply supported beams and crossing over beam joints, and several-meter long small resistance fasteners need to be laid on the sides of stock rails to reduce the fixed pier longitudinal force near the main beam. The range of REJ laid on cable-stayed bridge is mainly determined by temperature, rail breaking, and seismic condition; the bending and braking loads have little influence on it. Multiple field tests are carried out to prove the validity of the numerical model and the design methodology.

show abstract

Longitudinal Seismic Response of Continuously Welded Track on Railway Arch Bridges

Cited by 7 publications

References 19 publications

Numerical Study on Track–Bridge Interaction of Integral Railway Rigid-Frame Bridge

Numerical Study on Track–Bridge Interaction of Integral Railway Rigid-Frame Bridge

Influence of Variable Height of Piers on the Dynamic Characteristics of High-Speed Train–Track–Bridge Coupled Systems in Mountainous Areas

Layout Optimization of Rail Expansion Joint on Long‐Span Cable‐Stayed Bridge for High‐Speed Railway

Contact Info

Product

Resources

About