Earthquake Influence on the Rail Irregularity on High-Speed Railway Bridge

Rail irregularity is the leading cause of enhancing train-track coupling vibration and, therefore, should be studied in detail for safety requirements. In this study, the differences between existing rail irregularities without being subjected to an earthquake between different countries were first studied. Results show that existing power spectrum density and time-domain displacement samples of rail irregularities in the American code are the largest, while the irregularities of the Germany railway are higher than those of China in a specific range of rail wavelengths. Afterward, the effects of earthquake intensity, soil site, and duration on the rail irregularity of a Chinese typical high-speed railway bridge were investigated. For this purpose, a finite element model was established and validated by the shaking table test of a 1/12-scaled high-speed railway bridge experimental specimen. The calculation results indicated that the influences of earthquakes on the rail alignment irregularity were evident.

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Shaking table test of a high-speed railway bridge with a new isolation system

Engineering Structures ◽

10.1016/j.engstruct.2019.109315 ◽

2019 ◽

Vol 196 ◽

pp. 109315 ◽

Cited By ~ 1

Author(s):

Shuang Zou ◽

Heisha Wenliuhan ◽

Fulin Zhou

Keyword(s):

High Speed ◽

Shaking Table Test ◽

Shaking Table ◽

Railway Bridge ◽

High Speed Railway ◽

Isolation System

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Seismic Response Analysis of High-Speed Railway Bridge Fabricated Round-Ended Piers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3844 ◽

2011 ◽

Vol 243-249 ◽

pp. 3844-3847 ◽

Cited By ~ 4

Author(s):

Ling Kun Chen ◽

Li Zhong Jiang ◽

Zhi Ping Zeng ◽

Bo Fu Luo

Keyword(s):

Finite Element ◽

High Speed ◽

Strong Motion ◽

Element Model ◽

Theory Of Elasticity ◽

Response Analysis ◽

Seismic Load ◽

Railway Bridge ◽

Earthquake Intensity ◽

High Speed Railway

The responses of high-speed railway bridge subjected to seismic load were investigated by numerical simulation, the whole finite element model of the multi-span bridge simply supported bridge was set up, and natural vibration properties of structure were analyzed. According to theory of elasticity and elastic-plasticity, parametric study was conducted to assess the influences of different speeds, strong motion record, pier height and earthquake acceleration on the seismic capability of high-speed bridge subjected to different strength of the earthquake, the finite element soft ware and moment-curvature program were employed to calculate the earthquake responses of bridge. The calculation results show that, with the increase of train speed, pier height and earthquake intensity, the earthquake responses of bridge are increase in general, and the bottom of piers step into states of elastic-plasticity under high-level earthquake, elastic-plastic deformation is larger, the stirrup encryption measures should be carried out.

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The shaking table test study of elastic seismic response of high-speed railway bridge considering track constraint

Civil Engineering and Urban Planning ◽

10.1142/9789813225237_0049 ◽

2017 ◽

Cited By ~ 2

Author(s):

Z W Liu ◽

X C Chen ◽

Z N Liu

Keyword(s):

Seismic Response ◽

High Speed ◽

Shaking Table Test ◽

Shaking Table ◽

Railway Bridge ◽

High Speed Railway ◽

Test Study

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Numerical Modeling and Simulation on Seismic Performance of High-Speed Railway Bridge System

Noise & Vibration Worldwide ◽

10.1260/0957-4565.42.10.15 ◽

2011 ◽

Vol 42 (10) ◽

pp. 15-21 ◽

Cited By ~ 5

Author(s):

Lingkun Chen ◽

Lizhong Jiang ◽

Zhiping Zeng ◽

Weiguo Long

Keyword(s):

High Speed ◽

Element Model ◽

Seismic Load ◽

Vehicle Speed ◽

Railway Bridge ◽

Earthquake Intensity ◽

High Speed Railway ◽

Set Up ◽

High Level ◽

Bridge System

In this paper, the responses of high-speed railway bridge subjected to seismic load were investigated by numerical simulation. Elastic deformation will occur in the bridge system under low-level earthquake; however, the bridge system may enter a nonlinear stage under high-level earthquake. The whole finite element model of the bridge system was set up by means of ANSYS software and self-compiled moment-curvature relationship program, the elastic seismic responses of bridge system and the elastic-plastic deformation of piers considering different vehicle speeds are calculated respectively. The calculation results show that, the earthquake responses of bridge system are increase in general with the increase of vehicle speed and earthquake intensity, and the bottom of piers step into elastic-plasticity stage under high-level earthquake, the plastic hinges occurred at the pier bottom, the pier bottom step into the plastic stage, some measures such as lateral reinforced steel encryption should be taken into account to ensure safety.

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Shaking table test of composite foundation reinforcement of saturated silty soil for high speed railway

Frontiers of Architecture and Civil Engineering in China ◽

10.1007/s11709-007-0047-6 ◽

2007 ◽

Vol 1 (3) ◽

pp. 353-360 ◽

Cited By ~ 3

Author(s):

Guanlu Jiang ◽

Xianfeng Liu ◽

Jianwen Zhang ◽

Ruyi Zhao

Keyword(s):

High Speed ◽

Shaking Table Test ◽

Composite Foundation ◽

Shaking Table ◽

High Speed Railway ◽

Silty Soil

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Earthquake response of continuous girder bridge for high-speed railway: A shaking table test study

Engineering Structures ◽

10.1016/j.engstruct.2018.11.047 ◽

2019 ◽

Vol 180 ◽

pp. 249-263 ◽

Cited By ~ 8

Author(s):

Lizhong Jiang ◽

Xin Kang ◽

Changqing Li ◽

Guangqiang Shao

Keyword(s):

High Speed ◽

Shaking Table Test ◽

Shaking Table ◽

Earthquake Response ◽

High Speed Railway ◽

Test Study ◽

Continuous Girder Bridge ◽

Girder Bridge

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Multiaxial Fatigue Assessment for the Hanger Deck Connection of a High-Speed Steel-Truss-Arch Railway Bridge

Applied Sciences ◽

10.3390/app11031142 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1142

Author(s):

Yongsheng Song ◽

Youliang Ding ◽

Fei Jiang ◽

Zhiwen Wang ◽

Jun Lu ◽

...

Keyword(s):

Finite Element ◽

Fatigue Life ◽

Fatigue Damage ◽

High Speed ◽

Element Model ◽

Multiaxial Fatigue ◽

Railway Bridge ◽

High Speed Railway ◽

Steel Truss ◽

Fatigue Evaluation

Steel-truss-arch bridges have been applied in high-speed railway bridges due to their excellent dynamic and static structural performance. Under the action of high-speed trains, the steel connections between hangers and decks suffer from repeated stresses, inducing potential fatigue problems or even fatigue failure. In this study, a multiaxial fatigue evaluation method was first created and established based on critical damage-plane methodology, following which the fatigue evaluation procedure was also created and recommended. The methodology was applied to real-life strain data from a high-speed railway bridge from which an assessment of fatigue damage and predicted fatigue life was estimated. The connection between the shortest hanger and deck on the downstream side was selected as the target due to its relatively high stress. A multiscale finite-element model of this bridge was created according to the design profile and monitoring results of traffic flow, where the finite-element model was calibrated and validated by comparing the calculation results with the monitoring data. Influence analysis was then carried out to investigate two factors—i.e., the total traffic flow and compositions of freight trains—having effects on the fatigue life of the steel connection. The results indicate that the applied multiaxial fatigue method is suitable for online fatigue evaluation of actual bridges. In addition, by using the multiaxial fatigue method, the fatigue-damage accumulation rate can be nearly 60 times that obtained by the uniaxial fatigue method. If freighting is taken into consideration, the fatigue damage will increase rapidly, and for the case 10% of proportion traffic as freighting, the actual fatigue life is estimated to be shorter than the design life.

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Local Optimization Analysis of Bailey Beam Bracket Based on Multiscale Model

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.815.229 ◽

2019 ◽

Vol 815 ◽

pp. 229-234

Author(s):

Qin Tian ◽

Cheng Hao Hang ◽

Zi Xin Wan ◽

Yun Peng Zou

Keyword(s):

Finite Element ◽

High Speed ◽

Structural Parameters ◽

Bending Moment ◽

Element Model ◽

Railway Bridge ◽

High Speed Railway ◽

Finite Element Software ◽

Steel Cushion ◽

Structural Measure

In the construction of high-speed railway bridge, the stress of Bailey beam is much higher than that of other parts due to the large local compressive stress and bending moment at the fulcrum. To solve this problem, this paper proposes a structural measure of adding double I-steel cushion between Bailey beam and top beam to alleviate the larger stress at the fulcrum and make the support more uniform. Based on the Bailey beam support system of cast-in-situ high-speed railway bridge of Lianshui County super large bridge, the multi-scale finite element model of Bailey beam support is established by ABAQUS general finite element software, and the influence law of structural parameters of double-jointed I-steel cushion on support stress is analyzed. The research shows that the rigidly of the double-jointed I-beam cushion should not be too large or too small. When the length is appropriate, it can effectively alleviate the problem of excessive stress at the fulcrum of Bailey beam, and is a safe, economical and simple new structural measure.

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