scholarly journals Seismic analysis of high-speed railway irregular bridge–track system considering V-shaped canyon effect

2021 ◽  
Author(s):  
Zhihui Zhu ◽  
Yongjiu Tang ◽  
Zhenning Ba ◽  
Kun Wang ◽  
Wei Gong
Keyword(s):  
Seismic Response ◽  
Earthquake Engineering ◽  
High Speed ◽  
Seismic Analysis ◽  
Ground Motions ◽  
Back Side ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Track System ◽  
Canyon Topography

AbstractTo explore the effect of canyon topography on the seismic response of railway irregular bridge–track system that crosses a V-shaped canyon, seismic ground motions of the horizontal site and V-shaped canyon site were simulated through theoretical analysis with 12 earthquake records selected from the Pacific Earthquake Engineering Research Center (PEER) Strong Ground Motion Database matching the site condition of the bridge. Nonlinear seismic response analyses of an existing 11-span irregular simply supported railway bridge–track system were performed under the simulated spatially varying ground motions. The effects of the V-shaped canyon topography on the peak ground acceleration at bridge foundations and seismic responses of the bridge–track system were analyzed. Comparisons between the results of horizontal and V-shaped canyon sites show that the top relative displacement between adjacent piers at the junction of the incident side and the back side of the V-shaped site is almost two times that of the horizontal site, which also determines the seismic response of the fastener. The maximum displacement of the fastener occurs in the V-shaped canyon site and is 1.4 times larger than that in the horizontal site. Neglecting the effect of V-shaped canyon leads to the inappropriate assessment of the maximum seismic response of the irregular high-speed railway bridge–track system. Moreover, engineers should focus on the girder end to the left or right of the two fasteners within the distance of track seismic damage.

scholarly journals Rotational Friction Damper’s Performance for Controlling Seismic Response of High Speed Railway Bridge-Track System

2019 ◽  
Vol 120 (3) ◽  
pp. 491-515 ◽  
Author(s):  
Wei Guo ◽  
Chen Zeng ◽  
Hongye Gou ◽  
Yao Hu ◽  
Hengchao Xu ◽  
...  
Keyword(s):  
Seismic Response ◽  
High Speed ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Track System

Effects of CRTS II Unballasted Track on Seismic Response of High-Speed Railway Bridge

2014 ◽  
Vol 584-586 ◽  
pp. 2099-2104 ◽  
Author(s):  
Yong Liang Zhang ◽  
Pei Shan Wang ◽  
Ji Dong Zhao
Keyword(s):  
Seismic Response ◽  
High Speed ◽  
Response Analysis ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Bridge Model ◽  
Longitudinal Stiffness ◽  
Girder Bridge ◽  
Transitional Section ◽  
Earthquake Response Analysis

Based on properties of high-speed railway bridge and rail system restraints, the rail-bridge model is established by considering CRTS II unballasted track and bridge structure. The results show that the effect of CRTS II system restraints on seismic response for multi-span simply supported girder bridge is greater so the rail-bridge model should be adopted in earthquake response analysis. Due to the effect of longitudinal stiffness of the railway and bridge transitional section such as terminal spine, the more significant is unloading for seismic response of the side piers if the fewer is the number for the rear-structure spans.

Numerical Seismic Analysis of Simply-Supported Girder Railway Bridge under High-Speed Train Load

2011 ◽  
Vol 80-81 ◽  
pp. 566-570
Author(s):  
Hui Wang ◽  
Guo Ding ◽  
Huan Tang ◽  
Ling Kun Chen
Keyword(s):  
High Speed ◽  
Seismic Analysis ◽  
Rapid Development ◽  
Railway Bridge ◽  
High Speed Train ◽  
Seismic Responses ◽  
Mass System ◽  
High Speed Railway ◽  
Simply Supported ◽  
Bridge System

Along with rapid development of high-speed railway in many countries, recently research on seismic response of high-speed railway bridge under train load has raised much concern among researchers. The whole bridge finite element model is establish to analysis the seismic responses of simply-supported girder railway bridge subjected to high-speed train in this paper, ICE series high speed vehicle is employed as train live load, the vehicle is simulated by moving spring-mass system, The track irregularities can be obtained by Simpack software, the birdge incluing superstructure and substructure is three-dimensional space beam element, the bottom of piers is proposed consolidated. elastic seismic responses of bridge system and elastic-plastic deformation of piers considering different train speeds are calculated. The calculation results indicate that, seismic responses of bridge system are increase with the increase of train speed and earthquake intensity, and the bottom of piers will step into elastic-plasticity stage under high-level earthquake, the plastic hinges occurred within 1.4 meters of bottom of pier. The numerical results can provide some references for design of high-speed railway bridge.

Seismic damage features of high-speed railway simply supported bridge–track system under near-fault earthquake

2020 ◽  
Vol 23 (8) ◽  
pp. 1573-1586 ◽  
Author(s):  
Wei Guo ◽  
Xia Gao ◽  
Ping Hu ◽  
Yao Hu ◽  
Zhipeng Zhai ◽  
...  
Keyword(s):  
High Frequency ◽  
High Speed ◽  
Seismic Damage ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Simply Supported ◽  
Near Fault ◽  
Track System ◽  
Pulse Type

Seismic loads pose a potential threat to the high-speed railway bridges in China, which have been rapidly developing in recent years, especially for those subjected to the near-fault earthquakes. The previous researches on high-speed railway bridges usually concern the far-field earthquake, and the damage of high-speed railway bridge–track system subjected to the near-fault earthquake has not been well studied. In this article, a seven-span high-speed railway simply supported bridge–track system is selected to explore the seismic damage features under the excitation of near-fault earthquake which possesses characteristics of obvious velocity pulse and high-frequency vibration. First, a detailed finite element model of the selected bridge–track system is established and calibrated by the experimental data and design code. Then the low-frequency pulse-type portion and the high-frequency background portion are separated from the selected eight original near-fault records, and a series of nonlinear dynamic analysis is conducted. The results show that the background portion leads to more serious damage of the bridge–track system than the pulse-type portion. Due to the high stiffness of high-speed railway bridge–track system, the background portion with high-frequency vibration characteristic produces the main part of seismic response of system. As for the damage part of system, the weakest component of the bridge–track system is the sliding layer, followed by the shear alveolar.

Elastic-plastic seismic response of CRTS II slab ballastless track system on high-speed railway bridges

2017 ◽  
Vol 60 (6) ◽  
pp. 865-871 ◽  
Author(s):  
Bin Yan ◽  
Shi Liu ◽  
Hao Pu ◽  
GongLian Dai ◽  
XiaoPei Cai
Keyword(s):  
Seismic Response ◽  
High Speed ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Elastic Plastic ◽  
Ballastless Track ◽  
Track System
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