scholarly journals Dynamic Characteristics of High-speed Railway Steel Bridges

2007 ◽  
Vol 17 (7) ◽  
pp. 632-637 ◽  
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Steel Bridges ◽  
High Speed Railway

Study on Influences of Thickness of Flange of U Rib on Mechanical Behaviors of Orthotropic Monolithic Steel Bridge Deck System

2010 ◽  
Vol 163-167 ◽  
pp. 122-126 ◽  
Author(s):  
Ru Deng Luo ◽  
Mei Xin Ye ◽  
Ye Zhi Zhang
Keyword(s):  
Finite Element Analysis ◽  
Yangtze River ◽  
High Speed ◽  
Bridge Deck ◽  
Steel Bridges ◽  
Engineering Practice ◽  
Steel Bridge ◽  
Mechanical Behaviors ◽  
Element Analysis ◽  
High Speed Railway

Orthotropic monolithic steel bridge deck system stiffened by U rib is very fit for high-speed railway steel bridges because of its excellent mechanical behaviors. Thickness of flange is a very important parameter of U rib and has influence on mechanical behaviors of orthotropic monolithic steel bridge deck system. Based on the engineering practice of Anqing Yangtze River Railway Grand Bridge, the kind and the extents of influences of thickness of flange of U rib on mechanical behaviors of orthotropic monolithic steel bridge deck system are studied with finite element analysis. The results show that thickness of flange of U rib has relative large positive influences on rigidity, strength and stability of orthotropic monolithic steel bridge deck system. 14~18mm is the appropriate range of thickness of flange of U rib for high-speed railway steel bridges.

Two steel bridges for the high speed railway line in Spain

Stahlbau ◽  
2010 ◽  
Vol 79 (3) ◽  
pp. 181-187 ◽  
Author(s):  
Juan A. Sobrino
Keyword(s):  
High Speed ◽  
Steel Bridges ◽  
High Speed Railway ◽  
Railway Line

Model test on dynamic characteristics of invert and foundation soils of high-speed railway tunnel

2015 ◽  
Vol 14 (3) ◽  
pp. 549-559 ◽  
Author(s):  
Juan Huang ◽  
Tieying Yuan ◽  
Limin Peng ◽  
Jun Yu ◽  
Zude Ding
Keyword(s):  
Model Test ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Railway Tunnel ◽  
High Speed Railway

Dynamics of a Current Collector for a High-Speed Railway

1975 ◽  
Vol 97 (2) ◽  
pp. 731-738
Author(s):  
Kazuo Yoshida ◽  
Katsushi Manabe ◽  
Taro Shimogo
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Current Collector ◽  
Experimental Investigations ◽  
High Speed Railway ◽  
Collector System ◽  
Train Speed ◽  
Proper Values ◽  
Very High ◽  
A Current

In this paper, a mathematical model of a collecting rail and collector system with sliding contactors is proposed for a current collector system of a very-high-speed railway. Its dynamic characteristics, especially the variation of contact force and the probability of contact break, are investigated by means of linear analysis. In order to prove the appropriateness of the linear model, the computer simulation and theoretical analysis are performed using a nonlinear model. Experimental investigations are also performed in order to examine the dynamic characteristics of the model. From these results, it is concluded that the probability of contact break can be kept to less than about 10 percent for a train speed of 500 km/hr by choosing the proper values of natural frequencies and damping ratios under constraints.

scholarly journals Experimental Study of the Dynamic Characteristics of a New Antidrainage Subgrade Structure for High-Speed Railways in Diatomaceous Earth Areas

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 532
Author(s):  
Qian Su ◽  
Zhixing Deng ◽  
Xun Wang ◽  
Wenyi Jia ◽  
Yunbin Niu
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Diatomaceous Earth ◽  
Water Resistance ◽  
Resistance Index ◽  
Local Environment ◽  
Vibration Acceleration ◽  
High Speed Railway ◽  
Engineering Construction ◽  
Field Excitation

The experience needed to carry out engineering and construction in diatomaceous earth areas is currently lacking. This project studies the new Hang Shaotai high-speed railway passing through a diatomaceous earth area in Shengzhou, Zhejiang Province, and analyzes the hydrological and mechanical properties of diatomaceous earth on the basis of a field survey and laboratory. Moreover, a new antidrainage subgrade structure was proposed to address the rainy local environment, and field excitation tests were performed to verify the antidrainage performance and stability of the new subgrade structure. Finally, the dynamic characteristics and deformation of the diatomaceous earth roadbed were examined. The hydrophysical properties of diatomaceous earth in the area are extremely poor, and the disintegration resistance index ranges from 3.1% to 9.0%. The antidrainage subgrade structure has good water resistance and stability under dynamic loading while submerged in water. After 700,000 loading cycles, the dynamic stress and vibration acceleration of the surface of the subgrade bed stabilized at approximately 6.37 kPa and 0.94 m/s2, respectively. When the number of excitations reached 2 million, the settlement of the diatomaceous earth foundation was 0.08 mm, and there was basically negligible postwork settlement of the diatomaceous earth foundation. These results provide new insights for engineering construction in diatomaceous earth areas.

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