Nonlinear analysis of the ballast influence on the train-bridge resonance of a simply supported railway bridge

Structures ◽  
2022 ◽  
Vol 35 ◽  
pp. 303-313
Author(s):  
Mohamed Tahiri ◽  
Abdellatif Khamlichi ◽  
Mohammed Bezzazi
Keyword(s):  
Nonlinear Analysis ◽  
Railway Bridge ◽  
Simply Supported

Case Study of the 156 m Simply Supported Steel Truss Railway Bridge

2017 ◽  
Vol 27 (4) ◽  
pp. 563-568 ◽  
Author(s):  
Xiangdong Yu ◽  
Yongle Deng ◽  
Bin Yan
Keyword(s):  
Railway Bridge ◽  
Simply Supported ◽  
Steel Truss

An analytical method for full-range mechanical behavior of continuous slab-deck in multi-span simply supported concrete bridges

2021 ◽  
pp. 136943322110427
Author(s):  
Xiang Zhang ◽  
Quan-Sheng Yan ◽  
Bu-Yu Jia ◽  
Zheng Yang ◽  
Ying-Hao Zhao ◽  
...  
Keyword(s):  
Nonlinear Analysis ◽  
Full Range ◽  
Scale Model ◽  
Axial Stiffness ◽  
Spring Model ◽  
Analysis Model ◽  
Rotational Spring ◽  
Simply Supported ◽  
Continuous Slab ◽  
Rotational Spring Model

Connecting the ends of girders with a continuous slab-deck to make a multiple-span simply supported girder bridge provides many benefits, but there is no suitable nonlinear analysis model which considers continuous slab-deck cracking under tension and bending. In this article, the rotational spring model is further refined to replace the restraining effects at both ends of the girder by the simplified mechanical model associated with axial stiffness, bending stiffness, and shear stiffness. Then, it is introduced into the analysis of continuous slab-deck. The more accurate rotations and displacements of both ends of continuous slab-deck are obtained to investigate the more precise moment and tension of the continuous slab-deck. Furthermore, this article presents an improved nonlinear analysis model of continuous slab-deck based on a detailed boundary rotational spring model. The displacements of important positions and the strain of key components in continuous slab-deck after cracking are investigated by numerical analysis and full-scale model test to verify the accuracy of the proposed nonlinear analysis model. The result shows that the nonlinear analysis model presented in this article could successfully evaluate the depth of cracks and the stress of rebars in continuous slab-deck, and it is instructional in predicting the cracking state of the continuous slab-deck and the reinforcement design.

scholarly journals Analysis of Longitudinal Force of Beam and Rail of Continuously Welded Rails (CWR) on Railway Bridge

2022 ◽  
Vol 2148 (1) ◽  
pp. 012065
Author(s):  
Zhiping Zeng ◽  
Ji Hu ◽  
Qiang Zeng ◽  
Zhibin Huang ◽  
Huatuo Yin ◽  
...  
Keyword(s):  
Element Model ◽  
Longitudinal Force ◽  
Relative Displacement ◽  
Railway Bridge ◽  
Simply Supported ◽  
Maximum Value ◽  
Constant Resistance ◽  
Left And Right ◽  
The Right ◽  
Track Bridge

Abstract To study the longitudinal force of CWR on viaduct, a track-bridge-pier finite element model is established. Taking a multi-span simply supported beam with a maximum span of 32.7m of an elevated CWR as an example, the additional expansion and contraction forces, displacement between rail and beam and the force of pier are calculated, and whether the rail stress meets the requirements when setting constant resistance fasteners is checked. The results show that: (1) For the left and right lines, the maximum additional expansion forces of single strand rail are both 211.13kN, and the maximum relative displacements between beam and rail are both 6.572mm. (2) The maximum value of the additional expansion and contraction forces and the relative displacement between beam and rail of the same line occur at the same position. The left line is at ZFZ29 pier and the right line is at ZFS31 pier. (3) The maximum force of pier in this section is 500.80kN, and the pier numbers are ZFZ27 and ZFS29. (4) The rail stress is less than the allowable stress of 352MPa, and the rail strength meets the requirements.

Application of Finite Element Method for Nonlinear Analysis in Reinforced Concrete Structures

2012 ◽  
Vol 166-169 ◽  
pp. 935-938
Author(s):  
Ming Rong Zhou
Keyword(s):  
Finite Element ◽  
Nonlinear Analysis ◽  
Finite Element Modelling ◽  
Concrete Beam ◽  
Constitutive Relationship ◽  
Element Modelling ◽  
Simply Supported ◽  
Computation Process ◽  
Concrete Materials ◽  
Experimental Values

Finite Element modelling (FEM) has been expounded with the introduction of concrete materials constitutive relationship model.Meanwhile, bearing capacity of simply supported concrete beam is simulated by adopting FEM software-ANSYS through the whole computation process. Moreover, results of computed values and experimental values are compared demonstrating that related nonlinear analysis and treatment can be done well in this approach.

Probabilistic-based nonlinear analysis of a reinforced concrete railway bridge

2015 ◽  
Vol 105 (26) ◽  
pp. 1-8
Author(s):  
João Fernandes ◽  
José C Matos ◽  
Daniel V Oliveira
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Analysis ◽  
Railway Bridge

Dynamic Stability of a Girder Under Traveling Load Mass Systems

1991 ◽  
Vol 113 (3) ◽  
pp. 467-471
Author(s):  
T. Aida ◽  
R. Green
Keyword(s):  
Dynamic Stability ◽  
Railway Bridge ◽  
Additional Mass ◽  
Parametrically Excited ◽  
Simply Supported ◽  
Excited Vibration ◽  
Unstable Vibration ◽  
Parametrically Excited Vibration ◽  
Unsprung Mass ◽  
Load Mass

When a multi-vehicle train passes over a railway bridge, it may be expected that a parametrically excited vibration occurs in the girders, due to the change in the additional mass distribution caused by the unsprung mass of the vehicles. An analytical method to determine the dynamic stability of thin-walled beams under a sequence of equidistant masses traveling at a constant speed is developed in this paper. In the numerical examples, it is shown that the magnitude of the unsprung mass of vehicles, the distance between them and the speed of the vehicles have a large effect on the parametrically excited unstable vibration of girders. The dynamic stability of a simply supported railway bridge is clarified using the above method.

Study on the Effects of Train Live Loads on Isolated and Non-Isolated Simply Supported Railway Bridges

2011 ◽  
Vol 50-51 ◽  
pp. 100-104
Author(s):  
Chang Yong Zhang ◽  
Tie Yi Zhong ◽  
Ke Jian Chen ◽  
Yun Kang Gong
Keyword(s):  
Time History ◽  
Railway Bridge ◽  
Finite Element Program ◽  
Railway Bridges ◽  
Simply Supported ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
Element Program ◽  
Live Loads ◽  
High Level

In this paper, based on the finite element program ANSYS, the model of a simply supported railway bridge with and without isolation using lead rubber bearing is established. Seismic response time-history analyses of the bridge subjected to high-level earthquakes are carried out considering and not considering train live loads. Through the comparison and analyses of the results, the effects of train live loads on seismic calculation of non-isolated railway bridges and isolated railway bridges are obtained. The results of the research will support the further study on seismic design and isolation design of simply supported railway bridges.

Influencing Factors of Laws of Bending Force on Railway Bridge

2014 ◽  
Vol 926-930 ◽  
pp. 584-588
Author(s):  
Bao Ru Guo ◽  
Dun Jin Cai ◽  
Ping Wang ◽  
Yi Wen Deng
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Calculation Model ◽  
Railway Bridge ◽  
The Finite Element Method ◽  
Load Range ◽  
Simply Supported ◽  
Railway Line ◽  
Bending Force ◽  
Girder Bridge

Based on the finite element method and the theory of interaction between beam and rail, for girder bridge and the simply supported girder bridge which are common rail continuous bridge as an example, this establishes on railway line - bridge - bridge pier integration calculation model and analyzes the influence of the type of load and load range on the bending force law.

Sign in / Sign up

Export Citation Format

Share Document