scholarly journals A Study on the Dynamic Interaction between Three-Axle Vehicle and Continuous Girder Bridge with Consideration of Braking Effects

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Xuan-Toan Nguyen ◽  
Van-Duc Tran ◽  
Nhat-Duc Hoang
Keyword(s):  
Rapid Development ◽  
Dynamic Interaction ◽  
Impact Factors ◽  
The Finite Element Method ◽  
Bending Vibration ◽  
Traffic Loading ◽  
Girder Bridges ◽  
Continuous Girder Bridge ◽  
Reaction Forces ◽  
Girder Bridge

Continuous girder bridges become increasingly popular because of the rapid development of highway throughout the world. Most of previous researches on vibration analysis of a multispan continuous bridge subject to complex traffic loading and vehicle dynamic interaction focus on the girder displacement not considering braking effects. In current literature, few studies have discussed the effects of braking on continuous girder bridges. In this study, we employ the finite element method (FEM) to investigate the dynamic response of continuous girder bridge due to three-axle vehicle. Vertical reaction forces of axles that change with time make bending vibration of girder increase significantly. The braking in the first span is able to create response in other spans. In addition, the dynamic impact factors are investigated by both FEM and experiments on a real bridge structure. The results of this study extend the current understanding of the bridge dynamic behaviors and can be used as additional references for bridge codes by practicing engineers.

Dynamic interaction between the two-axle vehicle and continuous girder bridge with considering vehicle braking force

2014 ◽  
Vol 36 (1) ◽  
pp. 49-60 ◽  
Author(s):  
Nguyen Xuan Toan
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
High Strength ◽  
Dynamic Interaction ◽  
Inertia Force ◽  
Bending Vibration ◽  
Girder Bridges ◽  
Bridge Structures ◽  
Continuous Girder Bridge ◽  
Girder Bridge

Nowadays, the structures of continuous girder bridges are becoming more and more popular with the rapid development of highway networks in many nations around the world, including Vietnam. High strength materials are commonly used to construct the bridge structures, so they are very slender and sensitive to the effects of dynamic loads, especially in the cases that vehicles run with high speed or brake suddenly on the bridges. In this paper, the author would like to introduce the study of a model of dynamic interaction between two-axle vehicle and continuous girder bridge. The model of a two-axle vehicle consists of three masses, taking into account the inertia force and friction force between the tires and the bridge surface due to vehicle braking. Vertical reaction forces of axles which change with time make bending vibration of beam increase significantly. The results of the experiment on the Hoaxuan Bridge and the analysis of the computerized model indicate that dynamic factors are substantial when vehicle brakes suddenly on bridge.

scholarly journals Determination of dynamic impact factor for continuous girder bridge due to vehicle braking force by finite element method and experimental

2017 ◽  
Vol 39 (2) ◽  
pp. 149-164
Author(s):  
Nguyen Xuan Toan ◽  
Tran Van Duc
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Impact Factors ◽  
Dynamic Impact ◽  
Bending Vibration ◽  
Continuous Girder Bridge ◽  
Reaction Forces ◽  
Girder Bridge ◽  
Dynamic Impact Factor ◽  
Element Method

In this study, the finite element method (FEM) is used to investigate the dynamic response of continuous girder bridge due to moving three-axle vehicle . Vertical reaction forces of axles that change with time make bending vibration of girder significantly  increase. The braking in the first span is able to create response in other spans. In addition, the dynamic impact factors are investigated by both FEM and experiment for Hoa Xuan bridge. The results of this study provide an improved understanding of the bridge dynamic behavior and can be used as additional references for bridge codes by practicing engineers.

scholarly journals An Investigation on the Dynamic Response of Cable Stayed Bridge with Consideration of Three-Axle Vehicle Braking Effects

2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Xuan-Toan Nguyen ◽  
Van-Duc Tran ◽  
Nhat-Duc Hoang
Keyword(s):  
Dynamic Response ◽  
Bridge Deck ◽  
Impact Factors ◽  
Bending Vibration ◽  
Traffic Loading ◽  
Cable Stayed Bridge ◽  
Central Vietnam ◽  
Reaction Forces ◽  
High Level ◽  
The Impact

The cable-stayed bridge (CSB) is often used to span over the large rivers on the highway with a high-level navigational clearance; however, CSB is very sensitive to live load. Most of the previous studies on vibration analysis of CSB that focus on complex traffic loading and vehicle dynamic interaction as well as on the bridge deck do not consider braking effects thoroughly. In this paper, the finite element method (FEM) is used to investigate the dynamic response of CSB due to a three-axle vehicle considering braking effects. Vertical reaction forces of axles that change with time make bending vibration of the bridge deck increase significantly. The braking in a span is able to create response in other spans, towers, and cables. In addition, the impact factors are investigated on both FEM and experiment with a case study of Pho Nam bridge (Danang city, Central Vietnam). The results of this study provide an improved understanding of the CSB dynamic behaviors, and they can be used as useful references for bridge codes by practicing engineers.

Test and Numerical Study on the Seismic Performance of A Cable Restrainer for Girder Bridges

2019 ◽  
Author(s):  
Yitong Gu ◽  
Wancheng Yuan ◽  
Xinzhi Dang
Keyword(s):  
Seismic Performance ◽  
Numerical Study ◽  
Design Method ◽  
Lateral Displacement ◽  
Static Test ◽  
Girder Bridges ◽  
Continuous Girder Bridge ◽  
Service Conditions ◽  
Girder Bridge ◽  
Parametric Analyses

<p>In China, most of the support systems applied by short/medium span bridges are elastomeric pad bearings (EPBs). This type of support system has no reliable connections between bearings and girders as well as bearings and piers, which will cause structural damages due to large lateral displacement of bearings under earthquakes. The restrainers used currently could restrict the deformation of bridges under normal service conditions and could only restrict unidirectional displacement. Considering the disadvantages of these restrainers, a new restrainer called Connected Cable Restrainer (CCR), which can be used in short/medium span bridges supported by EPBs, is developed in this paper. The design principle, basic configuration, isolation mechanism and the design method of CCR are introduced. A pseudo static test to study the seismic performance of CCR is conducted. Seismic responses of a 3-span continuous girder bridge with CCR are simulated using OpenSees platform and parametric analyses of the two main parameters, lateral restraining displacement and restraining stiffness, are also carried out. Results show that the deformation of bridges under normal service conditions would not be restrained using CCR and the displacement responses can be mitigated effectively by using CCR through parameter optimization.</p>

Application of Expansion Double Spherical Seismic Isolation Bearing in Seismic Design of Continuous Girder Bridges

2011 ◽  
Vol 243-249 ◽  
pp. 1928-1934 ◽  
Author(s):  
Tian Bo Peng ◽  
Zhen Nan Wang ◽  
Xun Tao Yu ◽  
Cheng Yu Yang
Keyword(s):  
Seismic Design ◽  
Seismic Isolation ◽  
Seismic Analysis ◽  
Design Method ◽  
Longitudinal Direction ◽  
Vertical Displacement ◽  
Girder Bridges ◽  
Earthquake Effect ◽  
Continuous Girder Bridge ◽  
Girder Bridge

The double spherical seismic isolation (DSSI for short) bearing has been adopted in seismic design of several important engineering projects since developed recently. It was used generally as fixed bearings in a continuous girder bridge in these projects, and only a few fixed piers, usually just one fixed pier would transmit the horizontal earthquake action to the foundation, which is uneconomical and results in the much larger seismic risk in the longitudinal direction of a continuous girder bridge than that in the transverse direction. In order to share the earthquake effect with all the piers and avoid relative vertical displacement among all the bearings under the normal traffic conditions, a new seismic design method of continuous girder bridges is introduced. The configuration and working mechanism of two kinds of DSSI bearings used to make the new seismic design possible are introduced. It’s shown that the method is preferable for the seismic design of continuous girder bridges by a numerical seismic analysis with a four-span continuous girder bridge.

Study on Vehicle-Bridge Coupling Vibration of Equal Span Girder Bridge of Different Span Number

2013 ◽  
Vol 540 ◽  
pp. 63-68
Author(s):  
Wei Zhao Li ◽  
Zong Lin Wang ◽  
Hang Sun ◽  
Yan Li
Keyword(s):  
Surface Roughness ◽  
Influencing Factor ◽  
Dynamic Responses ◽  
Box Girder Bridges ◽  
Coupling Vibration ◽  
Average Value ◽  
Girder Bridges ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Traveling Speed

The vehicle-bridge coupling vibration of girder bridge has been widely investigated. But most of previous work focused on the influencing factor of the vibration, such as traveling speed of vehicle, deck surface roughness and vehicle-bridge frequency ratio etc. Taking the box girder bridges of different span number with 20m single span length for example, applying the separated iterative method to multi-sample analysis the vehicle-bridge coupling vibration. The study considered the influence of the vehicle, traveling speed and the random deck surface roughness and then took the average value of the sample to discuss the influence of the span number on the dynamic responses. Results show that the continuous girder form can effectively decrease the dynamic responses of the equal span girder bridge than the simple-supported form. But the influence of the span number on the responses of equal span continuous girder bridge is not obvious.

scholarly journals High-Speed Train-Track-Bridge Dynamic Interaction considering Wheel-Rail Contact Nonlinearity due to Wheel Hollow Wear

2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
Chao Chang ◽  
Liang Ling ◽  
Zhaoling Han ◽  
Kaiyun Wang ◽  
Wanming Zhai
Keyword(s):  
High Speed ◽  
Synthesis Method ◽  
Dynamic Interaction ◽  
High Speed Train ◽  
Train Track ◽  
High Speed Railway ◽  
Long Span ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Track Bridge

Wheel hollow wear is a common form of wheel-surface damage in high-speed trains, which is of great concern and a potential threat to the service performance and safety of the high-speed railway system. At the same time, rail corridors in high-speed railways are extensively straightened through the addition of bridges. However, only few studies paid attention to the influence of wheel-profile wear on the train-track-bridge dynamic interaction. This paper reports a study of the high-speed train-track-bridge dynamic interactions under new and hollow worn wheel profiles. A nonlinear rigid-flexible coupled model of a Chinese high-speed train travelling on nonballasted tracks supported by a long-span continuous girder bridge is formulated. This modelling is based on the train-track-bridge interaction theory, the wheel-rail nonelliptical multipoint contact theory, and the modified Craig–Bampton modal synthesis method. The effects of wheel-rail nonlinearity caused by the wheel hollow wear are fully considered. The proposed model is applied to predict the vertical and lateral dynamic responses of the high-speed train-track-bridge system under new and worn wheel profiles, in which a high-speed train passing through a long-span continuous girder bridge at a speed of 350 km/h is considered. The numerical results show that the wheel hollow wear changes the geometric parameters of the wheel-rail contact and then deteriorates the train-track-bridge interactions. The worn wheels can increase the vibration response of the high-speed railway bridges.

The Reliability Study of LRB Continuous Girder Bridges Subject to Seismic Excitation

2010 ◽  
Vol 29-32 ◽  
pp. 209-214
Author(s):  
Wen Jing Liu ◽  
Li Li ◽  
Kun Ye
Keyword(s):  
Base Isolation ◽  
Guangdong Province ◽  
Seismic Excitation ◽  
Reliability Study ◽  
Girder Bridges ◽  
Continuous Girder Bridge ◽  
Study Case ◽  
Girder Bridge ◽  
First Time ◽  
Isolation Performance

LRB base isolation technology is different from the traditional continuous girder structure system, and shows good isolation performances. However, because fixed piers were canceled and all bearings were LRB, it is often considered that the reliability of structure might be reduced. Therefore, the reliability of LRB continuous girder bridges subject to seismic excitation was systematically studied from different indicators for the first time in this paper, the world's first double traffic double deck isolated continuous girder bridge – Dongjiang double-layer-pier isolated approach bridge in Dongguan of Guangdong province was adopted as study case. The results shows that, when the effect of pile-soil interaction is considered, LRB system still has a very good isolation performance; pounding subjected to seismic must be analyzed; dynamic stability needs checking when higher piers and larger earthquake displacement. Generally speaking, the reliability of LRB continuous girder bridges subject to seismic excitation won’t be reduced.

Dynamic Analysis and Test Validation for Continuous Girder Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1539-1542
Author(s):  
Ya Xun Yang ◽  
Peng Liu
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Rapid Development ◽  
Test Validation ◽  
Traffic Network ◽  
Box Girder ◽  
Finite Element Software ◽  
Bridge Testing ◽  
Continuous Girder Bridge ◽  
Girder Bridge

With the rapid development of technology of bridge, bridge as an important part of the traffic network, the safety of its operations was getting more and more attention by people. In order to ensure the bridge can be safe and reliable operating, the newly built bridge testing had become a necessary measures. In this paper, a three span continuous box girder bridge (28+36+28m) was taken as an example, To analyze and calculate its dynamic characteristics, the finite element software MISAS was used. And it was verified through experiments.

Dynamic Response of Bridge Girder and Shear Keys Subjected to Pounding during Earthquakes

2013 ◽  
Vol 339 ◽  
pp. 515-519
Author(s):  
Lu He ◽  
Lu Zhang ◽  
Jia Yong Chen ◽  
Chu Dong Pan ◽  
Yu Xiang Liu
Keyword(s):  
Dynamic Response ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Movement Characteristics ◽  
Shear Keys ◽  
Continuous Girder Bridge ◽  
Bridge Girder ◽  
Girder Bridge

Shear keys have been widely used to control the damage in abutments and piles during earthquakes. To investigate the dynamic response of bridge girder and traverse shear keys subjected to pounding, a three dimensional model of continuous girder bridge is developed in this study. With the assistance of the finite element method program ANSYS and the package LS-DYNA, the pounding between bridge girder and shear keys is simulated. Subsequently, the stress and displacement responses of the model are analyzed, and the movement characteristics are presented.

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