Effect of dead, live and blast loads on a suspension bridge. In this paper, we investigate vehiclebridge interactions and propose a new method for assessing bridge conditions based on nonlinear vibration analysis. Thus, no interaction between vehicle bridge and no track irregularities are regarded. In this paper, a solid vehiclebridge interaction vbi analysis method is developed to provide refined analysis on the bridge responses including displacement and local stress under vehicle loads. For nonuniform continuous bridge in actual projects, the theoretical analysis and field testing of the dynamic response under moving vehicle are carried out. Analysis and simulation of the vehiclebridgeinteraction in horizontally. Traditionally, the seismic response analysis of a bridge does not account for the concurrent vehiclebridge dynamic interaction. The governing equations of a vehicle model with twelvedegrees of freedom 12dof are derived from the energy method using the lagrange equation of motion. The comparison of different approaches to model vehiclebridge. Vehiclebridge interaction analysis by dynamic condensation. Dynamic analysis of a railway bridge subjected to high. This paper proposes a nonlinear multispring tire nmst model for dynamic analysis of vehiclebridge interaction vbi system considering separation and surface roughness. Dynamic responses of prestressed bridge and vehicle through.
Dynamic analysis of windvehiclebridge system based on. Dynamic vehiclebridge interaction under simultaneous. The wri element is implemented into a general fe software framework, opensees, and verified by the dynamic analysis of a simplysupported beam subjected to a moving sprung mass. The study aims at the dynamic analysis of the wvb system based on rigidflexible coupling method, which takes advantage of the high modeling efficiency for structures of fe software and the powerful wheelrail analysis function of mbs software. Vehicle bridge interaction analysis on concrete and steel. The composition of an interaction element and the parts of car bodies in contact is regarded as a substructure. Dynamic analysis of a railway bridge subjected to high speed. Coupled analysis is a wide topic covered in several publications, i recommend vehiclebridge interaction dynamics yang, yau and wu, 2004. This paper presents a unified framework for dynamic analysis of vehiclebridge interaction vbi systems using a commercial finite element software suite abaqus. We focus on strctural health monitoring, dynamic analysis and performance prediction. The study aims at the dynamic analysis of the wvb system based on rigidflexible coupling method, which takes advantage of the high modeling efficiency for structures. Vehicle bridge dynamic interaction using finite element modelling, finite element analysis, david moratal, intechopen, doi. Recent studies relating to the dynamic response of bridges have been performed to characterize the response of a structure based on the forcing function vehiclebridge interaction and its.
Analysis and simulation of the vehiclebridgeinteraction. For high speed or heavy trains a dynamic analysis is nec. The dynamic interaction between a moving vehicle and the sustaining bridge is studied. Because of the excitation from vehicles wheels, a bridge will produce dynamic deformation and vibration when a vehicle passes on, and the dynamic responses of the bridge will a. Finite element procedures have been developed to treat interaction problems of various complexities, while the analytical solutions established for some typical problems. Threedimensional bridgevehicle interaction analysis of simply. This paper presents a practical framework for estimating the fatigue life of suspenders under repeated traffic loads by taking a threepylon suspension bridge as an example. Fatigue damage of suspenders is a main concern during the lifecycle maintenance of arch bridges and suspension bridges. Actually, the maximum deflection of a rail bridge and the maximum impact force on a rail bridge significantly depend on the dynamic interaction between wheel and rail and the dynamic characteristics of train and bridge. Then one obtains the dynamic analysis model by using the finite element method and the vehiclebridge interaction equation based on the. An interaction element is defined to consist of a bridge element and the suspension units of the vehicle resting on the element.
The german ice electric multiple unit emu train refined threedimensional space vehicle model is set up by multisystem dynamics software simpack, and the multiple nonlinear. Nonlinear vibration analysis of vehiclebridge interaction. Vehiclebridge dynamic interaction using finite element modelling respect to the bridge centreline is small compared to the ratio of bridge length to bridge width. This paper proposes a nonlinear multispring tire nmst model for dynamic analysis of vehicle bridge interaction vbi system considering separation and surface roughness. Dynamic interaction force exists between a vehicle and a bridge deck when the vehicle moves on top. Fe analysis of vehicle bridge interaction was conducted using commercial program lsdyna and the super computer at the florida state university. Dynamic analysis of vehiclebridge interaction based on. The comparison of different approaches to model vehiclebridge interaction. The vibration of a river bridge under a moving vehicle is recorded and analyzed. Vehicleinduced random vibration of railway bridges. Provided by the authors and university college dublin. The global matrixes of the 2d grillage and plate bridge models are the result of assembling 1d beam and 2d plate elementary matrixes respectively. Analysis and simulation of the vehiclebridgeinteraction in. Development and interaction of a detailed truck using proper design standards were applied to realistically represent the actual loading conditions.
Firstly, eulerlagrange equation is applied to derive the vibration equation of threeaxle vehicle. This paper presents results of the finite element fe analysis of dynamic interaction between a heavy truck and a selected highway bridge on us 90 in florida. The main objective of this book is to establish efficient numerical models within the framework of finite element method to solve the dynamic response of the vehiclebridge interaction vbi systems for vehicles moving with constant velocity or with acceleration. Vehiclebridge interaction analysis using halfcar model. Firstly, diagnosis process should be done to detect the fault or faults that generate high levels of vibrations. The vehicle bridge interaction can induce bridge vibration and consequently fatigue, durability deterioration, local damage, and even collapse of bridge structure. Ansysbased spatial coupled vibration analysis method of. Coupled vibration analysis of vehiclebridge system based on. The number, location and properties of the elements employed in 2d. One of the major applications of train rail interaction, for example, 19 proposed a twoaxle vehicle on an eulerbernoulli beam the bridge interaction using finite element model. Finite element analysis framework for dynamic vehiclebridge interaction system based on abaqus article in international journal of structural stability and dynamics january 2020 with 109 reads. A nonlinear multispring tire model for dynamic analysis. For evaluating the vehicle, bridge interaction in terms of passenger comfort of a vehicle on a flexible structure for constant velocity has been given in 18.
In this method, the dynamic responses of vehicle subsystem and bridge subsystem are solved separately, the iteration within timestep is avoided, the computation memory is saved, the programming difficulty is reduced, and it is easy to adopt the. Finite element analysis framework for dynamic vehicle. First, a nonlinear singlespring tire nsst model is developed, which can only provide compression force rather than extension force. First, the basic theory of vehiclebridge interaction vbi is introduced and a finite element. In addition, vehiclebridge models are separately established in finite element modeling, without consideration of vehicleroadbridge interaction vrbi. Dynamic analysis of vehiclebridge interaction based on interfacial contact algorithm.
A thorough understanding of this moving load problem is crucial for the design of bridge and its condition assessment as well as control of overweight vehicle. This study may be used as a cornerstone of the dynamic analysis of large scale complicated structures. Recent developments in inverse problems of vehiclebridge. The train crosses the bridge at constant speed and is represented by moving axle forces. This paper presents an overview on inverse problems in vehiclebridge interaction dynamics. Request pdf finite element analysis framework for dynamic vehiclebridge interaction system based on abaqus this paper presents a. Recent research and applications of numerical simulation. Therefore, it is necessary to establish a vehicleroadbridge coupling model that is closer to reality, more efficient, and accounts for the actual tire effect. For high speed or heavy trains a dynamic analysis is necessary because of the potential for resonance of the bridge structures. By the method of modal superposition, closedform solutions are obtained for the vertical responses of both the bridge and moving vehicle, assuming the vehiclebridge mass ratio to be small.
Vehiclebridge interaction element for dynamic analysis. Because of the huge amount of kinetic energy carried at high speeds, a train may interact significantly with the bridge and even resonate with it under certain circumstances. An ansysbased spatial approach of analysis is proposed for the bridgevehicle interaction to investigate the dynamic responses of a curved concrete box girder bridge and vehicles. Rigidflexible coupled dynamic response of steelconcrete. This study examines the seismic response of a vehiclebridge interacting vbi system under vertical. The governing equations of a vehicle model with twelvedegreesoffreedom 12dof are derived from the energy method using the lagrange equation of motion.
This framework can provide bridge designers and engineering practitioners with a general platform to analyze the coupled system with high modeling efficiency and accuracy in. Road vehiclebridge interaction considering varied vehicle. An intersystem iteration method is proposed for dynamic analysis of coupled vehiclebridge system. Finite element analysis of vehiclebridge interaction. Vehiclebridge dynamic interaction using finite element modelling combination of 1d, 2d andor 3d finite elements. A vehicle model is presented, and the dynamic load on the bridge is quantified based on bridge road roughness. Pdf vehiclebridge interaction element for dynamic analysis.
The analysis has been performed modelling the train as a series of point loads. Dynamic analysis of windvehiclebridge system based on rigidflexible coupling method. Furthermore, a realistic vtb system with a moving fourwheel vehicle is investigated to evaluate the cases where the additional displacement and nonlinear wri should be. This paper presents a unified framework for dynamic analysis of vehiclebridge interaction vbi systems using a commercial finite element software suite abaqusformula.
Kovalev laboratory of computational mechanics bryansk state technical university, russia abstract the present paper describes the caebased approach for analysis of dynamics of a coupled model of a flexible railway bridge and a train. Dynamic analysis of road vehiclebridge systems under turbulent wind by means of finite element models. In this paper, a solid vehicle bridge interaction vbi analysis method is developed to provide refined analysis on the bridge responses including displacement and local stress under vehicle loads. Dynamic analysis of windvehiclebridge system based on rigid. In order to cover the complexity of coding and extend the generality on the road vehiclebridge iteration, a process to solve vehiclebridge interaction considering varied vehicle speed based on a convenient combination of matlab simulink and ansys is presented. In this part, the dynamic vehicle bridge interaction is only approximately modelled by using the code specified dynamic amplification factor daf or dynamic load coefficient dlc. The main attention is paid to comparing different models of the bridges, in. These models were improved over the years in better structural modelling, wheelrail interactions, and integration solution approaches. Vehiclebridge dynamic interaction using finite element modelling 26. Vehiclebridge dynamic interaction using finite element modelling, finite element analysis, david moratal, intechopen, doi. Both the bridge and the vehicle system are discretized. Numerical models for vehiclebridge interaction dynamic.
Firstly, this study proposes an original scheme for the threedimensional 3d analysis of the dynamic interaction between trains and horizontally curved railway bridges. Materials free fulltext fatigue life estimation for. Coupled analysis is a wide topic covered in several publications, i recommend vehicle bridge interaction dynamics yang, yau and wu, 2004. Recent research and applications of numerical simulation for. Dynamic analysis of nonuniform continuous girder bridge. Pdf the objective of this study is to develop an element that is both accurate and efficient for modeling the vehiclebridge interaction vbi in. The dynamic analysis model of the cablestayed bridge is established by finite element method, and the natural vibration properties of the bridge are analyzed. Dynamic analysis of vehicle bridge interaction based on interfacial contact algorithm. The widespread approach supposes analysis of a finite element model of a bridge under action of. A nonlinear multispring tire model for dynamic analysis of. Dynamic analysis of coupled vehiclebridge system based on. Chapter 4 application of vehiclebridge interaction dynamics 4. Vehicle bridge dynamic interaction using finite element modelling respect to the bridge centreline is small compared to the ratio of bridge length to bridge width.
Based on commercial software ansys mechanical apdl, 3d beam element, mass element and springdamper element are integrated together in building a 3d vehicle and bridge system. The studied vehicle is idealized as 3d nonlinear model consisting of several lumped masses connected. However, the behavior of a seismically excited bridge can jeopardize the safety of the vehicles running on it, even if the bridge itself remains undamaged. Fe analysis of vehiclebridge interaction was conducted using commercial program lsdyna and the super computer at the florida state university. Usually, research of the dynamics of railway bridges is carried out based on a simplified description of the vehiclebridge interaction. In this method, the dynamic responses of vehicle subsystem and bridge subsystem are solved separately, the iteration within timestep is avoided, the computation memory is saved, the programming difficulty is reduced, and it is easy to adopt the commercial structural analysis software for. In this way, the road vehicle is modeled in state space and the corresponding motion equations are solved using simulink. S d, is dynamic strain at the center of sensor location ss is static strain at the center of sensor location the dynamic and static responses of any bridge depend on the types of bridges.
Based on commercial fe software ansys and mbs software simpack, the rigidflexible. Bridge models can be continuous or made of discretized finite elements. In order to cover the complexity of coding and extend the generality on the road vehicle bridge iteration, a process to solve vehicle bridge interaction considering varied vehicle speed based on a convenient combination of matlab simulink and ansys is presented. The objective of this study is to develop an element that is both accurate and efficient for modeling the vehiclebridge interaction vbi in analysis of railway bridges carrying highspeed trains, which may consist of a number of cars in connection. An ansysbased spatial approach of analysis is proposed for the bridge vehicle interaction to investigate the dynamic responses of a curved concrete box girder bridge and vehicles. Then one obtains the dynamic analysis model by using the finite element method and the vehicle bridge interaction equation based on the displacement coordination relationship of the contact between wheels and bridge. Thus, no interaction between vehiclebridge and no track irregularities are regarded.
In this method, the dynamic responses of vehicle subsystem and bridge subsystem are solved separately, the iteration within timestep is avoided, the computation memory is saved, the programming difficulty is reduced, and it is easy to adopt the commercial structural analysis software for bridge. Jun 15, 20 the commercial operation of the bullet train in 1964 in japan marked the beginning of a new era for highspeed railways. Coupled vibration analysis of vehiclebridge system based. Force element is utilized to define the interaction between. We conduct filed experiments, lab experiments and perform simulations using finite element analysis fea software such as abaqus on powerful worktations. Finite element analysis framework for dynamic vehiclebridge. The vehiclebridge interaction can induce bridge vibration and consequently fatigue, durability deterioration, local damage, and even collapse of bridge structure. Key features are the 3d formulations for both the vehicle system and the bridge system, and. An intersystem iteration method is proposed for dynamic analysis of coupled vehicle bridge system. Dynamic analysis of vehiclebridge interaction system. A simplified numeric method is developed for solving the interaction problem, considering the effect of random road roughness and its velocity term.
Jun 02, 20 the main objective of this book is to establish efficient numerical models within the framework of finite element method to solve the dynamic response of the vehicle bridge interaction vbi systems for vehicles moving with constant velocity or with acceleration. Using the finiteelement method, a vehicle is modeled as lumped masses supported by springs and dashpots and a bridge is modeled with rough pavement. Introduction the inservice bridges are subjected to moving vehicles every day and the dynamic interactions between vehicles and bridges can, on one hand, induce the bridge vibration and consequently the fatigue, durability deterioration, local damage, and even collapse of the bridge structure and on the other hand, lead to the influence on the vehicle safety as well as passengers comfort. In this part, the dynamic vehiclebridge interaction is only approximately modelled by using the code specified dynamic amplification factor daf or dynamic load coefficient dlc. Recent studies relating to the dynamic response of bridges have been performed to characterize the response of a structure based on the forcing function vehicle bridge interaction and its basic parameters, such as length. Vehicle models can consist of moving constant forces, masses or sprung masses. Vehiclebridge dynamic interaction using finite element. This vehiclebridge interaction modeling was done using a finite element software known as visual bridge design system vbds. Using the finite element method, a vehicle is modeled as lumped masses supported by springs and dashpots and a bridge is modeled with rough pavement. Vehiclebridge dynamic interaction using finite element modelling. Therefore, it is necessary to establish a vehicleroadbridge coupling model that is closer to reality, more.
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