Development of a Maglev Vehicle/Guideway System Interaction Model and Comparison of the Guideway Structural Analysis with Railway Bridge Structures

2011 ◽  
Vol 137 (2) ◽  
pp. 140-154 ◽  
Author(s):  
Hamid Yaghoubi ◽  
Hasan Ziari
Keyword(s):  
Structural Analysis ◽  
Interaction Model ◽  
Railway Bridge ◽  
Maglev Vehicle ◽  
Bridge Structures

INFORMAL DISCUSSION. RAILWAY BRIDGE STRUCTURES.

1975 ◽  
Vol 58 (1) ◽  
pp. 95-99 ◽  
Author(s):  
JE SPINDEL ◽  
DF GOODMAN ◽  
AM SOWDEN ◽  
PJG WIGLEY ◽  
GJ LUCAS
Keyword(s):  
Railway Bridge ◽  
Bridge Structures ◽  
Informal Discussion

scholarly journals Inspection and Numerical Analysis of an Ottoman Railway Bridge in Jordan

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Amin H. Almasri ◽  
Qusai Fandi Al-Waked
Keyword(s):  
Structural Analysis ◽  
Seismic Analysis ◽  
Construction Materials ◽  
Structural Condition ◽  
Railway Bridge ◽  
Railway Network ◽  
Earthquake Loads ◽  
Natural Factors ◽  
Body Construction ◽  
Stone Material

The construction of bridges represents a big challenge, since they require enormous economic effort and specialized technical skills. Bridges were historically important as they help connecting people and thus diffusing cultures, sharing ideas, and providing the backbone of transportation networks. This study focuses on the inspection and structural analysis of a 20th-century Ottoman railway stone arched bridge located on the Hejaz railway network in Jordan. The bridge has a very important cultural heritage value which stems from its history. The bridge stone material was cut and tested to determine its strength, in order to be used in the analysis. The structural analysis was carried out to assess the structural condition of the bridge and its suitability for reuse. The study includes static analysis under gravity loads and seismic analysis under earthquake loads. Despite the existence of deterioration in the bridge body construction materials due to a combination of human and natural factors, the analysis results proved enough structural capability to sustain the imposed gravity loads, but not a strong earthquake.

scholarly journals Model studies of flow parameters in the area of bridge supports

2021 ◽  
Vol 244 ◽  
pp. 05014
Author(s):  
Gennady Gladkov ◽  
Konstantin Morgunov ◽  
Yuri Ivanovsky
Keyword(s):  
River Flow ◽  
Flow Characteristics ◽  
Railway Bridge ◽  
Model Studies ◽  
Flow Parameters ◽  
Bridge Structures ◽  
Neva River ◽  
Residual Flows ◽  
Bridge Crossing ◽  
Maximum Minimum

The results of laboratory modeling of the influence of the bridge crossing supports erected during the construction of the highway near the existing railway bridge on the flow characteristics in the channel of the Neva River are presented. Modeling was carried out for two options for the location of the new bridge supports relative to the existing bridge structures. The limits of changes in the characteristics of the river flow are taken into account - the maximum, minimum and residual flows and benchmarks of the water level in the channel. Studies have shown that the construction of the designed bridge supports in the channel does not cause significant changes in the flow structure. There is a redistribution of the flow rate in the sections of the existing and designed bridges. The average velocities in the navigable span of the existing bridge are somewhat reduced when new supports are built. The velocity diagram is aligned along the width of the central and side spans, and a vortex wake is more clearly formed in the area behind the supports.

Study on Condition Assessment of Highway Bridge, Normal-Speed and High-Speed Railway Bridge

2011 ◽  
Vol 328-330 ◽  
pp. 1026-1030
Author(s):  
Zhao Lan Wei ◽  
Qian Hui Pu ◽  
Bin Li Wang
Keyword(s):  
Index System ◽  
High Speed ◽  
Condition Assessment ◽  
Highway Bridge ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Evaluation Indexes ◽  
Large Span ◽  
Bridge Structures ◽  
Normal Speed

There are lots of theories and methods about condition assessment for highway bridge, and gradual perfection for normal-speed railway bridge, but only little for high-speed railway bridge, especially large-span and special structures. After studying on the contents, methods, theories and evaluation indexes of highway bridge and normal-speed railway bridge, combined with the characteristics of high-speed railway bridge, index system for high-speed railway bridge(medium and small span, large-span or special bridge structures) was conceived and discussed, which laid the foundation for the development of condition assessment of high-speed railway bridge.

scholarly journals Evaluation of Performance Indicator of Railway Bridges Using Updated Finite Element Model

2019 ◽  
Vol 69 (2) ◽  
pp. 89-96
Author(s):  
Sokol Milan ◽  
Márföldi Monika ◽  
Venglár Michal ◽  
Lamperová Katarína
Keyword(s):  
Health Monitoring ◽  
Performance Indicator ◽  
Element Model ◽  
Fe Model ◽  
Railway Bridge ◽  
Railway Bridges ◽  
Evaluation Of Performance ◽  
Bridge Structures ◽  
Steel Railway Bridge

AbstractStructural health monitoring (SHM) can provide information needed to make important decisions regarding the maintenance of bridge structures. However, the data collected from monitoring needs to be first translated into actionable, quantitative or qualitative based characteristics, that indicate the condition of a bridge. This paper presents a process of evaluation of such performance indicator in case of a steel railway bridge using the updated FE model and in-situ measurements of strains on selected stringers and floorbeams.

scholarly journals CORROSION PROCESSES ON WEATHERING STEEL RAILWAY BRIDGE IN PRAGUE

2016 ◽  
Vol 78 (5-5) ◽  
Author(s):  
Viktor Urban ◽  
Vit Krivy ◽  
Vojtech Buchta
Keyword(s):  
Czech Republic ◽  
Experimental Testing ◽  
Specific Property ◽  
Correlation Factor ◽  
Weathering Steel ◽  
Railway Bridge ◽  
The Czech Republic ◽  
Corrosion Tests ◽  
Bridge Structures ◽  
Steel Railway Bridge

This contribution deals with experimental corrosion tests carried out on the weathering steel railway bridge in Prague. The basic specific property of the weathering steel is an ability to create in favourable environment a protective patina layer on its surface. Since 1968 weathering steel is used under the name “Atmofix” in the Czech Republic and can be used as a standard structural material without any corrosion protection. The weathering steel Atmofix is mostly used for bridge structures and lattice transmission towers. Some of these constructions built in the Czech Republic have been assessed and inspected in the last few years. Authors of this paper developed a new methodology of non-destructive experimental testing of corrosion processes. Testing specimens are installed on typical surfaces of steel bridges in such a way to simulate real conditions of the examined surface. This paper describes results of corrosion tests (thickness of corrosion products, corrosion losses and X-Ray analysis) after one-year exposure, correlation factor and dependence of location.  

scholarly journals The Modeling and Analysis for the Self-Excited Vibration of the Maglev Vehicle-Bridge Interaction System

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Jinhui Li ◽  
Jie Li ◽  
Danfeng Zhou ◽  
Lianchun Wang
Keyword(s):  
Ride Comfort ◽  
Interaction Model ◽  
Control Unit ◽  
The Self ◽  
Modeling And Analysis ◽  
Maglev Vehicle ◽  
Interaction System ◽  
Excited Vibration ◽  
Vibration Problems ◽  
The Stability

This paper addresses the self-excited vibration problems of maglev vehicle-bridge interaction system which greatly degrades the stability of the levitation control, decreases the ride comfort, and restricts the cost of the whole system. Firstly, two levitation models with different complexity are developed, and the comparison of the energy curves associated with the two models is carried out. We conclude that the interaction model with a single levitation control unit is sufficient for the study of the self-excited vibration. Then, the principle underlying the self-excited vibration is explored from the standpoint of work acting on the bridge done by the levitation system. Furthermore, the influences of the parameters, including the modal frequency and modal damping of bridge, the gain of the controller, the sprung mass, and the unsprung mass, on the stability of the interaction system are carried out. The study provides a theoretical guidance for solving the self-excited vibration problems of the vehicle-bridge interaction systems.

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