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 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.  

Study of the influence of track and wagon defects on the safety of railway bridge structures

2021 ◽  
pp. 2151-2157
Author(s):  
J.F. Rodrigues ◽  
L.F. Masini ◽  
M. Botelli ◽  
J. Junqueira ◽  
V. Barichello ◽  
...  
Keyword(s):  
Railway Bridge ◽  
Bridge Structures

scholarly journals Analysis of the technical condition of a railway bridge at risk of failure

2019 ◽  
Vol 284 ◽  
pp. 01005
Author(s):  
Mieczysław Piechota ◽  
Grzegorz Rogojsz
Keyword(s):  
Load Capacity ◽  
Degradation Process ◽  
Technical Condition ◽  
Steel Bridge ◽  
Bridge Structure ◽  
Railway Bridge ◽  
Railway Bridges ◽  
Actual Load ◽  
Bridge Structures

The paper presents an analysis of the technical condition of a railway bridge structure with a span structure in the form of welded girders. Static diagram of the structure consists of two simply supported beams. The theoretical span of the spans is 2 x 14.50 m, their overall length is 14.90 m, and the total length of the crossing is 30.6 m. The reasons for the formation and development of bridge degradation were analysed. In addition, the actual load capacity of the structure was determined and the possibility of its further operation was evaluated. Particular attention was given to the quality of workmanship and the degradation progress of welded joints, which led to the exclusion of the object from use. The main purpose of the presented analyses is to formulate general recommendations, whose implementation in a direct or indirect form may contribute to reducing the degradation process of railway steel bridge structures. When inspecting welded railway bridges, particular attention should be paid to the condition of welds and to control and prevent the structure from cracking.

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