scholarly journals ANALYSIS OF DIAPHRAGM BEHAVIOUR IN COMPOSITE MULTI GIRDER RAILWAY BRIDGES

2004 ◽  
Vol 10 (2) ◽  
pp. 143-150
Author(s):  
Yannick Sieffert ◽  
Gérard Michel ◽  
Didier Martin ◽  
David Keller ◽  
Jean-François Jullien
Keyword(s):  
Bridge Deck ◽  
Element Model ◽  
Longitudinal Distribution ◽  
Railway Bridge ◽  
Railway Bridges ◽  
Traffic Loads ◽  
Concrete Bridge Deck ◽  
Actual Geometry ◽  
Static Failure ◽  
Concrete Deck

This study focuses on mechanical behaviour of diaphragm in composite multigirders railway bridge. The aim is to predict and to compare, with a numerical simulation, the transverse and longitudinal distribution of traffic loads in different girders and in the slab for the cases with and without intermediary diaphragm. A 3‐D finite element model is developed to represent the actual geometry of multigirder bridge. Durability of the concrete bridge deck is directly related to cracking, so a non‐linear constitutive equation is used for the concrete deck. This study focuses on the response of a bridge with and without dipahragm under a UIC and TGV loading. To achieve this aim, a static failure analysis is performed. Our analysis concluded that diaphragm is not necessary, so it seems to be possible to remove the diaphragms.

Field and numerical investigation of the effect of under-sleeper pads on the dynamic behavior of railway bridges

2018 ◽  
Vol 232 (8) ◽  
pp. 2126-2137 ◽  
Author(s):  
Jaber Mottahed ◽  
Jabbar A Zakeri ◽  
Saeed Mohammadzadeh
Keyword(s):  
Numerical Investigation ◽  
Dynamic Behavior ◽  
Field Experiments ◽  
Bridge Deck ◽  
Numerical Models ◽  
Bridge Decks ◽  
Span Length ◽  
Railway Bridge ◽  
Railway Bridges ◽  
Northern District

There is a growing need to minimise vibrations of railway structures, especially the railway bridges, due to the increasing speed of trains. Various methods are used to reduce the effects of vibration on bridges. One of the methods is using under-sleeper pads. In this study, a real railway bridge – located in the northern district of Iran – with two spans and a free span length of 7 m was selected for the investigation of the effect of under-sleeper pads on the reduction of vibrations imposed on railway bridges. Field experiments – including the installation of an accelerometer to measure the accelerations beneath bridge decks, on the rail web, and next to the sleeper, and also the installation of Linear variable differential transformers (LVDTs) to measure the displacements of midspan point of bridge decks – were conducted. The effect of under-sleeper pads on the reduction of vibration accelerations, displacements, and moments of bridge midspan was investigated by developing numerical models of the bridge and validating its results through experimental outputs. The modeling predicts that the reduction of acceleration imposed on the deck in the first and second spans was different; the reduction effects in the first span were higher, where there was 58% reduction after using under-sleeper pads beneath the sleepers. There was a 15% decrease in the displacement of the bridge deck when under-sleeper pads are used. Similar results were obtained for the midspan moment of the bridge which reduced by 16%.

Sustained Load Effect on GFRP Bar Reinforced Concrete Deck

2011 ◽  
Vol 99-100 ◽  
pp. 1251-1254 ◽  
Author(s):  
Jian Wei Huang
Keyword(s):  
Reinforced Concrete ◽  
Stress Level ◽  
Bridge Deck ◽  
Sustained Load ◽  
Concrete Bridge ◽  
Load Effect ◽  
Reinforced Concrete Bridge ◽  
Gfrp Bar ◽  
Concrete Bridge Deck ◽  
Concrete Deck

This paper presents the investigation of sustained stress level in GFRP bar used as main reinforcement in typical reinforced concrete bridge deck, which is often subject to severe environmental exposures in North America. AASHTO LFRD approach is used for the design of GFRP RC deck that also meets with the requirements per as specified in ACI 440.1R-06. Research results show that the sustained stress level in GFRP bar varies in the range of approx. 3% -7% for bridge deck with various deck thickness and girder spacing.

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.

Local Stress Analysis of Orthotropic Steel Bridge Decks in High-Speed Railway

2011 ◽  
Vol 243-249 ◽  
pp. 1659-1663
Author(s):  
Yun Sheng Li ◽  
Yang Tian ◽  
Yan Ling Zhang
Keyword(s):  
High Speed ◽  
Maximum Stress ◽  
Bridge Deck ◽  
Local Stress ◽  
Element Model ◽  
Live Load ◽  
Steel Bridge ◽  
High Speed Railway ◽  
Railway Bridges ◽  
Orthotropic Steel Bridge Deck

Orthotropic decks are commonly used in high-speed railway bridges. Finite-element model is established by ANSYS for orthotropic steel bridge deck in this paper. Taking the standard PDL ZK live load as the train load, the local stress of the rib-to-deck joint, the rib-to-crossbeam joint, and the cut-outs of the crossbeam are analyzed respectively. Analysis results show that the stress concentration of bridge deck mainly appears at the intersecting part of the U-shaped rib, crossbeam, and bridge deck. In the whole bridge deck, the local stress level of the cut-outs in crossbeam is almost the highest, and the cut-outs is distorted seriously; the maximum stress of crossbeam cut-outs is mainly concentrated at the lower arc of the cut-outs, which is one of the positions prone to fatigue failure.

Field test of an open deck railway bridge with concrete ties

1989 ◽  
Vol 16 (4) ◽  
pp. 417-425
Author(s):  
Jude O. Igwemezie ◽  
M. Saeed mirza ◽  
J. F. Scott
Keyword(s):  
Prestressed Concrete ◽  
Bridge Deck ◽  
Impact Load ◽  
Load Factor ◽  
Railway Bridge ◽  
Railway Bridges ◽  
Railway Traffic ◽  
Dynamic Components ◽  
The Impact ◽  
Precast Prestressed Concrete

Prestressed concrete ties offer an alternative to the timber ties which are used presently on North American open deck railway bridges. This paper presents the results of a field study of an open deck railway bridge equipped with precast prestressed concrete ties subjected to a special work train and regular railway traffic. The results of the study show that a train with smooth wheels does not overload the bridge deck. When wheel defects are present, the bridge deck loading is speed-dependent and consists of distinct static and dynamic components. Test results show that the tie design loads are underestimated. The impact on the bridge deck due to the defective wheels was also found not to amplify the response of the bridge longitudinal steel girders. Key words: bearing pads, impact load, railway bridge, load distribution, dynamic load factor, open deck, precast prestressed concrete, ties, wheels.

scholarly journals A State-of-the-Art Review on Hybrid GFRP-Concrete Bridge Deck Systems

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Yize Zuo ◽  
Yuqi Cao ◽  
Yuqi Zhou ◽  
Wei Wei Liu
Keyword(s):  
Analytical Modeling ◽  
Bridge Deck ◽  
State Of The Art ◽  
Field Application ◽  
Future Research ◽  
Concrete Bridge ◽  
Pullout Tests ◽  
Shear Connections ◽  
Concrete Bridge Deck ◽  
Concrete Deck

The state-of-the-art review of hybrid GFRP-concrete systems for bridge decks is presented in this study. Previous research on the experimental work, analytical modeling, and field application on hybrid GFRP-concrete deck systems are presented, along with a variety of deck systems are discussed. Then, seven typical types of connection technology between FRP and concrete are introduced and compared. Besides, the current progress on the performance of shear connections via beam tests, pushout tests, and pullout tests are probed, respectively. Finally, general conclusions are made, identifying the need for future research.

Structural Characteristics of FRP-Concrete Bridge Deck System

2012 ◽  
Vol 178-181 ◽  
pp. 2369-2372
Author(s):  
Fan Li ◽  
Rong Xia Wang ◽  
Shun Wei Chen ◽  
Jian Bin Zhou
Keyword(s):  
Bridge Deck ◽  
Structural Characteristics ◽  
Highway Bridge ◽  
Concrete Bridge ◽  
Deck Panels ◽  
Concrete Girders ◽  
Frp Composite ◽  
Concrete Bridge Deck ◽  
Concrete Deck ◽  
Prestress Concrete

This paper describes the structural forms for hybrid FRP-concrete highway bridge deck. This bridge deck is applid in a project, which involved the implement of FRP-concrete deck over prestress concrete girders. In this project three forms of FRP reinforcing were combined to reinforce the concrete deck. This paper introduced another stiffened FRP deck panels connecte with the FRP composite girders in the steel-free FRP-composite modular bridge system. It is shown that the combination of FRP meterial and concrete for bridge deck is recommended in the design of highway bridge.

Use of fibre reinforced polymer reinforcement integrated with fibre optic sensors for concrete bridge deck slab construction

2000 ◽  
Vol 27 (5) ◽  
pp. 928-940 ◽  
Author(s):  
Brahim Benmokrane ◽  
Habib Rahman ◽  
Phalguni Mukhopadhyaya ◽  
Radhouane Masmoudi ◽  
Mohammed Chekired ◽  
...  
Keyword(s):  
Bridge Deck ◽  
Field Application ◽  
Concrete Bridge ◽  
Fibre Optic ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Frp Reinforcement ◽  
Concrete Bridge Deck ◽  
Concrete Deck ◽  
Deck Slab

The use of corrosion free fibre reinforced polymer (FRP) composites as reinforcement to concrete is currently being seen as a promising option to generate durable concrete structures. However, there exists very little credible information about its field application and performance. This paper describes the Joffre Bridge project, in Sherbrooke (Québec, Canada), over the St-François River, where Carbon Fibre Reinforced Polymer (CFRP) was used as reinforcement for a portion of the concrete deck slab. The bridge consists of five longitudinal spans with lengths varying from 26 to 37 m. Each span has a concrete deck supported by five steel girders at 3.7 m. A part of the concrete deck slab (7.3 × 11.5 m) and a portion of the traffic barrier and the sidewalk were reinforced with Carbon (CFRP) and Glass Fibre Reinforced Polymer (GFRP) reinforcement. The bridge was extensively instrumented with many different types of gauges, including integrated fibre optic sensors (FOS) into FRP reinforcement. The performance of the bridge had been assessed under static and dynamic loading using calibrated heavy trucks. Moreover, structural design and construction details of the bridge and instrumentation were performed. The results from calibrated field tests on the bridge are presented in this paper.Key words: concrete bridge deck, FRP reinforcement, fibre optic sensors (FOS), field calibrated tests, performance monitoring.

scholarly journals COMPARISON ANALYSIS OF RAILWAY BRIDGE MODUL FOR “I” GIRDER TYPE AND “WARREN” TRUSS TYPE

2020 ◽  
Vol 14 (1) ◽  
pp. 47-58
Author(s):  
Dwi Agus Purnomo ◽  
Djoko Prijo Utomo ◽  
Agung Barokah Waseso ◽  
Mira Marindaa
Keyword(s):  
Construction Materials ◽  
Live Load ◽  
Steel Bridge ◽  
Railway Bridge ◽  
Comparison Analysis ◽  
Dead Load ◽  
Line Load ◽  
Railway Bridges ◽  
Traffic Loads ◽  
Implementation Method

The railway bridge in Indonesia, with a width of 1067 mm, was built in 1878, so that maintenance modules are needed to repair or to replace of construction modul at regular intervals. Implementation of maintenance and repairs refers to the Minister of Transportation Regulation No. 60 of 2012. Problems were encountered in the field at the BH182 Daop 2 railway bridge in Bandung due to lowering structural strength. Therefore, it was necessary to repair the bridge module with a new bridge design. The purpose of this study is to analyse and to calculate strength of the structure and to determine effectiveness of the use of construction materials on 2 alternative bridge construction selection with the type of “I" girder and the type of “Warren" Truss. Design implementation method used is to utilize Midas Civil Structure software. The loading used for railway bridges is grouped into three load groups, namely the girder's self-weight, additional dead load, and live load. Additional dead load analysed is line load including bearings, while for live load is trainset load based on loading requirements. From the results of calculations between the steel bridge “I" girder type height of 300 cm and the type of “Warren" Truss height of 600 cm, each span of 30 m showed that those were a function of the railway bridge. It would be more effective to use the type of “Warren” Truss structure that is quite able to withstand train traffic loads in accordance with applicable standards.

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