scholarly journals Effect of Cross-Frames on Load Distribution of Steel Bridges with Fractured Girder

2020 ◽  
Vol 5 (4) ◽  
pp. 32 ◽  
Author(s):  
Mohammad Abedin ◽  
Armin B. Mehrabi
Keyword(s):  
Load Distribution ◽  
Steel Plate ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges ◽  
Solution Methods ◽  
Profile Changes ◽  
Girder Bridge ◽  
The Impact ◽  
Sudden Collapse

In steel girder bridges, fracture of one girder may occur without noticeable bridge profile changes. It is critical to ensure that the bridge will have adequate capacity to prevent collapse until the next cycle of inspection discovers the damage. It is realized that once one of the bridge girders is fractured, vertical loads need to be distributed through an alternative path to the intact girder(s). In this case, cross-frames can play an important role in transferring the loads and preventing from sudden collapse. This paper investigates the impact of cross-frames on load distribution after a fracture is occurred in one girder. Bridge configurations with different cross-frame spacing were studied using finite element modeling and simulation of the bridge behavior with a fractured steel plate girder. Nonlinear and dynamic solution methods were used for these analyses. Results of this investigation demonstrated the important role cross-frames can play in providing some reserved capacity for the bridge with fractured girder to enhance the bridge redundancy. The contribution of the cross-frames and the behavior of the bridge after fracture in one girder however depends on the configuration of the bridge. A study of the variation of the effect of cross-frames with respect to the number of girders is also included in this paper.

Experimental Investigation on the Fatigue Strength of the Replacement Repair Welded Joints

2007 ◽  
Vol 345-346 ◽  
pp. 355-358
Author(s):  
Kyong Ho Chang ◽  
H.C. Park ◽  
Chin Hyung Lee ◽  
Gab Chul Jang ◽  
E.H. Choi
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
Steel Plate ◽  
Fatigue Tests ◽  
Steel Plates ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges ◽  
Flux Cored Arc Welding ◽  
Girder Bridge

In recent years, the replacement repair welding, which repairs damaged steel girder bridges by replacement of the damaged sections with new steel plates through cutting and welding under in-service conditions, is spotlighted for its brilliant features, i.e. it can be achieved without incurring traffic dislocation. However, the mechanical behavior of the welded joints under cyclic loads due to the traffic which passes along the girder bridges is not clarified. In this paper, the fatigue strength of the replacement repair welded joints was investigated in order to improve reliability in the repair welded joints. Steel plate was extracted from the old steel girder bridge; then was welded with new steel plate to construct specimen with the replacement repair welded joints. Flux Cored Arc Welding (FCAW) process was used to fabricate the double "V" butt joints. Fatigue tests were conducted using a servo hydraulic controlled 50tonf capacity UTM with a frequency of 5Hz under constant amplitude loading. The fatigue strength of the replacement repair welded joints was analyzed in detail.

Effect of Multilanes on Wheel Load Distribution in Steel Girder Bridges

1999 ◽  
Vol 4 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Mounir E. Mabsout ◽  
Kassim M. Tarhini ◽  
Gerald R. Frederick ◽  
Abbas Kesserwan
Keyword(s):  
Load Distribution ◽  
Wheel Load ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges

scholarly journals Evaluating Reserve Strength of Girder Bridges Due to Bridge Rail Load Shedding

2021 ◽  
Author(s):  
Yao Wang ◽  
Mirela D. Tumbeva ◽  
Ashley P. Thrall
Keyword(s):  
Prestressed Concrete ◽  
Numerical Models ◽  
Field Testing ◽  
Load Shedding ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges ◽  
Girder Bridge ◽  
Prestressed Concrete Girder Bridge ◽  
Reserve Strength

This research experimentally and numerically evaluated the reserve strength of girder bridges due to bridge rail load shedding. The investigation included: (1) performing non-destructive field testing on two steel girder bridges and one prestressed concrete girder bridge, (2) developing validated finite element numerical models, and (3) performing parametric numerical investigations using the validated numerical modeling approach. Measured data indicated that intact, integral, reinforced concrete rails participate in carrying live load. Research results culminated in recommendations to evaluate the reserve strength of girder bridges due to the participation of the rail, as well as recommendations for bridge inspectors for evaluating steel girder bridges subjected to vehicular collision.

Effect of Continuity on Wheel Load Distribution in Steel Girder Bridges

1998 ◽  
Vol 3 (3) ◽  
pp. 103-110 ◽  
Author(s):  
Mounir E. Mabsout ◽  
Kassim M. Tarhini ◽  
Gerald R. Frederick ◽  
Abbas Kesserwan
Keyword(s):  
Load Distribution ◽  
Wheel Load ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges

Influence of Sidewalks and Railings on Wheel Load Distribution in Steel Girder Bridges

1997 ◽  
Vol 2 (3) ◽  
pp. 88-96 ◽  
Author(s):  
Mounir E. Mabsout ◽  
Kassim M. Tarhini ◽  
Gerald R. Frederick ◽  
Marwan Kobrosly
Keyword(s):  
Load Distribution ◽  
Wheel Load ◽  
Steel Girder ◽  
Girder Bridges ◽  
Steel Girder Bridges

RESPONSE OF COMPOSITE STEEL PLATE GIRDER BRIDGES SUBJECTED TO DEBRIS FIRES

2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Amila Dissanayake ◽  
Srikanth Venkatesan ◽  
Sujeeva Setunge
Keyword(s):  
Research Work ◽  
Mechanical Analysis ◽  
Design Stage ◽  
Steel Girder ◽  
Girder Bridges ◽  
Modelling Framework ◽  
Steel Girder Bridges ◽  
Significant Damage ◽  
Prolonged Duration ◽  
The Impact

Bridge fires have been a serious concern for asset owners for decades. Considerable research work has been published on the assessment of bridges subjected to hydrocarbon fires and Wildland Urban Interfaces (WUI) fires like bushfires. However, the impact from fires that may have been generated due to onsite-accumulated debris, has been largely overlooked in the past. Prolonged duration of debris fires might well cause significant damage to the bridges, unless properly accounted during the design stage. The current study investigates the influence from debris-generated fires on steel girder bridges, using a reasonably validated advanced numerical modelling framework. Fire development was modelled first as a static, and then a travelling fire, using fire dynamic simulation (FDS) to capture the Adiabatic Surface Temperature (AST) development of the structure. The resulted AST was coupled with thermo-mechanical analysis using sequentially coupled thermo-mechanical analysis procedure in ABAQUS. The numerical model was used to estimate the temperature and displacement development of the bridge. The outcome from the study will facilitate asset managers for conducting necessary risk assessments incorporating the influence of onsite flammable debris for bridges.

scholarly journals Novel Approaches for Fracture Detection in Steel Girder Bridges

2019 ◽  
Vol 4 (3) ◽  
pp. 42 ◽  
Author(s):  
Mohammad Abedin ◽  
Armin B. Mehrabi
Keyword(s):  
Steel Plate ◽  
Distinct Pattern ◽  
Fracture Detection ◽  
Girder Bridges ◽  
Steel Girder Bridges ◽  
Periodic Monitoring ◽  
Self Powered ◽  
Girder Bridge ◽  
Contact Sensors ◽  
Plate Girder

The bottom flanges of steel plate girder bridges can be considered fracture-critical elements depending on the number of girders and bridge configuration. For such cases, it is required that inspection of these bridges be carried out using costly “arms-length” approach. New techniques in structural health monitoring (SHM) that use non-contact sensors and self-powered wireless sensors present alternative approach for inspection. Application of such techniques would allow timely detection and application of repair and strengthening, in other word, providing for more resilient bridges. This paper investigates the feasibility of using a handful of self-powered wireless or non-contact sensors for continuous or periodic monitoring and detection of fracture in steel plate girder bridges. To validate this concept, vibration measurements were performed on an actual bridge in the field, and detailed finite element analyses were carried out on a multi-girder bridge. The records obtained show that vibration amplitude was significantly increased for fractured girder, and a distinct pattern of strain variation was registered in the vicinity of fracture, all of which can be detected effectively with relevant sensors. Moreover, the amplitude and frequency of the vibration was shown to be significant enough for providing the required power for typical sensor(s).

Sign in / Sign up

Export Citation Format

Share Document