00820971

Component

https://doi.org/10.3141/1770-08

http://scholar.google.com...inch&publication_year=2001

Results of a diagnostic load test and in-service monitoring of a steel through-girder bridge are presented. The bridge currently has a low load rating that is controlled by the flexural capacity of the steel deck trough. The diagnostic load test was conducted using the regularly scheduled transit trains, with no interruption to the daily service. A total of 16 strain transducers were mounted to the bridge girders and trough; five dynamic train passes were recorded. The largest tensile and compressive stresses recorded in the edge girder were 33.5 MPa and 23.4 MPa, respectively; the largest tensile and compressive stresses in the deck trough were 25.9 MPa and 27.9 MPa, respectively. The test results showed the effective width of the deck trough to be 2.89 m for a single axle and 5.19 m for a 2.74-m spaced axle pair. An in-service monitoring system was also placed on the bridge to record the stress cycles experienced by the bridge over a 1-week period. During the in-service monitoring period, 163 trains crossed the bridge with an associated 1,456 axles. The mean peak tensile stress in the deck trough caused by locomotives crossing the bridge was 26 MPa with a standard deviation of 1.8 MPa. The test results showed that the peak deck trough strains due to live load were only 15% of the computed values used in the rating. As a result, the bridge load rating can safely be increased, and the current speed restrictions can be lifted.

This paper appears in Transportation Research Record No. 1770, Design of Structures 2001.

English

p. 51-57

2001

Transportation Research Record

0309072328

Figures (7) ; Photos (1) ; References (1) ; Tables (1)

Axles; Compression; Diagnostic tests; Girder bridges; Load factor; Load tests; Locomotives; Rail transit; Railroad bridges; Speed limits; Strain (Mechanics); Stresses; Tension

In-service testing

Bridges and other structures; Highways; Public Transportation; Vehicles and Equipment

TRIS, TRB, ATRI

Dec 6 2001 12:00AM

• BRIDGE SAFETY MONITORING USING COUPLED CURRENT DEVICE IMAGES
• COMPARATIVE STUDY OF AASHTO LOAD AND RESISTANCE FACTOR DESIGN DISTRIBUTION FACTORS FOR SLAB-GIRDER BRIDGES
• CONCRETE BRIDGE DECKS REINFORCED WITH FIBER-REINFORCED POLYMER BARS (WITH DISCUSSION AND CLOSURE)
• DEBRIS FLOW SIMULATION FOR HIGHWAY CROSS CULVERTS
• DESIGN OF PROFILE WALL THERMOPLASTIC PIPE FOR LOCAL BUCKLING (WITH DISCUSSION AND CLOSURE)
• DESIGN OF ROUTE 895 BRIDGE OVER JAMES RIVER IN VIRGINIA
• DYNAMIC LOADING OF BRIDGES
• EFFECT OF BEARING STIFFNESS AND SKEW ANGLE ON PERFORMANCE OF PRECAST CONCRETE BRIDGE
• EFFECTIVE USE OF PUBLIC INVOLVEMENT TO ACHIEVE AESTHETIC QUALITY IN BRIDGE DESIGN
• ESCAPE ADITS FOR TUNNEL SAFETY
• EXPERIMENTAL AND NUMERICAL EVALUATION OF BRACED-CHAIN EYEBAR BRIDGE
• EXPERIMENTAL CHARACTERIZATION OF METALLIC DAMPERS FOR SEISMIC RETROFIT OF HIGHWAY BRIDGES
• FATIGUE ASSESSMENT OF TRAFFIC SIGNAL MAST ARMS BASED ON FIELD TEST DATA UNDER NATURAL WIND GUSTS
• FIELD INVESTIGATION OF HIGH-PERFORMANCE CONCRETE BRIDGE DECKS IN SOUTH CAROLINA
• FIELD STUDIES OF STRENGTHENED TIMBER RAILROAD BRIDGE
• HEALTH MONITORING OF IRONTON-RUSSELL BRIDGE FOR RATING PURPOSES
• LONG-TERM DURABILITY OF STRUCTURAL COMPOSITE LUMBER IN BRIDGE APPLICATIONS
• PERFORMANCE IN LIEU OF PRESCRIPTION IN BRIDGE DESIGN: CHANGI AIRPORT MEZZANINE BRIDGE, SINGAPORE
• PERFORMANCE OF FIVE-SPAN STEEL BRIDGE WITH FIBER-REINFORCED POLYMER COMPOSITE DECK PANELS
• PERFORMANCE OF GLASS FIBER-REINFORCED POLYMER DECK ON STEEL GIRDER BRIDGE
• PUBLIC PARTICIPATION AND BRIDGE TYPE SELECTION
• REPAIR AND STRENGTHENING OF CONCRETE STRUCTURES THROUGH APPLICATION OF CORRECTIVE POSTTENSIONING FORCES WITH SHAPE MEMORY ALLOYS
• RETROFITTING TO CORRECT UPLIFT OF CURVED GIRDER BRIDGE THROUGH FIELD TESTING AND ANALYSIS
• SOIL PRESSURE MEASURED AT VARIOUS FILL HEIGHTS ABOVE DEEPLY BURIED THERMOPLASTIC PIPE
• SUPERSTRUCTURE FLEXIBILITY AND DISINTEGRATION OF REINFORCED CONCRETE DECK SLABS: AN LRFD PERSPECTIVE
• TIME-DEPENDENT DEFLECTION OF THERMOPLASTIC PIPES UNDER DEEP BURIAL
• ULTRASONIC INSPECTION OF GLUED LAMINATED TIMBER FABRICATED WITH DEFECTS
• UPDATE ON ANALYTICAL AND EXPERIMENTAL RESEARCH ON BRIDGE RESTRAINERS
• VIRTUAL REALITY IMAGES TO AID PUBLIC INVOLVEMENT IN APPEARANCE OF ROADS AND BRIDGES