00781477

Component

https://doi.org/10.3141/1688-06

http://scholar.google.com...glas&publication_year=1999

An experimental study to evaluate the fatigue strength of double-angle connections used to connect stringers to floor beams in steel railroad bridges is described. The tests examined connections that could be used for either new construction or replacement of old, damaged connections. Double-angle connections are always assumed to be subjected only to shear stresses. But, in reality, some bending moment also is developed by this type of connection, causing additional flexural stresses, which, in turn, can produce fatigue damage by exceeding the constant amplitude fatigue limit. The amount of the transferred moment was estimated in the tests. Two full-scale specimens were built, representing the stringer-to-floor beam connection of a one-span, open-deck, through-plate girder bridge located in Nevada, typical of construction in the early 1900s. The specimens were tested under a cyclic loading of +/- 195.8 kN, representing the equivalent load, which produces a total maximum shear reaction at the connection equal to the one produced in the actual bridge. However, the load cycles were from 0 to 391.6 kN in real bridges. The specimens also were tested beyond the fatigue initiation to observe the crack-propagation patterns and their growth rate. The tested specimens were modeled by the finite element program ADINA, and a comparison between the analytical and experimental results was made.

This paper appears in Transportation Research Record No. 1688, Various Bridge Design Issues.

English

p. 46-52

1999

Transportation Research Record

030907116X

Figures (9) ; Photos (3) ; References (12) ; Tables (1)

Bending moments; Cracking; Cyclic tests; Fatigue (Mechanics); Fatigue tests; Finite element method; Flexure; Girder bridges; Historic bridges; Railroad bridges; Repeated loads; Shear stress; Specimens; Steel

Adina (Computer program)

Crack growth rate; Crack propagation; Double-angle connections

Nevada

Bridges and other structures; Design; Highways; Materials; Railroads; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Jan 14 2000 12:00AM

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• CRACKING OF CONCRETE DECKS AND OTHER PROBLEMS WITH INTEGRAL-TYPE BRIDGES
• CYCLIC TESTING OF STEEL-LATTICED MEMBERS FOR THE SAN FRANCISCO-OAKLAND BAY BRIDGE
• EVALUATION OF ANALYSIS METHODS FOR ASSESSING SEISMIC RESPONSE
• FATIGUE DESIGN OF MODULAR BRIDGE EXPANSION JOINTS
• ISSUES IN SUPERLOAD CROSSING OF THREE STEEL STRINGER BRIDGES IN TOLEDO, OHIO
• JOINTLESS BRIDGES AND BRIDGE DECK JOINTS IN WASHINGTON STATE
• LARGE STUDS FOR COMPOSITE ACTION IN STEEL BRIDGE GIRDERS
• LONG-TERM PERFORMANCE OF ELASTOMERIC BRIDGE BEARINGS
• PROBABILISTIC ADVANCING CROSS-DIAGNOSIS FOR BRIDGE STRUCTURES BY USING COHERENT LASER RADAR
• SEISMIC RETROFIT OF THE NORTH APPROACH VIADUCT OF THE GOLDEN GATE BRIDGE
• SIMPLIFIED METHOD FOR SHEAR DESIGN BASED ON AASHTO LOAD AND RESISTANCE FACTOR DESIGN SPECIFICATIONS
• SIMPLIFIED METHOD FOR SHEAR DESIGN OF PRESTRESSED CONCRETE GIRDERS
• SIMPLIFIED NONLINEAR MODELING FOR SEISMIC ASSESSMENT OF COMPLEX BRIDGES
• STEEL ORTHOTROPIC DECKS: DEVELOPMENTS IN THE 1990S
• SUBJECTIVE AND OBJECTIVE EVALUATIONS OF BRIDGE DAMAGE
• TRANSVERSE CRACKING IN CONCRETE BRIDGE DECKS
• VERIFICATION OF GIRDER-DISTRIBUTION FACTORS FOR SHORT-SPAN STEEL GIRDER BRIDGES BY FIELD TESTING
• WHY THE AASHTO LOAD AND RESISTANCE FACTOR DESIGN SPECIFICATIONS?