00209906

Component

http://onlinepubs.trb.org...s/hrr/1973/428/428-006.pdf

THE FINDINGS OF AN ANALYTICAL STUDY ON THE DETERMINATION OF VEHICLE-INDUCED DYNAMIC RESPONSE OF HIGHWAY BRIDGE SUPERSTRUCTURES ARE PRESENTED. THE INVESTIGATION UTILIZED THE FINITE ELEMENT DISPLACEMENT APPROACH. IN CONTRAST TO THE TRADITIONAL ONE- DIMENSIONAL MODELING, WHICH ASSUMES THE SUPERSTRUCTURE TO BE A SINGLE BEAM, THE SUPERSTRUCTURE IS HERE ASSUMED TO BE TWO-DIMENSIONAL, A COMPOSITION OF DISCRETE BEAM AND SLAB ELEMENTS. THE REPORTED INVESTIGATION WAS CARRIED OUT FOR A SIMPLE SUPPORTED BRIDGE SUPERSTRUCTURE WITH A 71 1/2-FT SPAN LENGTH AND NO SKEW. THE SYSTEM CONSISTS OF SIX 24/45 PRESTRESSED CONCRETE I-BEAMS AND A 7 1/2-IN. THICK CONCRETE DECK. AN AASHO HS20-44 DESIGN VEHICLE WAS SIMULATED BY USING A CONSTANT FORCE SYSTEM IN THE DYNAMIC ANALYSIS. DAMPING WAS NEGLECTED, AND THE BRIDGE SURFACE WAS ASSUMED TO BE FREE OF IMPERFECTIONS. NUMERICAL STUDIES WERE CARRIED OUT FOR VARIOUS LANE LOADINGS AND VARIOUS VEHICULAR SPEEDS. DEFLECTION AND BENDING MOMENT TIME HISTORIES FOR BEAMS AND DEFLECTION CONTOUR GRAPHS FOR THE DECK SLAB CORRESPONDING TO THE 50-MPH VEHICULAR SPEED ARE PROVIDED. ANALYTICAL RESULTS WERE COMPARED WITH THE DATA OBTAINED FROM FIELD TESTS PERFORMED ON THE ACTUAL BRIDGE. A GOOD CORRELATION WAS OBSERVED. THIS PAPER DOES NOT INCLUDE THE EXPERIMENTAL STUDY, WHICH IS PRESENTED IN ANOTHER PUBLICATION. CONCLUSIONS WERE DRAWN AND REPORTED BASED ON THIS INVESTIGATION. /AUTHOR/

Sponsored by Committee on Dynamics and Field Testing of Bridges. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01410344

pp 57-63

1973

Highway Research Record

52nd Annual Meeting of the Highway Research Board

030902157X

Digital/other

Figures (10) ; References (6) ; Tables (2)

Analysis; Beams; Bridge superstructures; Dynamic loads; Field tests; Finite element method; Prestressed concrete; Prestressing; Studies

American Association of State Highway Officials

Dynamic response

Bridges and other structures; Highways

TRIS, TRB

Aug 5 1973 12:00AM

• COMPARISON OF BRIDGE STRESS HISTORY RESULTS WITH DESIGN- RELATED ANALYSES
• LOADING HISTORY OF SPAN 10 ON YELLOW MILL POND VIADUCT
• METHODOLOGY FOR EVALUATING THE AESTHETIC APPEAL OF BRIDGE DESIGNS
• REINFORCING REQUIREMENTS FOR CONCRETE BEAMS WITH LARGE WEB OPENINGS
• STUDY OF AASHO LOADINGS ON A CONCRETE BOX GIRDER BRIDGE MODEL
• TIME-DEPENDENT BEHAVIOR OF HAWAIIAN AGGREGATE CONCRETE TO REPEATED LOADINGS