Abstract:
EIGHT VEHICLES, RANGING FROM A TWO-AXLE 27,830-LB. TRUCK TO A FIVE-AXLE 150,000-LB. TANK TRANSPORTER WERE USED IN TESTING A LOW TRUSS BRIDGE OF 110 FT. 8 IN. SPAN AT FORT LOUDON, PENNSYLVANIA. DURING EACH PASSAGE OF A TEST VEHICLE OVER THE STRUCTURE, 24 SIMULTANEOUS STRAINS WERE RECORDED WITH ELECTROMAGNETIC GAGES. FIGURES ARE PRESENTED FOR TYPICAL TRUSS MEMBERS, SHOWING STATIC STRESSES, IMPACT STRESSES AND SECONDARY STRESSES. DATA ARE PRESENTED ON VERTICAL AND HORIZONTAL TRUSS DEFLECTIONS AND STRESSES IN THE FLOOR SYSTEM ARE DISCUSSED. VEHICLE SPEEDS VARIED FROM 5 TO 50 MPH. WHILE THESE DATA APPLY ONLY TO THE PARTICULAR BRIDGE TESTED, IT IS BELIEVED THAT THE RESULTS WILL HAVE SOME BEARING ON THE DESIGN OF HIGHWAY BRIDGES IN GENERAL. /AUTHOR/
Supplemental Notes:
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