QUICK DETERMINATION ACCORDING TO THE SECOND ORDER THEORY OF BENDING MOMENTS AND SHEAR FORCES ENVELOPES IN STIFFENING TRUSSES
MANY ENGINEERS HAVE TRIED TO USE INFLUENCE LINES TO CALCULATE BY THE DEFLECTION THEORY, THE EXTREME VALUES OF BENDING MOMENTS AND SHEARING FORCES IN THE HINGED STIFFENING BEAMS OF A SUSPENSION BRIDGE. IN THIS PAPER, THE WRITER GIVES A GENERAL METHOD TO CALCULATE THOSE VALUES, BOTH IN SIDE SPANS AND IN MAIN SPAN, WHICH DISREGARDS THE APPROXIMATIONS AND GENERALIZES THE METHOD PROPOSED BY PEERG IN 1956. ESSENTIALLY, IT CONSISTS OF MAKING USE OF A SPECIAL NUMERICAL TABLE AND OF NUMEROUS GRAPHS TO DETERMINE THE LOADING CONDITIONS AND THEN THE MAXIMUM AND MINIMUM REQUIRED VALUES. ONLY THE FRIST PART IS ITERATIVE, BUT THE PROCESS IS VERY FASTLY CONVERGING AND GIVES THE VALUE OF A CORRECTION FACTOR INCLUDING THE RELATIVE PROPERTIES OF THE SPANS AND THE SUPPORTING CABLE, VARYING BETWEEN 1 AND 1.50 FOR THE MAIN SPAN, AND BEING MUCH GREATER THAN 2 FOR A SIDE SPAN. ALL CALCULATIONS CAN BE PERFORMED WITH A SLIDE RULE. /RRL/A/
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Supplemental Notes:
- Paper No 21, 12 PP, 4 FIG, 10 REF
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Authors:
- Cote, A G
- Publication Date: 1966-11
Media Info
Subject/Index Terms
- TRT Terms: Beams; Bending moments; Deflection; Hinged structures; Information processing; Load factor; Shear stress; Stiffness; Suspension bridges; Tables (Data); Theory
- Uncontrolled Terms: Shear forces
- Old TRIS Terms: Computing
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00208584
- Record Type: Publication
- Source Agency: Road Research Laboratory /UK
- Files: TRIS
- Created Date: Sep 18 1994 12:00AM