Graphical Method for the Analysis of Bridge Trusses: Extended to Continuous Girders and Draw SpansJ. Wiley, 1877 - 79 Seiten |
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abutment area moments beam or truss bending moment bending moments bottom chord centre of gravity centre pier centre vertical change of inclination Clapeyron's formula compression construction continuous girder cord curve diagonal diagram for shearing direction divide dotted line draw span Draw verticals equal equations feet figure find the stresses fully loaded horizontal distance horizontal line horizontal stress inclined chord line for shearing line parallel load advances load extends load line maxima stresses ment middle moment curve moving load obtained ordinates P₁ panel joint parabolic segment parallel chords PIVOT BRIDGES plane of section points of contra-flexure points of support polygon portion pressure proportional readily represented rolling load shearing diagram shearing force shearing stress shown side similar triangles single span spans are fully stress diagram supporting force tangent tension tion top chord travelling load triangle unloaded upward vertical line W₁ weight