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Continuous Prismatic Beams
section The Propped Cantilever Twospan Continuous Beam with
flence Lines for Shear Forces and Reactions when Support Moment
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actual stiffnesses analysis angular applied arbitrary sway arch rib axial force Beam Structures bending moment diagram calculation carry-over factor chord member circular segmental column head condition conjugate beam constant continuous beam corresponding cross-section deflected form deflexion curve deformations determine the influence displacement elastic centre elastic weights end couples end rotations equal evaluated Example fictitious loads fixed arch flexural flexural rigidity frame given in Table haunch Hence influence coefficients interposed hinge joint rotations length line for bending line for H line for shear line is shown linear linear elastic lower chord member forces midspan non-prismatic member numerics obtained ordinates panel point primary structure reciprocal theorem required influence line shear force shown in fig side span sidesway simple beam slope deflexion equations statically indeterminate stiffening girder substituting eqns superposition suspension bridge symmetrical unit couple unit influence load unit load Young's modulus zero