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Unformatted text preview: UNIT 5  SUM MARY BENDING MOMEN T AND SHEAR FORCE  1 Figure 5.4 Figure 5.3 Figure 5.13 CIV 134 Theory of Structures A Summary Sheet Unit 5 Bending Moment and Shear Force Definitions Bending Moment: The bending moment at a section of a beam is the sum of the moments about that section of ALL the forces to the right or to the left of the section. Shear Force: The shear force at a section of a beam is the sum of the components resolved parallel to the section of ALL the forces to the right or to the left of the section. Sign Conventions Right hand system Bending Moment is positive if it acts clockwise on the lefthand side of a section; and is positive if it acts anticlockwise on the righthand side of a section. Shear Force is positive if it acts downwards on the lefthand side of a section; and is positive if it acts upwards on the righthand side of a section. A bending moment diagram is a diagram which indicates the value of bending moment at all points along the length of a structural member due to a given system of...
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 Spring '10
 y.bahie
 Force, shear force, maximum value

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