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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 left-hand side of a section; and is positive if it acts anti-clockwise on the right-hand side of a section. Shear Force is positive if it acts downwards on the left-hand side of a section; and is positive if it acts upwards on the right-hand 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
- Force, shear force, maximum value