ch6_4_student_notes

ch6_4_student_notes - Greenville Bridge, Wayne County,...

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Greenville Bridge, Wayne County, Missouri
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Commodore John Barry Bridge – Delawere River Chester, Pensilvania Main Span: 1644 ft
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TRUSSES–THE METHOD OF SECTIONS (Section 6.4) Today’s Objectives : Determine forces in truss members using the method of sections. In-Class Activities : Applications Method of sections Problems and Questions
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APPLICATIONS Long trusses are often used to construct bridges. The method of joints requires that many joints be analyzed before we can determine the forces in the middle part of the truss. The method of sections can be used to determine the forces in members directly.
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In the method of sections, a truss is divided into two parts by taking an imaginary “cut” (shown here as a-a) through the truss. Since truss members are subjected to only tensile or compressive forces along their length, the internal forces at the cut member will also be either tensile or compressive with the same magnitude. This result is based on the
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This note was uploaded on 12/06/2010 for the course CHEM 141 taught by Professor Freeman during the Spring '10 term at Columbia SC.

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ch6_4_student_notes - Greenville Bridge, Wayne County,...

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