# Lecture 17 - ENGR-1100 Introduction to Engineering Analysis...

This preview shows pages 1–9. Sign up to view the full content.

ENGR-1100 Introduction to Engineering Analysis Lecture 17 Notes courtesy of: Prof. Yoav Peles

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Homework Assignment (due next class) Problem 7-40 Problem 7-49 Problem 7-61
Today Lecture outline Trusses analysis- method of section.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Two important structures types Trusses: Structures composed entirely of two force members. Frames: Structures containing at least one member acted on by forces at three or more points.
Stability criteria (2D) m+3=2j 2j- number of equations to be solved. m- number of members. 3- number of support reactions m+3<2j Truss unstable m+3>2j Statically indeterminate

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Method of joints Separate free-body diagrams for: each member each pin Equilibrium equations for each pin (concurrent forces): Σ F=0 no moment equation
Example 7-16 Determine the forces in members BC, CD, and DF of the truss shown in fig. P7-16

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Solution From a free-body diagram for the complete truss: M A = E y (8) - 10 (4) - 8 (6) = 0 E y = 11 kN = 11 kN M=9 j=6 M=2j-3 F y = T DE sin 30 ° + 11 = 0 DE From a free-body joint E:
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 18

Lecture 17 - ENGR-1100 Introduction to Engineering Analysis...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online