The document discusses the analysis of statically determinate trusses. It describes the characteristics of determinate trusses, including their slender members, pinned/bolted/welded joints, and loads acting at joints with members in tension or compression. It also discusses terminology and selection criteria for different types of trusses used in roofs and bridges. The document outlines the assumptions and methods for analyzing trusses, including the method of joints and method of sections.

1. ECIV 320 Structural Analysis I Analysis of Statically Determinate Trusses

5. Analysis of Determinate Trusses

6. Analysis of Determinate Trusses

7. Analysis of Determinate Trusses

8. Roof Trusses - Terminology Supports Wood/Steel/RC Columns Masonry Walls Bent: Roof Truss and Supporting Columns

9. Roof Trusses - Selection Short Spans (<60 ft) Requiring Overhead Clearance

10. Roof Trusses - Selection Moderate Spans (60-100 ft) May be modified for flat roofs

11. Roof Trusses - Selection Larger Spans (>100 ft) May have cambered bottom chord

12. Roof Trusses - Selection Suitable for flat or nearly flat roofs

13. Roof Trusses - Selection Location of column not an issue Uniform lighting is important

14. Roof Trusses - Selection Garages and small airplane hangars

15. Roof Trusses - Selection High rises and long spans Field houses Gymnasiums etc

16. Bridge Trusses - Terminology

17. Bridge Trusses - Selection Spans <200ft

19. Bridge Trusses - Selection Longer Spans Subdivided Trusses K-Truss

20. OK 99 Pond Creek Bridge, Osage County

21. Warren Truss Bridge

25. Classification of Coplanar Trusses SIMPLE TRUSS - Triangles

26. Classification of Coplanar Trusses COMPOUND

27. Classification of Coplanar Trusses

28. Determinacy No of Bars + No of Reactions = 2(no of Joints) b + r = 2j -> Determinate

29. Determinacy

30. Stability External Stability All reactions parallel or Concurrent => Unstable

31. Stability Internal Stability Joints do not exhibit rigid motion Simple truss always stable

33. Method of Joints Truss in Equilibrium => Each Joint in Equilibrium

36. Zero-Force Members

37. Zero-Force Members

38. Zero-Force Members

39. Method of Sections Truss in Equilibrium => Each PART in Equilibrium

40. Method of Sections Truss in Equilibrium => Each PART in Equilibrium Efficient when forces of only a few members are to be found

44. Method of Sections – Procedure (cont’d) Equations of Equilibrium Take moments about a point that lies on the intersection of the lines of action of two unknown forces