h Flashcards
It is a structure that is made of straight slender bars that are joined together at their ends by frictionless pins to form a pattern of triangle. The loads act only at joints and not on the members.
Truss
Thus, every member of truss is identified as?
two-force member
These are usually designed to transmit forces over relatively long spans, common examples being bridge trusses, roof trusses, transmission towers, etc.
Trusses
Common Types of Trusses
King post truss
Simple fink truss
Fink truss
Howe truss
Pratt truss
Fan Truss
Single span fink truss
Clipped truss
Rigid frame open-web clear span truss
Rigid frame clear span
Single span slope beam
Continuous Seam
A pin jointed truss which has got just sufficient number of members to resist the load without undergoing any deformation in shape is called a?
Perfect Truss
It is the simplest perfect truss and has three joints and three members.
It may be observed that to increase one joint in a perfect truss two more members are required.
Triangular frame
A truss which does not satisfies the relation m
= 2j - r is called an?
Imperfect Truss
A truss which satisfies the relation m < 2j - r deficient truss. It is unstable and may collapse under external forces.
Imperfect Deficient Truss
A truss which satisfies the relation m > 2j - r is called a BLANK. It is over rigid truss. It cannot be completely analyzed by static equilibrium condition. Therefore, it is an indeterminate structure.
Imperfect Redundant Truss:
TWO common techniques for computing the internal forces in a truss are
Method of joints
Method of sections
It is represented by an arrow drawn away from the pin.
Tensile force
It is represented by an arrow drawn towards the pin.
Compressive force
