Trusses | Structural Analysis - Civil Engineering (CE) PDF Download

 Page 1


Truss
2
Page 2


Truss
2
Definition of a Truss
• A truss is an assembly of straight members 
connected at joints.  No member is continuous 
through a joint.
• Bolted or welded connections are assumed to be 
pinned together.  Forces acting at the member ends 
reduce to a single force and no couple.  Only two-
force members are considered.
• Most structures are made of several trusses joined 
together to form a space framework.  Each truss 
carries those loads which act in its plane and may be 
treated as a two-dimensional structure.
• When forces tend to pull the member apart, it is in 
tension.  When the forces tend to compress the 
member, it is in compression.
3
Page 3


Truss
2
Definition of a Truss
• A truss is an assembly of straight members 
connected at joints.  No member is continuous 
through a joint.
• Bolted or welded connections are assumed to be 
pinned together.  Forces acting at the member ends 
reduce to a single force and no couple.  Only two-
force members are considered.
• Most structures are made of several trusses joined 
together to form a space framework.  Each truss 
carries those loads which act in its plane and may be 
treated as a two-dimensional structure.
• When forces tend to pull the member apart, it is in 
tension.  When the forces tend to compress the 
member, it is in compression.
3
Definition of a Truss
Members of a truss are slender and not capable of supporting large 
lateral loads.  Loads must be applied at the joints. 
• Weights are assumed to be distributed to joints. 
• External distributed loads transferred to joints via stringers and 
floor beams. 4
Page 4


Truss
2
Definition of a Truss
• A truss is an assembly of straight members 
connected at joints.  No member is continuous 
through a joint.
• Bolted or welded connections are assumed to be 
pinned together.  Forces acting at the member ends 
reduce to a single force and no couple.  Only two-
force members are considered.
• Most structures are made of several trusses joined 
together to form a space framework.  Each truss 
carries those loads which act in its plane and may be 
treated as a two-dimensional structure.
• When forces tend to pull the member apart, it is in 
tension.  When the forces tend to compress the 
member, it is in compression.
3
Definition of a Truss
Members of a truss are slender and not capable of supporting large 
lateral loads.  Loads must be applied at the joints. 
• Weights are assumed to be distributed to joints. 
• External distributed loads transferred to joints via stringers and 
floor beams. 4
Definition of a Truss
5
Page 5


Truss
2
Definition of a Truss
• A truss is an assembly of straight members 
connected at joints.  No member is continuous 
through a joint.
• Bolted or welded connections are assumed to be 
pinned together.  Forces acting at the member ends 
reduce to a single force and no couple.  Only two-
force members are considered.
• Most structures are made of several trusses joined 
together to form a space framework.  Each truss 
carries those loads which act in its plane and may be 
treated as a two-dimensional structure.
• When forces tend to pull the member apart, it is in 
tension.  When the forces tend to compress the 
member, it is in compression.
3
Definition of a Truss
Members of a truss are slender and not capable of supporting large 
lateral loads.  Loads must be applied at the joints. 
• Weights are assumed to be distributed to joints. 
• External distributed loads transferred to joints via stringers and 
floor beams. 4
Definition of a Truss
5
Definition of a Truss
6