Tension and Compression in Trusses

The video tutorial explains how to determine whether truss members are under tension or compression without using math. It begins by defining tension and compression, then demonstrates the method by analyzing specific truss members, such as CD, CB, and BE. The tutorial also covers more complex trusses, emphasizing the importance of understanding how removing a member affects the truss structure. The video aims to help viewers visually assess truss behavior and identify tension and compression in various scenarios.

What does it mean when a truss member is under tension?

• The member is neither pushing nor pulling.

• The member is pushing on the joints.

• The member is pulling on the joints.

• The member is rotating around a pin.

What happens to the truss when member CD is removed?

• The right half of the truss rotates upward.

• The left half of the truss rotates downward.

• The truss collapses completely.

• The entire truss remains stable.

How can you tell if member CD is under compression?

• The distance between joints C and D increases.

• The distance between joints B and C decreases.

• The distance between joints C and D decreases.

• The distance between joints B and C increases.

What indicates that member BC is under tension?

• The distance between joints B and C increases.

• The distance between joints B and C decreases.

• The distance between joints B and C remains the same.

• The distance between joints C and D increases.

What happens to the truss when the top member DE is removed?

• The left half of the truss rotates upward.

• The right half of the truss rotates downward.

• The entire truss remains stable.

• The truss collapses completely.

How can you tell if the top member DE is under compression?

• The distance between joints D and E increases.

• The distance between joints D and E decreases.

• The distance between joints B and E decreases.

• The distance between joints B and E increases.

What is the most complex case discussed in the video?

• Member CD

• Member BC

• Member BE

• Member DE

What happens to the truss when member BE is removed?

• The right side of the truss collapses.

• The truss rotates around a pin.

• The left side of the truss collapses.

• The entire truss remains stable.

How can you tell if member BE is under tension?

• The distance between joints B and E decreases.

• The distance between joints B and E remains the same.

• The distance between joints B and E increases.

• The distance between joints D and E increases.

What is the key method used to determine tension or compression in a truss?

• Using mathematical calculations.

• Observing the truss's color change.

• Removing a member and observing the truss's behavior.

• Listening for sounds from the truss.