STATICS OF RIGID BODIES - MIDTERMS

The members are subject only to axial compression or tension forces (no bending).

• Web members

• Bottom chords

• Top chords

• Roof trusses

A ______ _______which has the top chord parallel to the bottom chord over the entire length of the truss.

• Flat truss

• K-truss

• Pratt Bottom chord

• Roof truss

Made of straight, slender bars designed to transmit forces over relatively long spans.

• truss

• beam

• shear

• moment

All joints are pins.

• True

• False

In analyzing the trusses, we assume that the weights of the members are negligible.

• True, because truss are classified as lightweight structure.

• True, because the weight of the members is generally larger than the loads.

• False, because truss may fail in bending when subjected to loads applied at locations other than the joints

• Sometimes true.

The applied forces act at the sections.

• False, because the members of a truss are slender, they may fail in bending when subjected to loads applied at locations other than the joints.

• True, because, trusses are designed so that the major applied loads act at truss sections.

Each member of a truss is a _____________.

• one force body

• two force body

• three force body

• concurrent force body

Compressive forces stretch the member, whereas tensile forces compress shorten it.

• True

• False

Internal forces always occur as equal and opposite pairs on the two faces of an internal cross section.

• True

• False

The two common techniques for computing the internal forces in a truss are the ____ and ____.

• Joints

• Sections

• Static Equations

• Equilibrium equations