TOPIC 1B

Question 1

Is a conceptual tool used in structural engineering to represent the internal forces and moments developed within a structural member in response to applied loads.

Answer 1

Design Stress Resultant

Question 1

Are crucial for determining whether a structure can safely withstand the applied loads without failure.

Answer 1

Design Stress Resultant

Question 2

Describe how a structure responds to external
forces by summarizing the stresses over a given section of the member.

Answer 2

Design Stress Resultant

Question 3

The force acting along the longitudinal axis of a
member. It can be tensile (pulling apart) or compressive (pushing together).

Answer 3

Axial Force (N)

Question 4

The force acting perpendicular to the axis of the member. It tends to cause sliding or shearing between different parts of the section.

Answer 4

Shear Force (V)

Question 5

The rotational force or torque applied to a
member that causes it to bend. It is the result of forces that cause a member to rotate or flex about a certain axis.

Answer 5

Bending Moment (M)

Question 6

The moment that causes twisting about the
longitudinal axis of a structural member. This is important in circular or cylindrical sections.

Answer 6

Torsional Moment (T)

Question 7

The resultant stress acting normal
(perpendicular) to the surface of a structural element, combining effects of axial force and bending moments.

Answer 7

Normal Stress Resultant (σ)

Question 8

The stress caused by shear forces acting
parallel to the surface of a material.

Answer 8

Shear Stress Resultant (τ)