TOPIC 4

Question 1

Types of Stress Resultants

Answer 1

• Axial Load
• Shear Force
• Bending Moment
• Torsion
• Normal Stress
• Shear Stress

Question 2

The force applied along the longitudinal axis of a structural member, causing tension or compression. It influences the elongation or shortening of the
member.

Answer 2

Axial Load

Question 3

A force that acts perpendicular to the axis of a member, causing
one section to slide relative to the adjacent section. It is critical in beams and affects horizontal planes.

Answer 3

Shear Force

Question 4

The moment that induces bending in a structural member. It
is the product of the force and the distance from a specific point, affecting how much the member bends.

Answer 4

Bending Moment

Question 5

A twisting action in structural elements caused by moments acting along the member’s longitudinal axis. It is significant in members subjected to
twisting loads.

Answer 5

Torsion

Question 6

Stress acting perpendicular to the cross-sectional area, derived
from axial loads or bending moments, and calculated as force divided by area.

Answer 6

Normal Stress

Question 7

Stress acting parallel to the cross-section, caused by shear forces or torsion. It plays a vital role in determining member strength and failure.

Answer 7

Shear Stress

Question 8

Determining Design Stress Resultant Process

Answer 8

1. Load Identification
   
   • Dead Loads
   • Live Loads
   • Environmental Loads
2. Structural Model
   
   • Idealizing the Structure
   • Defining boundary conditions
   • Determining material
     properties
3. Structural Analysis
   
   • Calculating Support Reactions
   • Identifying Internal Forces
4. Design Stress Resultants
5. Load Factors and Safety
   Verification of Structural Capacity

Question 9

Application of Stress Resultant

Answer 9

• Design and Safety Checks
• Structural Analysis
• Failure Analysis
• Optimization

Question 10

Ensure that structural elements can safely resist the applied loads without exceeding material strengths or causing unacceptable deformations.

Answer 10

Design and Safety Checks

Question 11

Evaluate the behavior of structures under various load conditions and identify critical regions where stress resultants are maximized.

Answer 11

Structural Analysis

Question 12

Assess potential failure modes such as buckling, shear failure, and bending failure, based on the calculated stress resultants.

Answer 12

Failure Analysis

Question 13

Optimize the design of structural elements by analyzing stress resultants to reduce material usage while maintaining safety and performance.

Answer 13

Optimization