Structural Mechanics Lecture 2

<p>Residual deformation (D)</p> Signup and view all the answers

<p>Internal force divided by cross-sectional area (B)</p> Signup and view all the answers

<p>Axial, shear, and bending moment diagrams (D)</p> Signup and view all the answers

<p>Maximum strength of the element is reached (B)</p> Signup and view all the answers

<p>Deformation is measured as the integral of elongation over length (A)</p> Signup and view all the answers

<p>The force times the distance from the line of action to the point (A)</p> Signup and view all the answers

<p>When the sum of the moments at a point is zero (D)</p> Signup and view all the answers

<p>Forces that act in the same plane (A)</p> Signup and view all the answers

<p>Rotation cannot occur (B)</p> Signup and view all the answers

<p>By vector addition (B)</p> Signup and view all the answers

<p>Normal forces (A)</p> Signup and view all the answers

<p>-ve sign (B)</p> Signup and view all the answers

<p>The surface or tangent to the surface (C)</p> Signup and view all the answers

<p>Limiting deflection and excessive vibration under normal loading (D)</p> Signup and view all the answers

<p>Weight = Mass x Acceleration (D)</p> Signup and view all the answers

<p>Building social networks (B)</p> Signup and view all the answers

<p>The study of bodies at rest and not in motion (A)</p> Signup and view all the answers

<p>Understanding the loads acting on a structure (D)</p> Signup and view all the answers

<p>Weight as the push against an object (B)</p> Signup and view all the answers

<p>Interpreting the analysis results and choosing materials (C)</p> Signup and view all the answers

<p>Arrows (C)</p> Signup and view all the answers

<p>Weight of the structure (C)</p> Signup and view all the answers

<p>An assortment of elements that transfer loads (B)</p> Signup and view all the answers

<p>Wind gusts (A)</p> Signup and view all the answers

<p>To visualize the forces acting on a structure (D)</p> Signup and view all the answers

<p>Static loads do not vary with time (C)</p> Signup and view all the answers

<p>Weight of building materials (A)</p> Signup and view all the answers

<p>Functionality for specific use (A)</p> Signup and view all the answers

<p>Moment forces (C)</p> Signup and view all the answers

<p>The sum of all applied forces must equal zero. (D)</p> Signup and view all the answers

<p>ΣFx = 0, ΣFy = 0, ΣMz = 0 (C)</p> Signup and view all the answers

<p>Force depends on the product of mass and acceleration. (C)</p> Signup and view all the answers

<p>A moment is measured at a point and is related to the force applied and its distance from that point. (D)</p> Signup and view all the answers

<p>It can be analyzed using equations of equilibrium alone. (D)</p> Signup and view all the answers

<p>It contributes to the overall forces that must be balanced. (C)</p> Signup and view all the answers

<p>The sum of moments must be zero. (C)</p> Signup and view all the answers

<p>A lateral wind load pushing against the structure. (D)</p> Signup and view all the answers

A structure is a collection of interconnected elements designed to transfer loads between points.

Permanent loads are always present on a structure, like its own weight.

Live loads are temporary loads that are not always present, like people, vehicles, or wind.

Extreme loads are rare forces that cause significant stress on a structure, like earthquakes or tsunamis.

Static loads are constant forces that don't change over time, like the weight of a building.

Dynamic loads are forces that change over time, like wind gusts or earthquake shaking.

Structural engineers must design structures to perform their intended function while meeting safety requirements.

Structures should meet at least two performance objectives: functionality and safety. They must be effective and safe to use.

The ability of a structure to withstand extreme loads without collapsing, ensuring stability and sufficient strength.

The ability of a structure to function under normal use, minimizing excessive deflection and vibration.

A vector quantity representing both magnitude (size) and direction. It is measured in Newtons (N), where 1 N = 1 kg.m/s2.

The amount of matter in an object. It is measured in kilograms (kg).

The force of gravity acting on an object's mass. It is calculated by multiplying mass and acceleration due to gravity (g = 9.81 m/s2).

The study of objects at rest, not in motion. It involves understanding the forces acting on a stationary body.

A component of a structure, defined by its length, cross-section shape, and area. It can be of various shapes and sizes.

The area of a structural element's cross-section. It is important for determining the strength and load-carrying capacity of the element.

The tendency of a force to cause rotation around a point.

The state where the sum of all moments acting on an object equals zero.

Forces that act in the same plane.

Forces acting through the same point cannot cause rotation.

Forces that do not act through the same point can cause rotation.

Forces that act on the boundary of a structure, including applied forces and support reactions.

A force acting perpendicular to the cross-section of a structural element.

A force acting parallel to the surface of a structural element.

A body at rest where the sum of all forces acting on it equals zero. This means the body is not moving or accelerating.

A force that tends to cause rotation around a point.

A force that acts along the axis of a structural element, either pulling it apart or pushing it together.

The distance from the point of rotation to the point where the force is applied.

A structure where all internal forces can be determined using equations of equilibrium alone.

A force that acts on a structural element, causing it to bend or deform.

The force per unit area acting on a structural element, caused by internal forces.

The change in length or shape of a material due to applied stress.

The slope of the stress-strain curve in its linear elastic region, indicating the stiffness of the material.

The point on the stress-strain curve where the material begins to deform permanently.

The stress at which a material breaks or fails.

The ability of a material to deform plastically before fracturing.