Forces and Structures

1. Center Of Gravity

1.1. Is the place where both sides have the same amount of weight

1.1.1. ruler

1.1.2. textbook

2. Types of Structures

2.1. Combination- They have solid, shell, and frame parts

2.1.1. dome stadium

2.1.2. tunnel

2.2. Frame-Uses a network, or skeleton of materials that support each other

2.2.1. skeleton

2.2.2. goalies net

2.3. Shell-has a hollow, curved shape.

2.3.1. Dome

2.3.2. helmet

2.4. Solid-uses solid construction materials to support loads

2.4.1. Bridge

2.4.2. concrete dam

3. Loads

3.1. Dead-Caused by the force of gravity acting on the structure itself.

3.2. Live-Caused by gravity, but can vary.

3.3. Dynamic-Caused by other forces

4. External Forces

4.1. A force that acts on structures.

4.1.1. Point of application-The place to contact the filling cabinet to apply the force.

4.1.2. Plane of application-An imaginary flat surface that the force passed though

5. Form and Function

5.1. Form-The basic shape of the structure.

5.1.1. CN tower

5.1.2. house

5.2. Function- The job that the structure does.

5.2.1. watch

5.2.2. flashlight

6. Internal Forces

6.1. A force act within a structure.

6.1.1. Tension- An internal force that pulls an object apart.

6.1.2. Compression-An internal force that presses an object together.

6.1.3. Torsion-An act when the object is twisted.

6.1.4. Shear-An internal force when an object is pull apart in two directions.