1. A shell structure is a structure that is mostly stronger on the outside and weaker on the inside. An example of a shell structure could be an igloo.
2. Force
2.1. Internal forces
2.1.1. Shear
2.1.1.1. A force that pushes a structure or object in opposite directions. The result of doing this causes the structure/object to most likely stretch and eventually break. An example of shear is when you wash your hands and rub them together.A force that pushes a structure or object in opposite directions. The result of doing this causes the structure/object to most likely stretch and eventually break. An example of shear is when you wash your hands and rub them together
2.1.2. Torsion
2.1.2.1. This is a type of force that twists a structure or object. If you use this force on a structure or object it will most likely start twisting and getting thinner between the area that you are twisting and eventually break. An example of torsion is someone twisting their hair or a piece of thread.
2.1.3. Compression
2.1.3.1. It is a force that squeezes/presses a structure. the results of compression is usually the object or structure flattening or bending and breaking. An example of compression is, when you lay your head on a pillow and the pillow squeezes. Compression is affecting the pillow.
2.1.4. Tension
2.1.4.1. This force stretches a structure or object. the result of doing this to an structure/object is it expanding or getting longer. if you continue to stretch (pull) the structure apart it might eventually break. Tension happens when you play tug of war. Rope is being pulled from both sides and the tension force is being applied.
2.2. External forces
2.2.1. It is any force applied to the structure or object from the outside.
2.2.1.1. Push- An external force to move something away from oneself.
2.2.1.2. Gravity- A natural force that pulls structures, objects and any body mass to the center of Earth.
2.2.1.3. Wind- A natural movement of the air/ usually in the form of a current of air blowing in a certain direction.
2.2.1.4. Pull- An external force to move something toward oneself.
3. Structures
3.1. Combination structure
3.1.1. A combination structure is a structure that is a combination of shell, frame, and solid structure. An example is a house
3.2. Shell structure
3.3. Frame structure
3.3.1. Frame structures is a structure with many combinations of different structure which includes slab, beam and column. An example of a frame structure is a window frame
3.4. Solid structure
3.4.1. A solid structure is basically hard all the way through and it's very strong. An example of a solid structure could be a pyramid.
3.5. Form
3.5.1. It's the basic shape of a structure.
4. Loads
4.1. Static load
4.1.1. Dead load
4.1.1.1. The dead load is on any type of structure is caused by the force of gravity acting on itself. The dead load cannot vary.
4.1.2. Live load
4.1.2.1. The live load can vary it's weight on the structure itself. An example of a live load can be humans on a bus. humans are the live load in the bus and they have different weight so it can vary.
4.2. Dynamic load
4.2.1. A dynamic load is a load that is basically a live load that is moving so an example is a person on a bike.