Hooke’s law is the elastic limit of a solid so this is the stress/strain of the buildings weight.
This where a mechanical property’s that measures the stiffness of a solid material. It defines the strain and stress on the material. He said the compression only goes one way. With a metal bar it could be stretched and compressed and it will still be the same length.
All of the materials have to be weather resistance so rain doesn’t come into the roof and the wind hits the side of the building it isn’t going to fall down
All materials have to be fire resistance so if you catch an egg on fire it will not burn down the house or building this is why you have fire doors and things like fire resistance so they use less likely materials that will catch fire so they uses reinforced wood with metal or something that has a low fire risk.
Got information on Page 90 in edexcel construction BTEC first core units
The forces are gravity this is where materials are pulled down towards the ground and friction is where stuff is rubbed together like if its windy the tiles on your roof will move and rub together this will make the tiles more likely to where out and make holes in it.
The stress on a is very high, steel can be subject to shearing forces under high compression loads shearing forces act parallel to the plane of steel and cause a sliding failure
Steel can take a lot of force such as the weight of a building on top of it.
It varies on what type of aggregate used, air content and the free water to cement ratio
Concrete is strong in some ways but when it comes to tensile strength it is not good at all it can n0t take much tension unless you add steel to it and make it reinforced concrete.
The compressive strength ranges from 4 to 180Nmm2
The forces acting on bricks is down force because the weight of a house is pushing down on the bricks can cause them to crack or even smash this in the worst scenario can knock out bricks and you could louse a wall.
The natures acting upon most of construction materials some of it is compressive on suck as walls and foundations this is where the weight of the building is pushing down on them pushing it further into the ground. So you have to counter act the weight to stop the building just sinking into the ground.
In a real life situation if you have a door there is a joist that is getting compressed down from the rest of the building and it is trying to hold the door together pulling it in so it doesn’t just fall over.
In everyday use of concrete you have use them in walls so the wall doesn’t just fall over.
Well let’s take a dam it is a huge lump of concrete that stops water from rushing down a river and also to save water for cities, towns and villages the pressures on that are huge
Density- varies. Depends on the mix, High density concrete is about 2.5g/cm3; low density concrete is 0.4 to 2.0g/cm3.
One of nature’s biggest conurbations is gravity so if you don’t make your walls fall down if they are not level or plum they will fall down
Density- varies. Generally around 1.85g/cm3
When they are lifting things you have to think about the gravitational force trying to pull the let’s say a pipe gravity will want to pull into the ground.
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