concrete is shit in tension… which means it cannot handle bending… and due to the hardness of the concrete.. its easier to chip away whereas steel does not chip. A high grade steel would be more effective than concrete … why do you think they reinforce concrete structures with steel? engineer here btw
correct
because concrete is easier to shape and lighter than steel
not to mention… concrete isnt as slick as steel
that basically happens in a lot of structures… its usually reinforced with reed bar depending on the size of the slab… but ultimately when it comes down to it… its easier to pour concrete than shape steel
thats just retarded
it isnt directly proportional at certain points and even then its close enough to be used in a way for engineering purposes…
thats mohrs circle for determining the normal vs shear stress… its maximums and minimums… materials look a bit different
so does concrete… everything wears down… there are paints and materials that can slow it down… and the better the steel the harder it is to corrode… there are also processes where you corrode the outer layers and lock it in to prevent further corrosion underneath… take aluminum for example… its extremely corrosive but its how it corrodes that prevents it from corroding futher
hopefully in 500 years we wont need it