Civil and Environmental Engineering 2220A/B Lecture 9: Lecture 9
7 Nov 2018
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Document Summary
The key piece of design occurs at the connection: Need to be connected such that there is tension. Need the member to fail before the connection. That can be treated as a steel tension member as the tensile forces will be carried by the steel. When concrete cracks, that means we cannot carry any tension force because it will be in two seperate parts. Therefore, the tensile force will be carried by the steel alone. This usually happens when the load is below the yield of the steel, but above the yield of the concrete. Eventually with more load, the steel will yield and stretch and look like a stress- strain curve (undergo elastic then plastic deformation) then fail. In the linear elastic region, the material deformation will revert. Because if we can see the members in a structure elongating, we know something is wrong and therefore we know to get away.
