oh i take it the strain of bars under tension and compression is similar in value? but whereas in tension it is stretched.. in compression, it is being compressed.. so could strain reAlly be similar?
when there is a lot of stirrups sometimes settlement occurs such that there is a 1mm gap. This can cause the bar to hav a strain of say 0.005. What would happen if some bars are in yield strain but much below the rupture strain. Is it not they still function well?
Concrete columns can suffer settlement.. can this cause some bars to yield? for example rebar strain is about 0.002 and there is bound to be settlement in some parts due to the reinforcements and stirrups.. this can cause gap of 0.005 that is already in yield strain of rebars.
