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建筑用钢的机械性能有很多指标,但是一般常用的建筑用钢筋,主要用屈服点、抗拉强度、伸长率和冷弯四大指标来控制。下面简单介绍一下这四项指标的内容。一、屈服点钢筋受到外力作用时,内部就会产生一种相应的力来抵抗,这种单位横截面积上所受到的内力,就是我们常说的“应力”。同时,由于外力的作用,钢筋就跟着发生变形,这种变形就叫做应变,也即是单位长度上的变形。
There are many indicators for the mechanical properties of construction steel, but the commonly used construction steel reinforcement is mainly controlled by the four indicators of yield point, tensile strength, elongation and cold bending. The following briefly describes the contents of these four indicators. First, when the yield point rebar is subjected to an external force, a corresponding force will be generated inside to resist. The internal force on the cross-sectional area of the unit is what we often call “stress.” At the same time, due to the action of external forces, the steel bars are deformed. This deformation is called strain, which is deformation per unit length.