In fact, when it comes to the difference between aseismic steel bar and ordinary steel bar, we can see from the name that one is with aseismic steel bar and the other is ordinary steel bar. Seismic steel bars are marked with E, and now they are basically used in the market. The core of steel bar with E is that the index of super-strength ratio of steel bar should not be too large, while the index of strength-yield ratio and elongation should not be too small.
The Difference between Seismic Reinforcement Bar and Common Reinforcement Bar
For the difference between aseismic steel bar and ordinary steel bar, the following three points are more scientific:
1) The ratio of the measured tensile strength to the measured yield strength is not less than 1.25;
2) The ratio of the measured yield strength to the characteristic value of the standard yield strength is not more than 1.30;
3) The maximum total elongation of the aseismic steel bar is not less than 9%.
The above three elements ensure the anti-seismic ability of the steel bars, so that the anti-seismic steel bars can be "stabilized" when the buildings are inclined and deformed, and do not break.
However, according to the three requirements of the new standard for seismic steel bars, the measured values of strength and elongation of steel bars have been improved to some extent in technical indicators, such as the first stipulation that seismic steel bars should bear more than 25% tension from yielding to breaking; the second one guarantees that the discreteness of yield strength of steel bars will not be too large to affect the effect of ductility requirement in design; and the third one guarantees that the discreteness of yield strength of steel bars will not be too large The maximum total elongation of bar is increased from 7.5% to 9%. The improvement of these technical indicators strengthens the seismic capacity of steel bars and ensures that structural members have better ductility under seismic force.
Therefore, the essential difference between aseismic steel bar and ordinary steel bar is to make the steel bar have better ductility, which can better ensure that the important structural components have enough plastic deformation capacity and energy dissipation capacity in earthquake.