抗震等级

抗震等级为一、二、三级的框架和斜撑构件（含梯段），其纵向受力钢筋采用普通钢筋时，钢筋的抗拉强度实测值与屈服强度实测值的比值不应小于1 抗震等级为一、二、三级的框架和斜撑构件（含楼梯段），其纵向受力钢筋采用普通钢筋时，钢筋的抗拉强度实测值与屈服强度实测值的比值不应小于1.25；钢筋的屈服强度实测值与屈服强度值的比值不应大于1.3，且钢筋在最大拉力下的总伸长率实测值不应小于9%。 For the non-prestress longitudinal reinforcements of framed structures and bracing members (including staristep) assigned to seismic grades 1,2 and 3, the ratio of the actual ultimate tensile strength to actual tensile yield strength shall not be less than 1.25, and the ratio of actual tensile yield strength to characteristic strength shall not greater than 1.3, and the measured value of percentage of total elongation shall not be less than 9% under the maximum tension.