题目：
对有抗震设防要求的结构，其纵向受力钢筋的强度应满足设计要求；当设计无具体要求时，对一、二、三级抗震等级设计的框架和斜撑构件（含梯级）中的纵向受力钢筋应采用HRB335E、HRB400E、HRB500EHRBF335E、HRBF400E或HRBF500E钢筋，其强度和最大力下总伸长率的实测值应符合哪些规定？
答案：
参考答案：
①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
②钢筋的屈服强度实测值与强度标准值的比值不应大于1.30
③钢筋的最大力下总伸长率不应小于9%
对有抗震设防要求的结构，其纵向受力钢筋的强度应满足设计要求；当设计无具体要求时，对一
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