抗震等级为3级是否需要带E钢筋

抗震等级为3级是否需要带E钢筋
2025-03-16 16:49:54
推荐回答(2个)
回答(1):

综述:不一定。

并非所有的额抗震三级都需要带E钢筋。一般根据项目不同结构确定,实际有带E也有不带E的,这个要根据图纸来决定是否用带E钢筋。

带E钢筋其实是指国家质检总局和国家标准化委员会共同发布的GB1499.2–2007《钢筋混凝土用钢第2部分:热轧带肋钢筋》标准中规定,适用较高要求的抗震结构牌号加“E”。

简介:

抗震结构要求使用具有抗震性能的钢筋,即在建筑物受到地震波冲击时,可延缓建筑物断裂发生时间、避免建筑物在瞬间整体倒塌,从而提高建筑物的抗震性能。

因此在抗震结构中,理想的钢筋性能应有一个较长的屈服平台,有很好的延性,同时钢筋实际屈服强度相对于屈服强度标准值不宜过高。

回答(2):

需要带E钢筋的条件见GB50666-2011《混凝土结构工程施工规范》第5.2.2条。
5.2.2 ...............对按一、二、三级抗震等级设计的框架和斜撑构件(含梯段)
中的纵向受力钢筋应采用 HRB335E、HRB400E、HRB500E、HRBF335E、
HRBF400E 或 HRBF500E 钢筋。
这里范围说得明确:“框架和斜撑构件(含梯段) 中的纵向受力钢筋”!

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