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本文中直径较大的钢筋是指受力钢筋的直径d>25mm的和箍筋直径d>10mm的。 《混凝土结构设计规范》(GBJ10—89)第6.1.3条规定:室内正常环境梁、柱混凝土保护层厚度不应小于25mm,且不小于受力钢筋的直径;梁、柱箍筋混凝土保护层不应小于15mm。当使用直径d>25mm的钢筋作受力筋时,例如d=28mm,混凝土保护层最小厚度应为28mm,已超过25mm;当使用直径d>10mm的钢筋作箍筋时,例如d=12mm,要满足箍筋混凝土保护层不
The larger diameter steel bar in this article refers to the diameter d>25mm of the stressed steel bar and the diameter of the stirrup d>10mm. Article 6.1.3 of the “Specifications for Design of Concrete Structures” (GBJ10-89) stipulates that the thickness of the protective layer of beam and column concrete in the normal indoor environment shall not be less than 25 mm and shall not be less than the diameter of the stressed steel bar; Should not be less than 15mm. When using steel bars with diameter d>25mm as reinforcement ribs, for example d=28mm, the minimum thickness of concrete protection layer should be 28mm, which is more than 25mm; when using steel bars with diameter d>10mm as stirrup, eg d=12mm, To meet the stirrups concrete protection layer is not