Abstract: In this paper,taking prestress degree as a variable,partially prestressed concrete,general reinforced concrete and fully prestressed concrete are unified into an identical set of reinforced concrete.The effects of prestress degree,shear span ratio and concrete strength on the anti-cracking strength Q_f of reinforced concrete beams are studied and a formula for computing Q_f is put forward,based on a vast amount of test data.

Key words: anti-cracking for inclined section, prestress degree, shear span ratio, concrete strength

摘要： 本文以预应力度为参数,将全预应力,部分预应力及普通钢筋混凝土在计算上统一在同一个加筋混凝土系列中,研究了预应力度、剪跨比及混凝土强度对加筋混凝土梁斜截面抗裂强度的影响,并依据试验结果提出一个斜截面抗裂强度的计算公式,式中合理地计入了截面形式的影响。

关键词: 斜截面抗裂度, 预应力度, 剪跨比, 混凝土强度