摘要
在完成12片部分预应力混凝土约束箱梁试验的基础上,本文详细讨论了弯矩比、剪跨比及预应力值对约束箱梁抗剪强度的影响,并提出了修正剪跨比m’和平均预应力度λ的概念。本文还采用回归分析的方法得出计算抗剪强度的经验公式。用该式计算所得结果与102个国内外试验数据相比较,吻合较好。该式可供设计研究参考。
Based on the test of 12 restrained PPC box girders with stirrups, the effects of moment ratio(n), shear span ratio (m) and prestressing on the shear strength of such girders are discussed, and new concepts of modified shear span ratio (m') and average degree of prestressing (λ) are proposed. With these two concepts, a new formula for predicting the shear strength is presented. The calculated values from the formula agree well with 102 test data at home and abroad.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1990年第2期79-86,共8页
Journal of Southwest Jiaotong University
