（西南交通大学土木工程学院， 成都 610031）

［摘要］结合10组新老混凝土界面抗剪试验研究数据，对三种新老混凝土界面抗剪强度的计算方法进行了研究。将试件界面抗剪强度计算值和实测值进行对比，结果表明：这三种计算方法对新老混凝土的粘结抗剪能力估计都不够准确，界面抗剪强度计算值和实测值吻合较差，均不能很好地应用于工程实践。

［关键词］新老混凝土； 界面； 抗剪强度； 粘结抗剪能力； 植筋抗剪能力

中图分类号：TU528-01文献标识码：A文章编号：1002-848X(2016)15-0065-04

Calculation methods of shear strength on new-to-old concrete interface

Mao Dejun， Qian Yongjiu

(School of Civil Engineering， Southwest Jiaotong University， Chengdu 610031， China)

Abstract:Combined with 10 sets of research data from new-to-old concrete interface shear tests, three kinds of calculation methods of new-to-old concrete shear strength were studied. The calculated values and measured values of shear strength on specimen interfaces were compared. The analysis results show that these three calculation methods are not accurate enough to estimate the bond shear capacity of new-to-old concrete, and the calculated values and measured values of  shear strength on interfaces don′t coincide with each other, so those methods are not well used in engineering practice.

Keywords:new-to-old concrete； interface； shear strength； bond shear capacity； planting rebar shear capacity

*中央高校基本科研业务费专项资金资助（SWJTU11ZT33）。

作者简介：毛德均，博士研究生，Email：541089451@qq.com。