新老混凝土界面抗剪强度研究现状综述

State of the art review on shear strength of interface between new and old concrete

新老混凝土界面抗剪强度是衡量界面黏结质量的关键因素,准确的计算抗剪强度是保证界面安全的前提。介绍了近几十年内国内外新老混凝土界面抗剪强度计算公式的研究状况,其中,主要分线性表达式和非线性表达式两类介绍了国外的研究状况。同时,对国内外规范中的计算公式进行了对比分析,指出了它们之间的差异。最后,指出了值得进一步深入研究的几个问题,这对于新老混凝土界面抗剪强度的研究具有一定的参考价值。

Shear strength of interface between new and old concrete is a critical factor to measure bond quality of interface, and the security of interface is mainly based on the calculation accuracy of shear strength. It presents a literature review on design expressions for shear strength of interface between new and old concrete in the last decades, and the abroad research situation was mainly introduced by divided into two categories, namely linear expressions and nonlinear expressions. Meanwhile, comparative analysis was conducted among design expressions in codes at home and abroad and the differences among them were presented.Finally, some problems on further research in this area were also pointed out.This kind of study may be served as the reference of shear strength of interface between new and old concrete.