（山东省建筑科学研究院建筑结构研究所，济南 250031）
［摘要］采用一种新方法——后锚固拔出法对结构混凝土强度进行检测，通过对后锚固拔出法检测混凝土强度试验混凝土孔壁与胶体界面处微元体应力进行分析可知，后锚固拔出法在反力环直径一定的情况下，存在界限破坏深度。进一步推导理论拔出力并总结经验拔出力公式，在此基础上讨论后锚固拔出法检测混凝土强度的影响因素，利用此研究结果可较准确地检测混凝土强度，最后通过大量的试验建立了后锚固拔出法检测混凝土强度的测强-曲线。［关键词］后锚固拔出法；混凝土强度；受力机理；回归分析
Regression and analysis of mechanism of pull-out post-anchored method to check concrete strength
Cui Shiqi, Shi Lei, Wang Jinshan, Kong Xuwen（Structure Institute of Shandong Provincial Academy of Building Research, Jinan 250031, China）
Abstract:This paper analyzes pull-out post-anchored method to check concrete strength in the case of various embedment lengths and diameter of reaction rings. The test data and the stress of cubic element are analyzed, which reveals that there is the threshold depth on the condition of definitive diameter, the pullout force will increase with the increase of the diameter of reaction rings and the decrease of threshold depth. Utilizing the conclusion to check the concrete strength is more reliable. The regression line analysis based on the large mounts of experimental data shows that the linear relationship is the best fit curve.
Keywords:pull-out post-anchored method； concrete strength； mechanism；regression analysis
作者简介：崔士起，研究员，Email：:jiegousuo@sina.com。
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