论文部分内容阅读
本文报道一项研究钢筋混凝土轴心受拉和受弯等构件中两根主生裂缝之间的钢筋与混凝土的粘结与滑移性能的试验结果。提出了一种新的试验方法,将钢筋一分为两半,置于拉伸试件截面的两侧,以代替将钢筋置于截面中央的传统办法。采用这种新方法,可以直接观测沿试件纵向任意点的滑移值和应变值,以及次生裂缝的分布和宽度。试验中发现次生裂缝对试件端部的滑移值有相当的影响。这种试件与传统试件的受力和变形反应虽然不完全相同,但在粘结与滑移的主要特性方面,却是类似的。实测数据也大体能证实作者所拟定的粘结与滑移的计算模式。这种试件将是深入研究粘结与滑移现象的有效形式。
This paper reports the results of a study on the bond and slippage between steel bars and concrete between two primary cracks in members such as tensioned and bent members of reinforced concrete. A new test method is proposed, which splits the bar into two halves and places it on either side of the cross-section of the tensile specimen instead of the traditional method of placing the bar in the middle of the cross-section. Using this new method, we can directly observe the slip value and strain value along the longitudinal direction of the specimen at any point along with the distribution and width of secondary cracks. It is found that the secondary cracks have a considerable influence on the slip value at the end of the specimen. Although the stress and deformation reactions of this kind of specimen and the traditional specimen are not exactly the same, they are similar in the main characteristics of bonding and sliding. The measured data can also largely confirm the calculation model of the bond and slippage developed by the author. This specimen will be an in-depth study of adhesion and slippage of the effective form.