碾压混凝土诱导缝等效强度试验研究

Experimental Research on Equivalent Strength of Roller Compacted Concrete Crack Director

根据实际拱坝中设置诱导缝方式的不同,在碾压混凝土轴拉试件中埋设不同形式诱导片模拟各种不同的情况,并进行了轴拉试验。得到不同诱导缝形式、试件尺寸及面积折减率的诱导缝的等效强度,从中分析诱导缝等效强度对于不同情况的变化规律。诱导缝等效强度随试件尺寸的增加而减小。

According to different manners of crack directors in arch dams, different induced planes were embedded into the RCC tension specimen to simulate all kinds of crack directors, and then axial tension experiments were performed. The equivalent strengths of all kinds of crack director specimens with dimension and area reduction rate were obtained, and then the variation of the equivalent strengths of all kinds of crack director specimens with different situation were analyzed. Some conclusions were drawn as follows： For specimens with the same area reduction rate, the equivalent strength decreases with the increase of specimen dimension.