混凝土剪切力学性能试验研究

Experimental Study on Shear Mechanical Properties of Concrete

为探究混凝土剪切力学性能,设置单轴剪切和考虑轴压作用剪切力学试验,应用材料剪切试验机得到不同加载工况下混凝土破坏形态和剪切位移—荷载曲线,通过试验数据对比分析,主要得到以下结论:轴压作用使得平行剪切向混凝土侧面形成一定的斜裂缝,同时使得剪切位移—剪切荷载曲线存在荷载稳定阶段;随着轴压比的提高,混凝土剪切应力和剪切位移明显增大,并对其作用机理进行分析,研究结论对混凝土剪切力学性能的分析具有重要意义。

In order to explore the shear mechanical properties of concrete,uniaxial shear test and shear mechanical test considering axial compression are set up.The failure mode and shear displacement-load curve of concrete under different loading conditions are obtained by using material shear test machine.Through the comparative analysis of test data,the following conclusions are mainly obtained:axial compression makes the parallel shear form a certain inclined crack towards the side of concrete,at the same time,the shear displacement-load curve is in the stage of load stability.While with the increase of axial compression ratio,the shear stress and shear displacement of concrete increase obviously,and the mechanism of action is analyzed.The research conclusion is of great significance to the analysis of shear mechanical properties of concrete.