碾压混凝土拱坝诱导缝等效强度试验及椭圆简化模型的可靠性研究

Equivalent Strength Test of Induced Joints in RCC Arch Dam and Reliability Study of The Simplified Elliptical Model

诱导缝作为碾压混凝土拱坝的结构防裂措施,其缝断面的等效强度、结构形式以及设置位置对控制大坝在温度荷载作用下的无序开裂作用发挥具有重要影响。通过试件模拟试验的方法,对碾压混凝土拱坝中非穿透型矩形诱导缝和椭圆形诱导缝等效强度,分别与混凝土龄期和消弱度之间关系展开研究。结果认为椭圆简化模型可以直接用于碾压混凝土拱坝诱导缝数值模拟分析研究,基本不需要进行修正。

Induced joints are used as structural crack prevention measures for RCC arch dams.The equivalent strength,structural form,and installation position of the joint section have important effects on controlling the disordered cracking of the dam under the effect of temperature load.Through the simulation test of the specimen,the relationship between the equivalent strength of the non-penetrating rectangular and elliptical induced joints in the RCC arch dam and the age and weakness of the concrete were studied.The results show that the elliptical simplified model can be directly used in the numerical simulation analysis of the induced joints of RCC arch dams,and basically does not need to be modified.