不同水压下混凝土断裂能弱化效应试验研究

Experimental Study on Fracture Energy of Concrete Under Different Hydraulic Pressure

为了研究混凝土在水力劈裂过程中的断裂能变化规律,分析了水力劈裂中的各荷载做功,建立了水压力下断裂能的计算公式,开展了12组混凝土水力劈裂试验,得出了水压力对混凝土断裂能的影响规律。结果表明:水压力作用下混凝土的断裂能减小,水压力越大,混凝土的断裂能越小;混凝土在水力劈裂过程中的断裂能弱化效应不可忽略,在0.3 MPa水压力下,该弱化效应随水压力增加呈线性递增趋势。

In order to study the influence of water pressure on fracture energy of concrete under hydraulic fracturing,the work done by each load in hydraulic fracturing test was analyzed,the calculation formula of fracture energy under water pressure was established,and 12 groups of hydraulic fracturing tests of concrete were carried out.The results show that the fracture energy of concrete decreases under the action of water pressure,and the greater the water pressure,the smaller the fracture energy of concrete,which shows that the weakening effect of the fracture energy in the process of concrete hydraulic fracturing cannot be ignored,the weakening effect increases linearly with the increase of water pressure which not exceed 0.3 MPa.