混凝土水力劈裂的数值模拟

针对混凝土坝越来越高,越来越容易产生水力劈裂的问题,总结已有混凝土水力劈裂问题的研究成果,结合水力劈裂的发生条件、在水压作用下混凝土裂缝的开展以及影响水力劈裂作用的因素,探讨水力劈裂数值模拟的方法.比较有限元法、扩展有限元法和无单元法在水力劈裂数值模拟问题应用上的优点与不足,并分析数值模拟模型建立过程中参数设置的差别.结果表明,必须从坝材料、施工和水压等多方面考虑才能确保水力劈裂数值模拟结果的可靠性.

Numerical simulation on hydraulic fracture in concrete

With the concrete dams being higher and higher, the problems are easily caused by hydraulic fracturing. The research results of existing concrete problems under hydraulic fracturing are summarized. The numerical simulation method on the hydraulic fracturing problem is discussed combining with the conditions for the occurrence of hydraulic fracturing, the development of concrete cracks under water pressure and other influence factors. The advantages and disadvantages of the application of finite element method, extended finite element method and element free method in numerical simulation of hydraulic fracturing are compared, and the difference of parameter settings in the process of building the numerical simulation model is analyzed. The results show that the materials, construction, water pressure and other aspects must be considered in order to ensure the reliability of hydraulic fracturing simulation results.