基于试验和仿真的混凝土早龄期抗裂特性方法研究

目前的混凝土抗裂性能研究方法存在不足,无法考虑工程实际中混凝土温度变化过程,不能考虑混凝土结构所受的约束状态,更不能考虑早龄期阶段的抗裂特性.针对这一问题,中国水利水电科学研究院自主开发了混凝土开裂全过程仿真试验系统,该系统既可以进行混凝土全龄期抗裂性能研究,试验得出真实温度历程、不同约束度条件下的混凝土材料参数,特别...

Research on crack resistance of early age concrete based on experiment and simulation

there are obvious defects in the current research methods of concrete crack resistance, which cannot consider the process of concrete temperature change in engineering practice, the constraint state of concrete structure, and the crack resistance characteristics of early age stage. In order to solve this problem, China Institute of Water Resources and Hydropower Research independently developed the whole process simulation test system of concrete cracking. The system can not only study the anti-cracking performance of concrete in the whole age,but also obtain the real temperature history,concrete material parameters under different constraint conditions, especially the parameters before the age of 3 days. It can also carry out simulation calculation,and test the results with each other. It is proved that the real crack resistance of concrete is analyzed. The research method has been successfully applied in the construction process of Wudongde super high arch dam,which provides a scientific and technological support for the evaluation of crack resistance characteristics of low heat cement concrete and the optimization of temperature control curve,as well as a new method and idea for the evaluation of crack resistance of concrete.