A creep test of concrete with different moisture contents is conducted using the MTS815.02 test system to investigate the creep damage law of concrete with respect to stress and time. The creep properties of concrete under hydration and the relationship between water content and concrete creep deformation are analyzed. The damage due to hydration and stress is considered comprehensively. The concrete creep characteristics and time-dependent creep model of different water contents are established based on rheological basic components. The Levenberg–Marquardt algorithm is used to fit the test data of concrete with different water contents. Furthermore, the correctness and rationality of the creep model are verified. Under the same stress level, the creep curves of different water contents show different creep stages. As the water content increases, creep changes at the same stress level are prone to stable creep and accelerated creep stages. The damage inside the concrete under high water content is significant, and the concrete is susceptible to creep deformation. The high degree of fit between the test data and the model curve reflects the suitability and feasibility of the established creep model to describe the deformation process of concrete creep with different water contents. The model accurately reflects not only the creep characteristics of the attenuation and stable creep stages but also overcomes the shortcomings of the traditional Nishihara model, which has difficulty in describing the accelerated creep. The deterioration law of creep parameters also reflects the damage degree of concrete under different water content conditions to some extent.

使用MTS815.02测试系统进行了不同含水量混凝土的蠕变测试，以研究混凝土在应力和时间方面的蠕变破坏规律。分析了水合条件下混凝土的蠕变特性，以及含水量与混凝土蠕变变形之间的关系。综合考虑由于水合作用和压力造成的损坏。基于流变基本成分，建立了不同含水量的混凝土蠕变特性和时变蠕变模型。Levenberg–Marquardt算法用于拟合含水量不同的混凝土的测试数据。此外，验证了蠕变模型的正确性和合理性。在相同应力水平下，不同含水量的蠕变曲线表现出不同的蠕变阶段。随着水含量的增加，在相同应力水平下的蠕变变化易于产生稳定的蠕变和加速的蠕变阶段。高含水量下混凝土内部的破坏非常明显，并且混凝土容易发生蠕变变形。试验数据与模型曲线之间的高度吻合反映了所建立蠕变模型用于描述不同含水量混凝土蠕变变形过程的适用性和可行性。该模型不仅准确反映了衰减和稳定蠕变阶段的蠕变特性，而且克服了传统Nishihara模型的缺点，该模型难以描述加速蠕变。蠕变参数的劣化规律在一定程度上反映了混凝土在不同含水量条件下的破坏程度。