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加荷速率对混凝土抗压性能的影响,在过去的六十多年来,已有不少研究者作过大量的工作。但在抗拉方面,由于施加轴心荷载上的某些困难,至使研究得较少,特别是在低于常规加荷速率0.39兆帕/分的慢速加荷情况下。然而,在实际的大体积混凝土内部和表层,因温变和湿差而引起的温变应力和干缩应力是变化的,且其变化速率一般都低于上述常规测定抗拉强度(或极限拉伸值)的加荷速率。正如Davis等的试验结果
The influence of loading rate on the compressive performance of concrete has been a lot of work done by many researchers in the past sixty years. However, in terms of tensile strength, due to some difficulties in the application of axial load, the study was less, especially at slow load rates below the conventional loading rate of 0.39 MPa. However, in the actual mass concrete, the temperature change stress and the dry shrinkage stress caused by the temperature change and the wetness change are different, and the rate of change is generally lower than the above-mentioned conventional determination of the tensile strength (or ultimate pull). (Extension). As the test results of Davis et al.