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本文通过对高强混凝土在等幅重复荷载作用下抗拉疲劳性能的试验研究,分别给出了高强混凝土的劈拉疲劳、轴拉疲劳和弯拉疲劳的疲劳方程,并将其疲劳性能进行了比较,为实际工程设计提供了依据。对劈拉疲劳的试验结果,本文提出了考虑破坏概率P和应力比R的S—N—R—P的疲劳方程,为利用计算机进行混凝土疲劳的模拟试验研究提供了依据。文中并对高强混凝土和普通混凝土的疲劳性能进行了比较。
In this paper, the tensile fatigue behavior of high-strength concrete under constant-amplitude repeated loads is experimentally studied. The fatigue equations for the high-strength concrete are presented, including fatigue fatigue, axial fatigue and bending fatigue, and their fatigue properties are compared. , provides the basis for the actual engineering design. For the fatigue test results of tensile fatigue, the S-N-R-P fatigue equation considering the failure probability P and the stress ratio R is proposed in this paper, which provides a basis for the use of computer to simulate the concrete fatigue test. In this paper, the fatigue properties of high-strength concrete and ordinary concrete are compared.