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在静载强度试验的基础上，进行了３个系列混凝土薄壁管试件在（σ，τ）复杂应力状态下的疲劳强度试验．以双剪应力强度理论作为（σ，τ）状态的静载强度标准，对沿（σ，τ）系（从原点引出的）射线方向的疲劳荷载，以该方向的静强值进行规范化处理，使所得的ＳｌｏｇＮ关系有较好的规律性．由试验结果及文献分析，提出了一个描述（σ，τ）状态下疲劳强度的经验预测式．
Based on the static load test, three series of concrete thin-walled pipe specimens were tested for fatigue strength under complex stress conditions (σ, τ). Using the double shear stress strength theory as the static load strength standard for the (σ, τ) state, the fatigue load along the (σ, τ) series (extracted from the origin) direction is normalized by the static strength value in that direction. The resulting S-logN relationship has better regularity. Based on the experimental results and literature analysis, an empirical formula to describe the fatigue strength in (σ, τ) state is proposed.