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本文根据四片PPC箱形约束梁的斜截面疲劳抗裂性试验结果,分析了试验梁在疲劳荷载作用下的受力特点,认为PPC箱形约束梁的疲劳抗裂性较相应的简支梁更为不利,并探讨了PPC箱形约束梁斜截面疲劳抗裂性的计算原理和方法。
In this paper, based on the test results of the fatigue crack resistance of four PPC box girders, the mechanical behavior of the beam under fatigue load is analyzed. The fatigue crack resistance of the box girder with PPC is more than that of the corresponding simply supported beam More unfavorable, and discussed the calculation principle and method of fatigue crack resistance of inclined section of PPC box girder.