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介绍了预应力高强混凝土管桩受弯性能试验中的裂缝和挠曲变形等试验现象,对裂缝出现的位置、发生的形态和裂缝数量的变化规律及挠曲变形的变化规律进行了分析;对预应力高强混凝土管桩的受弯性能进行了初步总结,指出现行管桩规范关于构件开裂弯矩和极限承载力的计算方法有待改进,并提出了开裂弯矩和极限弯矩的修正建议计算表达式,计算结果与试验实测结果吻合较好。
The test phenomena such as crack and deflection in prestressed high-strength concrete pipe pile bending test are introduced. The location of the crack, the change of the shape and the number of cracks and the variation rule of the deflection are analyzed. The flexural behavior of prestressed high strength concrete pipe piles is preliminarily summarized. It is pointed out that the calculation method for the cracking moment and the ultimate bearing capacity of the existing pipe pile code needs to be improved, and the proposed calculation formulas of cracking moment and ultimate bending moment are proposed Formula, the calculated results agree well with the experimental results.