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本文对比于国内其他的环形预应力实验,采用4组不同长度的环向预应力筋进行试验,通过最小二乘法准确求出摩阻系数和偏差系数,并在伸长量测试中计入锚垫板等工作段的压缩变形和夹具回缩量等参数进行修正。希望对今后的大桥张拉工作有一定参考作用。
In this paper, compared with other domestic annular prestressing experiments, four groups of hoop prestressing tendons with different lengths were tested. The friction coefficient and coefficient of variation were calculated accurately by least square method. Plate and other work sections of the compression deformation and fixture retraction and other parameters to be amended. Hope that the future of the bridge tension work has a certain reference.