EVALUATION FOR RESIDUAL AXIAL FORCE OF CORRODED HIGH TENSILE BOLTS
EVALUATION FOR RESIDUAL AXIAL FORCE OF CORRODED HIGH TENSILE BOLTS
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腐蚀高强度螺栓残余轴向力的评估
DOI：
10.14455/isec.res.2014.8
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Yumi Mori
中科院分区：
文献类型：
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作者：
R. Satake;K. Fujii;Yumi Mori
本文提出了一种在试验中估算锈蚀高强度螺栓残余轴力的方法，并对锈蚀高强度螺栓轴力的测量进行了分析。为了再现由于腐蚀而导致的轴向力减小，通过在初始轴向力下沿纵向或高度方向切割螺栓头来制作测试样本。以螺栓高度和宽度的折减厚度为参数，绘制了轴力下降曲线。因此，残余轴力可以通过螺栓减薄量来估算。此外，还对一座长期停用的桥梁的真实的锈蚀高强度螺栓进行了残余轴力测试，并对轴力下降曲线进行了检验。为了对锈蚀形态进行分类，我们对锈蚀高强度螺栓的三维表面形态进行了非接触测量，并考虑了锈蚀高强度螺栓的表面形态与轴力降低的关系。
This paper presents a method for evaluating the residual axial force of corroded high strength bolts in experiments, and analysis measuring the axial force of corroded high strength bolts. In order to reproduce the axial force reduction due to corrosion, the test specimens were made by cutting the bolt head widthwise or the height-wise with an initial axial force. The curve of axial force lowering is prepared with a reduced thickness in height and width of bolts as a parameter. Therefore, the residual axial force can be estimated by the thickness reduction of bolt. Moreover, we measured the residual axle force of real corroded high strength bolts, taken from a bridge removed from service for a long time, and inspected an axis drop curve. In order to classify corrosion shapes, we measured the three-dimensional surface shape of corroded high strength bolts without contact, and considered the relationship between the surface shape of corroded high strength bolts and the axial force reduction.