| 钻孔法检测残余应力技术中有关参数的数值计算分析 |
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| 引用本文： | 赵冲久,邓雷飞,田双珠.钻孔法检测残余应力技术中有关参数的数值计算分析[J].水道港口,2011,32(2):122-127. |
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| 作者姓名： | 赵冲久 邓雷飞 田双珠 |
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| 作者单位： | 1. 交通运输部天津水运工程科学研究所水工构造物检测、诊断与加固技术交通行业重点实验室,天津,300456
2. 长沙理工大学水利工程学院,长沙,410076 |
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| 摘 要： | 通过建立有限元数值模型,分别模拟了钻孔前后两种不同状态下应力应变分布情况。经比较计算出钻孔后的梁底混凝土表面轴线上各节点的轴向应变,并结合相关理论,计算出钻孔前梁底中心节点应力的理论值,从而找出与梁底中心节点实际施加应力的吻合点。根据节点理论值与实际施加应力的吻合情况,结合应变测量机理,最终确定最佳孔径、孔深和最佳粘贴应变片位置等参数。
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| 关 键 词： | 钻孔法 残余预应力 参数分析 |
Numerical calculation on parameters of residual stresses measuring by hole-drilling method |
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| ZHAO Chong-jiu,DENG Lei-fei,TIAN Shuang-zhu.Numerical calculation on parameters of residual stresses measuring by hole-drilling method[J].Journal of Waterway and Harbour,2011,32(2):122-127. |
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| Authors: | ZHAO Chong-jiu DENG Lei-fei TIAN Shuang-zhu |
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| Institution: | 1.Tianjin Research Institute for Water Transport Engineering,Key Laboratory of Harbor ＆ Marine Structure Safety,Ministry of Transport,Tianjin 300456,China;2.School of Hydraulic Engineering,Changsha University of Science ＆ Technology,Changsha 410076,China) |
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| Abstract: | Based on the established finite element model,the stress and strain distribution before and after drilling the hole was simulated.On the basis of comparison,the axial strain of each node on the axis of the beam bottom after drilling was calculated.Combining with the related theories,the theoretical stress of central node at beam bottom was also calculated.According to the results,the position at which the applied stress was coincided well with the theoretical stress of central node at beam bottom was found out.Based on the agreements of theoretical and actual stresses,the parameters such as optimum diameter,hole depth and the best position to stick the strain gauge were finally determined by the combination of strain measurement mechanism. |
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| Keywords: | hole-drilling method residual stress parameter analysis |
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