| 基于钻孔法检测预应力混凝土梁有效应力的有限元分析 |
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| 引用本文： | 徐满意,林高杰,孙熙平.基于钻孔法检测预应力混凝土梁有效应力的有限元分析[J].水道港口,2008,29(5). |
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| 作者姓名： | 徐满意 林高杰 孙熙平 |
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| 作者单位： | 交通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 |
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| 摘 要： | 对于已经建好的预应力结构,如何检测结构物当前的有效应力一直是难以解决的问题。文中利用钻孔法检测预应力混凝土梁的有效应力,通过有限元软件ANSYS的计算得到钻孔前后应变的变化,结合理论计算可确定检测工作中最佳的孔径、孔深和贴应变片的位置。在实际检测工作中,应首先通过有限元分析确定最佳的孔径、孔深和贴应变片的位置,然后测量贴应变片处钻孔前后应变的变化,结合相关理论计算即可得到预应力混凝土梁的有效应力。
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| 关 键 词： | 钻孔法 预应力混凝土梁 有效应力 有限元 |
Finite element analysis on effective stress of prestressed concrete beam based on hole-drilling method |
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| XU Man-yi,LIN Gao-jie,SUN Xi-ping.Finite element analysis on effective stress of prestressed concrete beam based on hole-drilling method[J].Journal of Waterway and Harbour,2008,29(5). |
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| Authors: | XU Man-yi LIN Gao-jie SUN Xi-ping |
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| Abstract: | How to test the effective stress of a prestressed structure has been a difficult issue.In this paper,we determined the effective stress of a prestressed concrete beam by the hole-drilling method and calculated the strains before and after drilling the hole by ANSYS,then we got the most suitable hole radius,hole depth and the place that we put strain gauge by theoretical calculations.In the practical work,the most suitable hole radius,hole depth and the place that we put strain gauge should be determined first by finite element method,and the effective stress of a prestressed concrete beam will be got by measuring the strains before and after drilling the hole combined with theoretical calculations. |
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| Keywords: | hole-drilling method prestressed concrete beam effective stress finite element method |
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