| 盲孔法识别拉(压)弯钢管内力的分析与试验 |
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| 引用本文： | 王龙,吴波.盲孔法识别拉(压)弯钢管内力的分析与试验[J].东南大学学报(自然科学版),2009,39(6). |
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| 作者姓名： | 王龙 吴波 |
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| 作者单位： | 华南理工大学亚热带建筑科学国家重点实验室,广州,510640 |
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| 基金项目： | 教育部新世纪优秀人才支持计划资助项目 |
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| 摘 要： | 为了解在役拉(压)弯钢管的内力情况,在盲孔法测量钢结构应力的基础上,提出了拉(压)弯钢管的内力识别方法.采用盲孔法对不同外径、不同荷载下的3组9根钢管试件进行了2种不同方式下的钻孔试验,研究了不同钻孔方式、不同外径、不同表面应力分布情况下的钻孔释放规律.试验结果表明:钻孔加工应变对测量精度影响较大,计算应力时应消除钻孔加工应变的影响;在应力超过f_y/2时需对释放系数进行塑性修正;钢管表面应力的测量精度随钢管直径的增大而提高.盲孔法用于拉(压)弯钢管的表面应力检测和杆件内力识别,无论理论上还是实际操作都是可行的,识别精度满足工程应用要求.
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| 关 键 词： | 盲孔法 钢管 识别 应力 |
Analysis and experimental study on identification of inner force of steel tube under tension(compression) and bending using blind-hole method |
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| Wang Long Wu Bo.Analysis and experimental study on identification of inner force of steel tube under tension(compression) and bending using blind-hole method[J].Journal of Southeast University(Natural Science Edition),2009,39(6). |
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| Authors: | Wang Long Wu Bo |
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| Institution: | Wang Long Wu Bo(State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | To find out the inner force of existing steel tube under tension(compression) and bending,a method based on stress measurement of steel structure using blind-hole method is proposed to identify the inner force of the member.Experimental investigations with two different hole-drilling manners were carried out on nine steel tubes of different diameter and loading.The rules of the strain release were studied under different diameters,hole-drilling manners,and distributions of surface stress when the holes were... |
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| Keywords: | blind-hole method steel tube identification stress |
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