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关于钢筋拉伸试验钢筋取样长度的问题 [复制链接]

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大家都清楚钢筋试验在工程中是最基础最广泛的试验检测项目之一,其意义重要程度是不言而喻的。本贴致那些刚刚步入钢筋试验领域的新手们!‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
如题所示,对于检测新手或不熟悉钢筋拉伸试验的朋友,经常会对钢筋拉伸试件取样长度产生异议,现就此问题简单说明。‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
钢筋拉伸试验试样长度由三部分组成,即:原始标距L0+2倍原始标距至夹头距离L1+2倍夹持长度L2‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
其中:‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
原始标距:GB/T228.1中规定原始标距L0=k(此处k值取5.65,为例),即5.01d‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
原始标距至夹头距离:GB/T228.1D.2.2中规定“……试样原始标距的标记与最接近夹头的距离不小于,即0.89d‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
夹持长度:一般万能试验机夹头长度约为120mm,有效夹持长度至少约为100mm‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
所以拉伸试样最短取样长度为:5.01d+0.89d+0.89d+100+1006.79d7d+200。列表如下:‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

d(mm)‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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6‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

8‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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10‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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12‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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14‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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16‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

18‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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20‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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22‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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25‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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28‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

32‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

L0+2L1(mm)‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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42‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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56‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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70‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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84‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

98‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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112‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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126‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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140‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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154‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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175‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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196‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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224‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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最小长度(mm)‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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242‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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256‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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270‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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284‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

298‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

312‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

326‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

340‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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354‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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375‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

396‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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424‚DM¢K­æº#bbs.3c3t.com±À~òçɸG

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综上所述,直径20mm以下钢筋取样长度400mm,直径22mm32mm取样长度500mm完全满足规范要求。‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
分享 转发
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2#

好帖‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
赢在起点!
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3#

有学习的价值。顶‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
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4#

不错,不过现在钢筋要先测重量偏差,都取5根500mm以上了。‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
一路求知
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5#

学习下!非常不错~‚DM¢K­æº#bbs.3c3t.com±À~òçɸG
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