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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]

1#
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![ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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。[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
其中:[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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:[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

d(mm)[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

6[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

8[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

10[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

12[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

14[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

16[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

18[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

20[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

22[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

25[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

28[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

32[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

L0+2L1(mm)[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

42[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

56[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

70[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

84[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

98[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

112[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

126[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

140[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

154[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

175[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

196[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

224[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

最小长度(mm)[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

242[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

256[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

270[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

284[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

298[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

312[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

326[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

340[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

354[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

375[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

396[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

424[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨

[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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。[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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2#

好帖[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
赢在起点!
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3#

有学习的价值。顶[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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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。[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
一路求知
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5#

学习下!非常不错~[ÚnA•¦êmwbbs.3c3t.comÞ<RZ6Àñ¨
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