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首页 » 试验检测论坛 » 钢材及钢结构试验检测 » 关于钢筋拉伸试验钢筋取样长度的问题
lcm0312 - 2013/8/5 11:04:00
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!ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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。ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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L2ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
其中:ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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5.01dñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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0.89dñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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100mmñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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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:ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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d(mm)ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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6ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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8ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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10ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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12ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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14ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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16ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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18ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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20ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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22ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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25ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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28ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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32ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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L0+2L1(mm)ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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42ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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56ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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70ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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84ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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98ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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112ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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126ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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140ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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154ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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175ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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196ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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224ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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最小长度(mm)ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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242ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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256ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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270ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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284ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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298ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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312ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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326ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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340ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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354ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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375ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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396ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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424ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd

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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。ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
ajun28 - 2013/8/26 11:40:00
好帖ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
童星 - 2013/11/26 20:30:00
有学习的价值。顶ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
woshileihong - 2014/3/29 15:40:00
不错,不过现在钢筋要先测重量偏差,都取5根500mm以上了。ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
lqhlhl - 2014/10/3 16:25:00
学习下!非常不错~ñéCYÍ÷•Ägbbs.3c3t.comCå«6 >KëÞd
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