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帮帮忙,植筋拉拔试验设计值咋确定

浏览:39次 | 提问时间: 06-22 03:10
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4个答案
Prosperous悲 06-22 03:10

你好,植筋拉拔试验设计值确定方法如下:钢筋拉拔实验标准值1、首先要知道钢筋的牌号Q235或345直径的平方*3.14/4*牌号/1000得出屈服强度再乘以0.9结果就是你需要的抗拉值例如6*6*3.14/4*235/1000*0.9

噩夢 06-22 03:18

5.97MPs2、新规范规定,二级钢的抗拉强度设计值是300N/mm,不是310N/mm,一根直径22的钢筋面积是380mm,那么钢筋植筋拉拔设计值就是300X380

噩夢 06-22 03:27

114000N,即114Kn,3、框架填充墙墙体拉结筋,根据汶川地震的经验数据,现在不提倡后植筋锚固墙体拉结筋,(应优先采用预埋法,多种方法)后植筋锚固墙体拉结筋验收时一般不检查,只是现场施工时监理对植筋进行检查,查钻孔深度(大于80mm)锚固胶是否合格、过期,现场拉拔拉力是否符合要求(拉力大于6.8),外观有无松动,植筋端部有无损伤4、植筋拉拔合格标准;a、一般植筋72小时后,可采用拉力计(千斤顶)对所植钢筋进行拉拔试验加载方式见右图。为减少千斤顶对锚筋附近混凝土的约束,下用槽钢或支架架空,支点距离≥max(3d,60mm)。然后匀速加载2∽3分钟(或采用分级加载),直至破坏。破坏模式分为钢筋破坏(钢筋拉断)、胶筋截面破坏(钢筋沿结构胶、钢筋界面拔出)、混合破坏(上部混凝土锥体破坏,下部沿结构胶、混凝土界面拔出)3种,结构构件植筋,破坏模式宜控制为钢筋拉断。b、当做非破坏性检验时,最大加载值可取为0.95Asfyk。c、抽检数量可按每种钢筋植筋数量的0.1%确定,但不应少于3根。

久居深海蓝透人心 06-22 03:36

植筋拉拔试验设计值HPB235:设计值=面积×钢筋强度设计值(210N/mm2)HRB335:设计值=面积×钢筋强度设计值(300N/mm2)HRB400:设计值=面积×钢筋强度设计值(360N/mm2)各级别牌号钢筋拉拔试验设计值如下:直径(mm)面积(mm2)HPB235(kN)HRB335(kN)HRB400(kN)628.275.9**6.533.187.0**850.2710.615.118.11078.5416.523.628.312113.123.833.940.714153.932.346.255.416201.142.260.372.418254.553.476.391.620314.266.094.2113.122380.179.8114.0136.825490.9103.1147.3176.728615.8*184.7221.732804.2*241.3289.5361018*305.4366.4401257*377.0452.4

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