Comparison of Bond Strength of Steel Bars in Normal- and High-Strength Concrete
Comparison of Bond Strength of Steel Bars in Normal- and High-Strength Concrete
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DOI：
10.1061/(asce)0899-1561(2004)16:4(365
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发表时间：
2004-08
影响因子：
3.2
通讯作者：
M. Harajli
中科院分区：
文献类型：
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作者：
M. Harajli
对嵌入无侧限普通强度混凝土（NSC）和高强混凝土（HSC）中的钢筋失效时的平均粘结强度进行了比较分析研究。该分析利用实验得出的局部粘合应力滑移模型，并考虑随着棒力的增加，沿着展开/拼接长度的渐进粘合恶化。分析预测的平均粘合强度（或展开/拼接强度）结果与 NSC 和 HSC 的实验数据非常一致。该分析预测，在粘合失效时，沿着开发/拼接长度，粘合应力分布高度不均匀，尤其是对于 HSC。在低于一定的展开/拼接长度限制（约 15-20db）时，HSC 的失效时平均粘合强度（归一化为 fc'1/2）比 NSC 更大。然而，当开发长度增加超过此限制时，HSC 的标准化粘合强度逐渐小于 NSC。 ...
A comparative analytical study of the average bond strength at failure of reinforcing bars embedded in unconfined normal-strength concrete (NSC) and high-strength concrete (HSC) is undertaken. The analysis makes use of an experimentally derived local bond stress-slip model and considers the progressive bond deterioration along the development/splice length with the increase in bar force. Results of the average bond strength (or development/splice strength) predicted by the analysis showed excellent agreement with experimental data for both NSC and HSC. The analysis predicted a highly nonuniform bond stress distribution at bond failure along the development/splice length, particularly for HSC. Below a certain limit of the development/splice length (about 15-20db), the average bond strength at failure, normalized to fc′1/2, is larger for HSC as compared to NSC. However, as the development length increases beyond this limit, the normalized bond strength of HSC becomes progressively smaller than that of NSC. ...