Bond strength modeling for corroded reinforcement in reinforced concrete
Bond strength modeling for corroded reinforcement in reinforced concrete
复制标题
DOI：
10.12989/sem.2004.17.6.863
复制
发表时间：
2004-06
影响因子：
2.2
通讯作者：
Xiao-hui Wang;Xi-la Liu
中科院分区：
文献类型：
--
作者：
Xiao-hui Wang;Xi-la Liu
钢筋混凝土结构中钢材的腐蚀导致混凝土盖板开裂，粘结强度降低，钢筋截面减小。其中，钢筋与混凝土粘结强度的降低对钢筋锈蚀钢筋混凝土构件的性能研究具有重要意义。本文首先提出了一种基于混凝土受拉平均应力-应变关系的模糊裂缝分析模型，用于评估无腐蚀钢筋覆盖混凝土的最大破裂压力发展。其次，将开裂混凝土作为正交各向异性材料处理，评估腐蚀产物膨胀引起的内压。最后对腐蚀钢筋的粘结强度进行了计算，并与试验结果进行了比较。
Steel corrosion in reinforced concrete structures leads to concrete cover cracking, reduction of bond strength, and reduction of steel cross section. Among theses consequences mentioned, reduction of bond strength between reinforcement and concrete is of great importance to study the behaviour of RC members with corroded reinforcement. In this paper, firstly, an analytical model based on smeared cracking and average stress-strain relationship of concrete in tension is proposed to evaluate the maximum bursting pressure development in the cover concrete for noncorroded bar. Secondly, the internal pressure caused by the expansion of the corrosion products is evaluated by treating the cracked concrete as an orthotropic material. Finally, bond strength for corroded reinforcing bar is calculated and compared with test results.