Shear behavior of RC beams with spatial distribution of corrosion-induced fractured stirrups by finite element analysis

被引：0
|
作者：
Yang C. [1 ,2 ]
Xue X. [1 ,2 ]
Zhang H. [1 ]
Li T. [1 ,2 ]
机构：
[1] School of Architecture and Civil Engineering, Xiamen University, Xiamen
[2] Xiamen Engineering Technology Center for Intelligent Maintenance of Infrastructure, Xiamen
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2018年 / 39卷 / 07期
关键词：
Finite element analysis; Fracture of stirrup induced by severe corrosion; Reinforced concrete beam; Shear behavior;
D O I：
10.14006/j.jzjgxb.2018.07.017
中图分类号：
学科分类号：
摘要：
For reinforced concrete (RC) beams in corrosive environment, stirrups are more likely to corrode, and in severe cases, the corrosion may lead to the complete sectional-area loss at the corner. Due to the different sevice environment, uneven quanlity of concrete and different installation of the structure members, the fractured location of stirrups in reinforced concrete is irregular. By simulating the anchorage failure and bond loss of fractured stirrups, finite element analysis was carried out to investigate the effect of the spatial distribution of fractured stirrups on the shear performance of RC beams. Analytical output indicats that: due to the anchorage failure near the bending end of stirrups, the fractured stirrups can not yield when the reinforced concrete beams failure. The shear capacity of reinforced concrete beams decreases with the number of yielded stirrups. About the effect of the positions of fractured stirrups induced by severe corrosion within the shear span, compared with the positions located in the stirrups near the support points, the positions located in the stirrups near the loading points have a more significant impact on the shear performance of RC beams. When the fractured stirrups induced by severe corrosion take place both in the bottom corner of side-leg of stirrups near the support points and in the top corner of side-leg of stirrups near the loading points, the stirrups are nearly out of function, resulting in the lowest shear capacity, which is almost as the same as that of the specimens without stirrups. © 2018, Editorial Office of Journal of Building Structures. All right reserved.
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页码：146 / 153
页数：7
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