INTERFACIAL BOND ANALYSIS OF DEFORMED BARS TO CONCRETE
INTERFACIAL BOND ANALYSIS OF DEFORMED BARS TO CONCRETE
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DOI：
10.14359/12339
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发表时间：
2002-11
影响因子：
1.8
通讯作者：
O. Choi;Woong Lee
中科院分区：
文献类型：
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作者：
O. Choi;Woong Lee
在本研究中，分析了劈裂粘结破坏的机制，劈裂粘结破坏是结构构件中拼接杆的主要破坏类型。推导出具有肋形变形的钢筋与周围混凝土粘结强度的简单表达式。采用有限元方法对提供围压的混凝土盖板的围压性能进行了模拟。研究了界面性能对结合强度的影响。利用分析模型得到的粘结强度值与前人研究的粘结试验结果吻合较好。在分析结果与试验结果对比的基础上，提出了摩擦系数、黏聚力和有效肋面角的合理取值范围。
In this research, bond mechanisms are analyzed for splitting bond failure, the major failure type for spliced bars in structural members. A simple expression is derived to predict bond strength of reinforcing bars with rib deformation to the surrounding concrete. Finite element analysis is used to model the confining behavior of concrete cover that provides confinment. The roles of the interfacial properties on bond strength are examined. Values of bond strength obtained using the analytical model are in good agreement with bond test tesults from prior studies. Based on the comparison between the analytical results and the test results, realistic ranges of the friction coefficient, cohesion, and the effective rib face angle are proposed.