Elastoplastic Dilatant Interface Model for Cyclic Bond-Slip Behavior of Reinforcing Bars
Elastoplastic Dilatant Interface Model for Cyclic Bond-Slip Behavior of Reinforcing Bars
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DOI：
10.1061/(asce)em.1943-7889.0000994
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
J. Murcia‐Delso;P. Shing
中科院分区：
文献类型：
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作者：
J. Murcia‐Delso;P. Shing
摘要本文提出了一种新的界面模型来模拟混凝土内嵌钢筋的循环粘结滑移行为。多面塑性公式用于模拟发生在粘结滑移中的两种主要非弹性变形机制。一种是钢筋肋间混凝土的破碎和剪切，另一种是混凝土与钢筋表面之间的滑动。这两种机制由不同的屈服面和不相关的流动规则来表示。该流动规律考虑了钢筋与破碎混凝土颗粒楔入作用引起的界面剪切膨胀。该界面模型已在有限元分析程序中实现，并用实验数据进行了验证。该模型易于校准，并且能够在广泛的约束情况下重现杆的粘结滑移行为，包括杆拔出和混凝土分裂破坏。
AbstractThis paper presents a new interface model to simulate the cyclic bond-slip behavior of steel reinforcing bars embedded in concrete. A multi-surface plasticity formulation is used to model two major inelastic deformation mechanisms occurring in bond slip. One is the crushing and shearing of the concrete between the bar ribs, and the other is the sliding between the concrete and bar surfaces. These two mechanisms are represented by different yield surfaces and nonassociated flow rules. The flow rules account for the shear dilatation of the interface induced by the wedging action of the bar ribs and crushed concrete particles. The interface model has been implemented in a finite element analysis program and has been validated with experimental data. The model is easy to calibrate and is able to reproduce the bond-slip behavior of bars under a wide range of confinement situations, including bar pullout and concrete splitting failures.