Bond stress-slip model for rebar-concrete interface under monotonic and cyclic loading
Bond stress-slip model for rebar-concrete interface under monotonic and cyclic loading
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单调循环荷载下钢筋-混凝土界面粘结应力滑移模型
DOI：
10.1016/j.istruc.2021.07.093
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发表时间：
2021-12
期刊：
影响因子：
4.1
通讯作者：
Shan Zhi
中科院分区：
文献类型：
--
作者：
Lv Xiaoyong;Yu Zhiwu;Shan Zhi
钢筋混凝土结构的力学性能与钢筋-混凝土界面的粘结应力-滑移关系密切相关。本文提出了一种新的单调和循环荷载下的粘结应力-滑移模型。针对单调加载下的界面行为，提出了一种创新的由弹簧单元、摩擦单元和开关单元组成的微观单元模型，可以有效地从物理意义上表征界面的微损伤力学行为。采用微元并联系统，将单个弹簧单元的断裂门槛值设为随机变量，导出了粘结应力-滑移关系和界面损伤变量的表达式。随后，简明实用的表达式的粘结强度，峰值滑移单调加载下制定。进一步建立了单调荷载作用下钢筋-混凝土界面的粘结应力-滑移模型。针对钢筋-混凝土界面的循环本构模型，提出了一种新的粘结强度退化规律的循环修正系数法。该模型能较准确地反映循环荷载作用下粘结强度的衰减情况，并能反映循环次数、最大滑移值和反向荷载对粘结强度衰减的影响。此外，在单调和循环载荷下，该模型的计算结果与实验结果吻合良好。模型中的所有参数都具有明确的物理意义。
The mechanical properties of reinforced concrete (RC) structures are closely related to the bond stress-slip relationship of rebar-concrete interface. In this paper, a novel bond stress-slip model under monotonic and cyclic loading is proposed. For interfacial behaviour under monotonic loading, an innovative micro-element model, consisting of a spring element, a friction element and a switch element, is proposed to effectively characterize the interfacial micro-damage mechanical behaviours in a physical sense. By adopting a parallel system of micro-elements and setting the fracture threshold of individual spring element as a random variable, the expressions of the bond stress-slip relationship and interfacial damage variable are derived. Subsequently, succinct practical expressions for the bond strength, peak slip under monotonic loading are formulated. The bond stress-slip model for rebar-concrete interface under monotonic loading are further established. For cyclic constitutive model of rebar-concrete interface, a new method of cyclic correction factor for the degradation law of bond strength is developed. The bond strength degradation under cyclic loading affected by the number of cycles, maximum slip value and opposite loading can be reflected with reasonable accuracy. Furthermore, the predictions calculated by the proposed model under monotonic and cyclic loading are in favorable agreement with experimental results. All parameters in the model have clear physical meaning.
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影响因子：
3.2
作者：
Dan‐Dan Wang;Qianping Shi;Yi-Xia Wang;Shaobo Kang
通讯作者：
Dan‐Dan Wang;Qianping Shi;Yi-Xia Wang;Shaobo Kang
DOI：
10.1061/(asce)em.1943-7889.0000994
发表时间：
2016-02
期刊：
Journal of Engineering Mechanics-asce
影响因子：
--
作者：
J. Murcia‐Delso;P. Shing
通讯作者：
J. Murcia‐Delso;P. Shing
影响因子：
4.1
作者：
Chao-Wei Tang
通讯作者：
Chao-Wei Tang
影响因子：
2.9
作者：
R. Serpieri;G. Alfano
通讯作者：
R. Serpieri;G. Alfano
DOI：
10.1016/s0020-7683(00)00053-6
发表时间：
2001-05-01
影响因子：
3.6
作者：
Chaboche, JL;Feyel, F;Monerie, Y
通讯作者：
Monerie, Y