Interface shear transfer in reinforced engineered cementitious composites under push-off loads
Interface shear transfer in reinforced engineered cementitious composites under push-off loads
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DOI：
10.1016/j.engstruct.2019.110013
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发表时间：
2020-03
影响因子：
5.5
通讯作者：
Jun Peng;P. Zhao;Shan Wang;Siong Wee Lee;Shaobo Kang
中科院分区：
文献类型：
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作者：
Jun Peng;P. Zhao;Shan Wang;Siong Wee Lee;Shaobo Kang
工程水泥基复合材料（ECC）已广泛用于各种载荷条件下的结构构件和接头。然而，由于缺乏实验结果，增强ECC界面的剪切传递机制需要进一步研究。本文研究了增强型 ECC 在推脱载荷作用下的界面剪切传递。进行实验测试以量化抗剪力并研究不同加载阶段的剪切传递机制。实验方案中考虑了箍筋比例和类型的影响。获得了增强 ECC 的峰值抗剪力和残余抗剪力，并与现有设计方法的计算值进行了比较。通过分析测量的箍筋应变和横向剪胀来确定界面剪切传递机制。根据实验结果提出了设计方程。最后得出了增强ECC界面剪切设计的结论。
Engineered cementitious composites (ECC) has been widely used for structural members and joints under various loading conditions. Nevertheless, the shear transfer mechanism at the interface of reinforced ECC needs further study due to the lack of experimental results. This paper investigates the interface shear transfer of reinforced ECC subjected to push-off loads. Experimental tests were carried out to quantify the shear resistance and to investigate the shear transfer mechanisms at different loading stages. The effects of ratio and type of stirrups were considered in the experimental programme. The peak and residual shear resistances of reinforced ECC were obtained and compared with the calculated values from existing design methods. The interface shear transfer mechanisms were determined by analysing the measured strains of stirrups and transverse dilatancy. A design equation was proposed based on experimental results. Finally, conclusions were drawn for the interface shear design of reinforced ECC.