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材料导报  2026, Vol. 40 Issue (6): 24110017-9    https://doi.org/10.11896/cldb.24110017
  无机非金属及其复合材料 |
再生混凝土-超高性能混凝土不同粗糙程度后浇节点试件剪力传递机理研究
孙畅1,2, 罗奕敬1, 王宗昊1, 赵海烨1, 刘琼1,*, 潘峰2
1 上海理工大学环境与建筑学院,上海 200093;
2 上海建工五建集团有限公司,上海 200063
Study on Shear Transfer Mechanism of RAC-UHPC Post-cast Node Specimens with Different Interfacial Roughness
SUN Chang1, LUO Yijing1, WANG Zonghao1, ZHAO Haiye1, LIU Qiong1,*, PAN Feng2
1 School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;
2 Shanghai Construction Industry Fifth Construction Group Co., Ltd., Shanghai 200063, China
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摘要 本工作通过对再生混凝土(RAC)-超高性能混凝土(UHPC)后浇节点试件进行直剪试验,分析RAC-UHPC后浇节点试件在直剪作用下破坏模式及裂缝开展规律,并探索界面粗糙程度对剪力传递性能的影响及其剪力传递机理。试验结果表明,对于直线形节点(L形)试件,界面非常粗糙的试件(L-S-N)裂缝至少有一侧沿界面发展;界面一般粗糙的试件(L-R-N)和界面未处理的试件(L-C-N)的破坏模式类似,两侧裂缝均沿界面发生破坏。所有试件荷载-位移曲线在加载初期均出现线性增长阶段,随后荷载急剧下降,试件发生脆性破坏。与L-C-N系列试件相比,L-R-N系列和L-S-N系列试件的极限剪切应力平均值分别提高了35%和116%。不同界面粗糙度试件均发生界面粘结破坏,其水平方向上的最大应变为其他方向最大应变的2~3倍。研究表明,界面粗糙度对RAC-UHPC后浇节点试件的剪力传递性能具有显著影响,提高界面粗糙度可显著增强界面抗剪性能,促进再生混凝土的高性能化与工程应用。
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孙畅
罗奕敬
王宗昊
赵海烨
刘琼
潘峰
关键词:  再生混凝土  超高性能混凝土  粗糙度  破坏模式  剪力传递    
Abstract: The shear performance of recycled aggregate concrete(RAC) - ultra-high performance concrete(UHPC) post-cast node specimens were investigated through direct shear tests. The failure modes and crack propagation patterns under direct shear were analyzed. The influence of interfacial roughness on the shear transfer performance was investigated, and the shear transfer mechanism was further explored. Test results indicated that for specimens with linear(L-type) joints, the specimens with very rough interfaces(L-S-N) exhibit at least one crack propagating away from the interface. In contrast, specimens with generally rough interfaces(L-R-N) and untreated interfaces(L-C-N) exhibit interfacial crac-king, with cracks propagating along the interface. The load-displacement curves of all specimens display an initial linear ascending branch corresponding to elastic behavior, followed by an abrupt load drop, characteristic of brittle shear failure. The average ultimate shear stress of the L-R-N and L-S-N specimens increased by 35% and 116%, respectively, compared to that of the L-C-N specimens. All L-typed specimens with diffe-rent interfacial roughness experienced interfacial bond failure, with the maximum horizontal strain being 2 to 3 times greater than that in the other directions. The findings demonstrate that interfacial roughness has a significant impact on the shear transfer performance of RAC-UHPC post-cast node specimens. Increased interfacial roughness significantly improves shear resistance, promoting the high-performance use of recycled concrete in structural applications.
Key words:  recycled aggregate concrete    ultra-high performance concrete    roughness of surface    failure mode    shear transfer
出版日期:  2026-03-25      发布日期:  2026-04-03
ZTFLH:  TU528.31  
基金资助: 上海市“科技创新行动计划”启明星项目(22QC1400900)
通讯作者:  *刘琼,上海理工大学环境与建筑学院讲师、硕士研究生导师,目前主要从事建筑固废资源化、再生混凝土、智能混凝土等方面的研究工作。lq612@usst.edu.cn   
作者简介:  孙畅,上海理工大学环境与建筑学院副教授、硕士研究生导师。目前主要从事再生混凝土结构、再生混凝土材料、建筑垃圾资源化技术等方面的研究工作。
引用本文:    
孙畅, 罗奕敬, 王宗昊, 赵海烨, 刘琼, 潘峰. 再生混凝土-超高性能混凝土不同粗糙程度后浇节点试件剪力传递机理研究[J]. 材料导报, 2026, 40(6): 24110017-9.
SUN Chang, LUO Yijing, WANG Zonghao, ZHAO Haiye, LIU Qiong, PAN Feng. Study on Shear Transfer Mechanism of RAC-UHPC Post-cast Node Specimens with Different Interfacial Roughness. Materials Reports, 2026, 40(6): 24110017-9.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24110017  或          https://www.mater-rep.com/CN/Y2026/V40/I6/24110017
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