基于三角面片平均高度和坡度的新旧混凝土界面抗剪强度计算模型
潘白露,宋晓刚,章子华.基于三角面片平均高度和坡度的新旧混凝土界面抗剪强度计算模型[J].宁波大学学报(理工版),2026,39(3):45-53.DOI:10.20098/j.cnki.1001-5132.2025.1012
PAN Bailu,SONG Xiaogang,ZHANG Zihua.A shear strength calculation model for old-new concrete interfaces based on the average height and inclination angle of triangular facets[J].Journal of Ningbo University(Natural Science & Engineering Edition),2026,39(3):45-53.DOI:10.20098/j.cnki.1001-5132.2025.1012
| Title: | A shear strength calculation model for old-new concrete interfaces based on the average height and inclination angle of triangular facets |
| 作者: | 潘白露, 宋晓刚, 章子华 |
| Author(s): | PAN Bailu, SONG Xiaogang, ZHANG Zihua |
| 关键词: | 新旧混凝土界面; 粗糙齿; 粗糙度; 抗剪强度 |
| Keywords: | old-new concrete interface; rough tooth; roughness; shear strength |
| 分类号: | TU375 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.1012 |
| 文献标识码: | A |
| 摘要: | 为探究新旧混凝土界面粗糙度对界面抗剪性能的影响，开展新旧混凝土界面内剪切试验，获得了不同界面参数下试件的剪应力—滑移曲线和破坏模式，并对试验结果进行参数分析。结果表明，界面粗糙度和混凝土强度对抗剪性能有显著影响，随着界面粗糙度的增大和混凝土强度的增加，破坏模式由单一的界面黏结破坏逐渐转变为黏结与机械咬合的复合型破坏；在此基础上提出一种基于界面三角面片平均高度和坡度粗糙度的界面抗剪强度计算模型，最后的计算结果与试验值吻合良好，验证了模型的有效性和准确性。 |
| Abstract: | To investigate the influence of interface roughness on the shear performance of old-new concrete interfaces, a systematic experimental study was conducted and a quantitative analysis was accomplished. The shear stress–slip curves and failure modes were obtained from tests on specimens with different interface parameters, and the test results were analyzed parametrically. The results indicate that both interface roughness and concrete strength have significant effects on shear performance. As the interface roughness and concrete strength increase, the failure mode gradually changes from a single bonding failure to a combined failure governed by both bonding and mechanical interlocking. A quantitative roughness model based on the average height and inclination angle of interface triangular facets was proposed, and a shear strength prediction model was established considering interface roughness and concrete strength. The calculated results show good agreement with the experimental data, confirming validity and accuracy of the proposed quantitative model. |
| 参考文献 /References: | [1]., 程恒, 张国新, 等. 施工期分层浇筑与温度荷载对重力坝坝踵应力影响研究[J]. 水利水电技术(中英文), 2024, 55(5):84-92. [2].李富民, 陈志祥. 装配式结构新老混凝土竖缝界面区孔隙率分布模型[J]. 哈尔滨工业大学学报, 2023, 55(1): 125-133. [3].陆铁坚, 王鹏皓, 杨诗龙, 等. 预制装配整体式混凝土剪力墙结构墙板节点非线性有限元分析[J]. 铁道科学与工程学报, 2015, 12(2):342-347. [4].彭雪, 郑栋栋. 基于桥梁改造的新旧混凝土结构粘接加固复材改性研究[J]. 粘接, 2024, 51(7):17-20. [5].刘佳. 湿度影响下双块式无砟轨道道床板新旧混凝土界面力学特性研究[J]. 铁道标准设计, 2023, 67(1):115- 122. [6].AYINDE O O, WU E J, ZHOU G D, et al. Influence of interface roughness geometrical parameters on the shear behaviour of old and new concrete interface[J]. Asian journal of civil engineering, 2022, 23(2):229-247. [7].郭进军, 王少波, 张雷顺, 等. 新老混凝土粘结的剪切性能试验研究[J]. 建筑结构, 2002, 32(8):43-45, 62. [8].潘传银, 石雪飞, 周可攀. 新、老混凝土粘结抗剪强度试验[J]. 交通科学与工程, 2014, 30(2):6-12. [9].HE Y, ZHANG X, HOOTON R D, et al. Effects of interface roughness and interface adhesion on new-to-old concrete bonding[J]. Construction and building materials, 2017, 151:582-590. [10].FAN J C, WU L L, ZHANG B. Influence of old concrete age, interface roughness and freeze-thawing attack on new-to-old concrete structure[J]. Materials, 2021, 14(5): 1057. [11].杨培仕. 新老混凝土界面直剪力学性能测试研究[J]. 工业建筑, 2022, 52(1):200-204, 121. [12].ZHANG W X, YAN B Q, YE Y, et al. Direct shear test study on old and new concrete[J]. Journal of building engineering, 2024, 82:108391. [13].张渤钰, 沈岐平, 赵勇, 等. 基于3D激光扫描的预制混凝土构件结合面粗糙度检测技术研究[J]. 建筑科学, 2020, 36(1):111-116. [14].黄舜, 王乾峰, 安阳, 等. 基于内聚力模型的新旧混凝土粗糙界面剪切性能仿真分析[J]. 应用力学学报, 2025, 42(6):1375-1386. [15].唐琳. 基于三维激光扫描的装配式构件粗糙度快速测定方法研究[D]. 南京: 南京航空航天大学, 2025. [16].WU E J, AYINDE O O, ZHOU G D. Shear behaviour and constitutive model of old-to-new concrete interface with single roughness tooth: experimental and numerical investigation[J]. Structures, 2023, 53:1196-1214. [17].王振领. 新老混凝土粘结理论与试验及在桥梁加固工程中的应用研究[D]. 成都, 2007. [18].SHU Y K, SHEN Z Z, ZHANG H W, et al. Experimental investigation and peridynamic modelling on tensile failure of new-to-old concrete bonding zone[J]. Structures, 2025, 71:108165. [19].李权恒. 界面剂和粗糙度对新老混凝土粘结性能的影响试验研究[D]. 长春: 吉林大学, 2023. [20].中华人民共和国住房和城乡建设部.GB/T 50010—2010[S]. 北京: 中国建筑工业出版社, 20. [21].WU E J, AYINDE O O, ZHOU G D. Interface shear behaviour between precast and new concrete in composite concrete members: effect of grooved surface roughness[J]. KSCE journal of civil engineering, 2022, 26(6):2799-2812. [22].VALIKHANI A, JAHROMI A J, MANTAWY I M, et al. Experimental evaluation of concrete-to-UHPC bond strength with correlation to surface roughness for repair application[J]. Construction and building materials, 2020, 238:117753. [23].BAI M Y, DING T, ZHAO Y, et al. Shear performance of new-to-old concrete interface based on various surface preparation techniques and roughness[J]. Case studies in construction materials, 2024, 21:e03549. [24].黄璐, 卓卫东, 上官萍, 等. 新旧混凝土黏结面剪切强度的改进计算式[J]. 工业建筑, 2018, 48(8):202-207, 212. |
| 备注/Memo: | 收稿日期：2025−10−27 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目：宁波大学—誉和磐璟科研创新合作平台项目（XQ2022000018） 第一作者：潘白露，硕士研究生，主要研究方向为混凝土力学性能。E-mail: 1193918770@qq.com *通信作者：宋晓刚，副教授，主要研究方向为混凝土力学性能。E-mail: songxiaogang@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
