陶粒混凝土复合叠浇试件黏结滑移性能研究
PDF下载 (310)桑琴扬,刘安庆,汪一鸣,王建民 *.陶粒混凝土复合叠浇试件黏结滑移性能研究[J].宁波大学学报(理工版),2018,31(5):56-62.DOI:
SANG Qin-yang,LIU An-qing,WANG Yi-ming,WANG Jian-min *.Study on bond-slip performance of ceramsite concrete and normal concrete graded pouring specimen[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(5):56-62.DOI:
| Title: | Study on bond-slip performance of ceramsite concrete and normal concrete graded pouring specimen |
| 作者: | 桑琴扬, 刘安庆, 汪一鸣, 王建民 * |
| Author(s): | SANG Qin-yang, LIU An-qing, WANG Yi-ming, WANG Jian-min * |
| 关键词: | 叠浇试件; 陶粒混凝土; 黏结滑移; 有限元模拟 |
| Keywords: | graded pouring specimen; ceramsite concrete; bond-slip performance; FEM simulation |
| 分类号: | TU502 |
| 文献标识码: | A |
| 摘要: | 装配式混凝土结构中, 使用陶粒混凝土与普通混凝土复合叠浇试件能有效减轻结构自重. 影响叠浇构件整体工作性能的关键因素是陶粒混凝土与普通混凝土叠浇结合面的黏结性能. 考虑叠合试件叠浇面的处理方式和叠浇间隔时间, 对陶粒混凝土与普通混凝土在叠浇面处的黏结滑移进行试验分析, 结合混凝土黏结机理, 拟合出陶粒混凝土与普通混凝土短龄期复合叠浇试件的黏结抗剪强度与叠浇间隔时间和黏结面处理方式的关系式. 建立有限元模型, 采用接触单元及库伦摩擦模型, 对叠浇试件的黏结滑移进行模拟验证. 结果表明: 随着叠浇间隔时间的增加, 叠合面处黏结强度逐渐降低, 当叠浇间隔时间超过2d后, 黏结强度逐渐趋于稳定; 使用露骨料水洗剂对界面进行处理比凿毛法更能有效提升黏结强度; 有限元模拟分析与试验结果相吻合. |
| Abstract: | In the prefabricated concrete structure, the use of ceramsite concrete and normal concrete composite graded pouring specimens can effectively reduce the dead loads of structures. The key factor that affects the overall working performance of the graded pouring component is the bonding performance of ceramsite concrete and normal concrete. In this paper, two factors are considered: the treatment method of overlapped specimen joint and the interval time of graded pouring. Combined with the concrete bonding mechanism on the basis of the experiments, the relation formula is obtained for the bond shear strength with regard to superposed pouring interval and bonding surface treatment method of ceramsite concrete and normal concrete with short age composite graded pouring specimens. Based on the experiment, a finite element model is established to analyze the bond-slip at the overlap surface between the ceramsite concrete and normal concrete. Results indicate that: With the increase of graded pouring interval, the bond strength of the overlap surface decreases gradually, and the bonding strength tends to be stable when the interval is more than 2 days; Using the interface cementing agent is more effective in improving the bond strength than the artificial chiseling; Finally, the finite element analysis agrees with the experiment result. |
| 参考文献 /References: | [1] 陈剑红. 浅论轻集料混凝土的应用与发展[J]. 科技资讯, 2009(24):1. [2] Iskhakov I, Ribakov Y A. Design method for two-layer beams consisting of normal and fibered high strength concrete[J]. Materials & Design, 2007, 28(5):1672-1677. [3] 周威, 郑文忠. 配筋梯度混凝土梁极限承载力分析[J]. 哈尔滨工业大学学报, 2012, 44(2):17-22. [4] 周威, 郑文忠. 配筋梯度混凝土梁裂缝宽度实用计算方法[J]. 土木工程学报, 2011, 44(5):42-49. [5] 张冰杰. 异强再生混凝土叠浇梁受弯性能研究[D]. 泉州: 华侨大学, 2013. [6] 杨丽丹. 异强叠浇复合混凝土梁抗剪性能研究[D]. 泉州: 华侨大学, 2014. [7] GB506666-2011. 混凝土结构工程施工规范[S]. [8] 汪一鸣, 刘安庆, 桑琴扬, 等. 不同剪跨比下陶粒混凝土叠浇梁抗剪性能试验研究[J]. 宁波大学学报(理工版), 2017, 30(5):58-63. [9] GB 500010-2010. 混凝土结构设计规范[S]. [10] CEB-FIP MC90. Design of concrete structures[S]. [11] 路晓宇, 王新敏. 基于ANSYS的梁―壳单元连接方法研究[J]. 建筑结构, 2017, 47(S2):561-566. [12] 林高峰. 考虑叠合面摩擦滑移的装配式混凝土结构性能与分析方法[D]. 杭州: 浙江大学, 2015. [13] 赵卫平. 基于ANSYS接触分析的黏结―滑移数值模拟[J]. 建筑科学与工程学报, 2011, 28(2):44-51. [14] 王金梅, 张迎宾, 赵兴权, 等. 用点接触模拟滑面的滑坡稳定性分析方法[J]. 岩土力学, 2017, 38(9):2746- 2756. [15] ACI318-95. Building code requirement for structural concrete[S]. [16] 王鹏. 混凝土收缩引起叠合面时变应力的仿真分析[D]. 武汉: 华中科技大学, 2006. |
| 备注/Memo: | 收稿日期: 2017－11－12. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省自然科学基金（LY18E080008）. 第一作者: 桑琴扬（1991－）, 男, 江西上饶人, 在读硕士研究生, 主要研究方向: 防灾减灾工程及防护工程. E-mail: 348130339@qq.com *通信作者: 王建民（1974－）, 男, 山西运城人, 副教授, 主要研究方向: 结构抗震与防灾减灾. E-mail: wangjianmin@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
