UHPC纤维定向法及对受拉性能影响

doi:10.3969/j.issn.1674-0696.2021.05.12

重庆交通大学学报（自然科学版） ›› 2021, Vol. 40 ›› Issue (05): 74-80.DOI: 10.3969/j.issn.1674-0696.2021.05.12

UHPC纤维定向法及对受拉性能影响

张阳1，屈少钦1，卢九章2，霍文斌3

(1. 湖南大学风工程与桥梁工程湖南省重点实验室，湖南长沙 410082；2. 北京市政路桥管理养护集团，北京 100097； 3. 广东省建筑设计院有限公司，广东广州 510010)

收稿日期:2019-12-22 修回日期:2020-05-22 出版日期:2021-05-17 发布日期:2021-05-18
作者简介:张阳（1971—），男，辽宁辽阳人，副教授，博士，主要从事超高性能混凝土在桥梁应用方面的研究。E-mail：zhangbridge@163.com
基金资助:
国家自然科学基金项目（51778221）；广州市工业技术重大研究项目（201902010019）；北京市政路桥养护管理集团有限公司研究项目（2018-04）

Method of Fiber Aligning in UHPC and Its Influence on the Tensile Performance

ZHANG Yang1, QU Shaoqin1, LU Jiuzhang2, HUO Wenbing3

(1. Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, Hunan, China; 2. Beijing Municipal Road & Bridge Maintenance Management Group Co., Ltd., Beijing 100097, China; 3. Architectural Design and Research Institute of Guangdong Provice Co.,Ltd., Guangzhou 510010, Guangdong, China)

Received:2019-12-22 Revised:2020-05-22 Online:2021-05-17 Published:2021-05-18
Supported by:

摘要/Abstract

摘要： 基于新拌UHPC流动改变内部纤维取向的特性，采用通道流动结合振动的方法，实现UHPC的纤维定向浇筑，并采用图像分析技术测量了纤维定向浇筑对UHPC内部纤维取向的影响，利用抗折试验和轴拉试验测量了纤维取向对UHPC抗拉性能的影响，最后提出了用于定量评估纤维取向对UHPC抗拉强度影响的指标。研究结果表明：常规浇筑下UHPC的纤维取向系数为0.487，接近0.5，纤维定向浇筑的UHPC的纤维取向系数达到了0.731；具有纤维定向效果的UHPC开裂强度提升24%，抗拉强度和抗折强度分别提升66%、71%；评估UHPC抗拉性能的指标计算出的强度提升约为69%左右，与实测值相近，可认为是一个可靠的用以定量评估纤维取向对UHPC抗拉强度影响的指标。

关键词: 桥梁工程, 超高性能混凝土（UHPC）, 纤维定向, 图像分析, 评估模型, 受拉性能

Abstract: Based on the characteristics that the flow of fresh-mixed UHPC changes the orientation of inner fibers, the method of channel flow combining with the vibration was used to realize the fiber aligning casting of UHPC. The effect of fiber aligning casting on the inner fiber orientation of UHPC was measured by image analysis, and the effect of fiber orientation on tensile properties of UHPC was measured by bending test and axial tensile test. Finally, the index for quantitative evaluation of the influence of fiber orientation on the tensile strength of UHPC was proposed. The research results show that the fiber orientation coefficient of UHPC under the conventional casting is 0.487, which is close to 0.5; while the fiber orientation coefficient of UHPC under fiber aligning casting reaches 0.731. With the effect of fiber aligning, the cracking strength of UHPC is increased by 24%, and the tensile strength and flexural strength of that are increased by about 66% and 71% respectively. About 69% increment for UHPCs tensile strength by fiber aligning is calculated by aforementioned quantitative evaluation index, which is close to the measured value and can be considered as a reliable index to quantitatively evaluate the influence of fiber orientation on the tensile strength of UHPC.

Key words: bridge engineering, ultra-high performance concrete (UHPC), fiber aligning, image analysis, assessment model, tensile performance

中图分类号:

TU528.572

张阳1，屈少钦1，卢九章2，霍文斌3. UHPC纤维定向法及对受拉性能影响[J]. 重庆交通大学学报（自然科学版）, 2021, 40(05): 74-80.

ZHANG Yang1, QU Shaoqin1, LU Jiuzhang2, HUO Wenbing3. Method of Fiber Aligning in UHPC and Its Influence on the Tensile Performance[J]. Journal of Chongqing Jiaotong University(Natural Science), 2021, 40(05): 74-80.

参考文献

［1］ RICHARD P, CHEYREZY M. Composition of reactive powder concretes［J］.Cement and Concrete Research, 1995, 25(7): 1501-1511.
［2］慕儒, 邱欣, 赵全明, 等. 单向分布钢纤维增强水泥基复合材料 (I): 钢纤维方向控制［J］. 建筑材料学报, 2015, 18(2): 208-213.
MU Ru, QIU Xin, ZHAO Quanming, et al. Aligning steel fiber reinforced cement based composites (I): Orientation control of steel fibers［J］. Journal of building materials, 2015, 18(2): 208-213.
［3］ BOULEKBACHE B, HAMRAT M, CHEMROUK M, et al. Flowability of fiber-reinforced concrete and its effect on the mechanical properties of the material［J］.Construction and Building Materials, 2010, 24(9): 1664-1671.
［4］ KANG S T, KIM J K. The relation between fiber orientation and tensile behavior in an ultra high performance fiber reinforced cementitious composites (UHPFRCC)［J］.Cement and Concrete Research, 2011, 41(10): 1001-1014.
［5］ ROY M, HOLLMANN C, WILLE K. Influence of volume fraction and orientation of fibers on the pullout behavior of reinforcement bar embedded in ultra high performance concrete［J］. Construction and Building Materials, 2017, 146:
582-593.
［6］ MU R, LI H, QING L, et al. Aligning steel fibers in cement mortar using electro-magnetic field［J］.Construction and Building Materials, 2017, 131: 309-316.
［7］ FERRARA L, OZYURT N, PRISCO M D, et al. High mechanical performance of fibre reinforced cementitious composites: The role of "casting-flow induced" fiber orientation［J］. Materials and Structures, 2011, 44(1): 109-128.
［8］ GERMANO F. Cyclic Behavior of Steel Fiber Reinforced Concrete: From Material to Seismic Columns ［D］. Rome:University of Brescia, 2014.
［9］ TIBERTI G, GERMANO F, MUDADU A, et al. An overview of the flexural post-cracking behavior of steel fiber reinforced concrete［J］.Structural Concrete, 2018, 19(3): 695-718.
［10］ HUANG H H, GAO X J, LI L, et al. Improvement effect of steel fiber orientation control on mechanical performance of UHPC［J］.Construction and Building Materials, 2018,188: 709-721.
［11］曾晟,梁乃兴,杨遂中,等.HSI空间在低照度沥青混合料图像处理中的应用［J］.重庆交通大学学报(自然科学版),2020,39(11):86-91.
ZENG Sheng,LIANG Naixing,YANG Suizhong. Application of HSI color space in image processing of asphalt mixture under low illumination conditions［J］. Journal of Chongqing Jiaotong University(Natural Sciences). 2020,39(11):86-91.
［12］ AFNOR. Bétons Fibrés à ultra-hautes performances-SpCification, Performance, Production et Conformité: NF P18-470［S］. La Plaine St-Denis：AFNOR， 2016.
［13］ ALBERTI M G, ENFEDAQUE A, GALVEZ J C, et al. A review on the assessment and prediction of the orientation and distribution of fibers for concrete［J］.Composites Part B-engineering, 2018，151: 274-290.
［14］ LEE Y, KANG S T, KIM J K. Pullout behavior of inclined steel fiber in an ultra-high strength cementitious matrix［J］.Construction and Building Materials, 2010, 24(10): 2030-2041.
［15］ DUPONT D, VANDEWALLE L. Distribution of steel fibers in rectan-gular sections［J］. Cement and Concrete Composites, 2005, 27(3): 391-398.

[1]	周建庭1,2，黎娅2，张洪2，夏润川2，杨文琦2. 基于自发漏磁检测的钢绞线两点腐蚀试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(07): 74-81.
[2]	张华1，张正琦2 ，程高3，4，田伯科1. 黄土地区陡崖坡段桩基合理临坡距研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(07): 93-98.
[3]	刘金春，宋子轩，梁栋. 单箱三室连续梁桥在横向温度梯度与汽车偏载下的空间效应分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(06): 80-86.
[4]	郑植1,2，耿波2，袁佩2，李嵩林2，胡正涛3. 桥墩复合材料防船撞装置新型连接试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(05): 66-73.
[5]	傅立磊. 基于随机激励响应的参数识别相关函数法[J]. 重庆交通大学学报（自然科学版）, 2021, 40(04): 70-75.
[6]	苏小波1，肖林2. 空间刚架结构钢-混结合段合理构造模型试验和数值模拟研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(04): 76-82.
[7]	梁宗保1，柴洁1，纳守勇2，马天立1，唐玉1. 基于深度学习的桥梁健康监测数据有效性分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(03): 78-83.
[8]	唐启智1,辛景舟1,2,周建庭1,付雷1,3,张俊4. 基于时序分析的锈蚀RC拱损伤识别：仿真与验证[J]. 重庆交通大学学报（自然科学版）, 2021, 40(02): 69-77.
[9]	戎贤1,2，杨洪渭1，张健新1,2. 带钢端头的装配式混凝土梁柱中节点滞回性能试验研究[J]. 重庆交通大学学报（自然科学版）, 2021, 40(02): 78-82.
[10]	刘小会，许杨，陈思甜，徐略勤. 人行悬索桥地震响应分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(01): 65-71.
[11]	琚利平1，王银辉2，陆晓宏3，单继栋4. 行车落物作用下钢筋混凝土箱梁破坏形态分析[J]. 重庆交通大学学报（自然科学版）, 2021, 40(01): 72-78.
[12]	王桢1,2，周建庭1,3，张劲泉1,4，吴海军1，吴月星1. 现浇分段长度对万吨级平转斜拉桥受力的影响分析[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 44-52.
[13]	郝宪武，舒鹏，郝键铭. 大跨度非对称悬索桥的静风稳定性研究[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 53-59.
[14]	陈思甜，彭庆，杨敏. 亢谷景区大跨径人行玻璃悬索桥人致振动响应分析[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 60-66.
[15]	周术明1,2，颜东煌1. 钢筋混凝土简支预裂梁车辆静载模拟试验研究[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 67-73.

UHPC纤维定向法及对受拉性能影响

Method of Fiber Aligning in UHPC and Its Influence on the Tensile Performance

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics