钢筋混凝土的负泊松比设计与抗弯性能研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (5): 1640-1649.

所属专题：水泥混凝土

钢筋混凝土的负泊松比设计与抗弯性能研究

赵飞¹, 朱鹏飞¹, 李梦瑶¹, 马衍轩^1,2, 张建³, 吴磊³

1.青岛理工大学土木工程学院,青岛 266520;
2.海洋环境混凝土技术教育部工程研究中心,青岛 266520;
3.青岛青新阳光集团有限公司,青岛 266404

收稿日期:2023-01-04 修订日期:2023-02-28 出版日期:2023-05-15 发布日期:2023-06-01
通信作者: 马衍轩,博士,副教授。E-mail:yxma@qut.edu.cn
作者简介:赵飞(1998—),男,硕士研究生。主要从事负泊松比水泥基材料方面的研究。E-mail:nicklaus_zz@163.com
基金资助:
国家自然科学基金(51408330);山东省自然科学基金(ZR2022ME121);海洋环境混凝土技术教育部工程研究中心开放课题(TMduracon2022010);青岛西海岸新区2020年科技计划专项(2020-38)

Negative Poisson Ratio Design and Flexural Performance of Reinforced Concrete

ZHAO Fei¹, ZHU Pengfei¹, LI Mengyao¹, MA Yanxuan^1,2, ZHANG Jian³, WU Lei³

1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China;
2. Engineering Research Center of Concrete Technology Under Marine Environment, Ministry of Education, Qingdao 266520, China;
3. Qingdao Qingxin Sunshine Group Co., Ltd., Qingdao 266404, China

Received:2023-01-04 Revised:2023-02-28 Online:2023-05-15 Published:2023-06-01

摘要/Abstract

摘要： 将钢筋混凝土的方形结构箍筋改变为六肋结构、星形结构,设计制备出拥有负泊松比效应的钢筋混凝土梁。通过三点弯曲试验和落锤冲击试验数值模拟分析混凝土的抗弯性能,同时通过数字散斑相关方法分析其变形行为以及泊松比。结果表明:六肋结构和星形结构的箍筋能够提高混凝土的抗弯承载力,延缓其裂缝开展,提高其能量吸收率与弯曲韧性,星形箍筋的钢筋混凝土抗弯承载力和弯曲韧性系数分别可达22.6 kN及3.86 MPa;随箍筋结构中内凹角数量的增加,混凝土的抗弯性能增强,泊松比反而减小,且星形箍筋的钢筋混凝土甚至出现了负泊松比的现象,泊松比最小可达－0.03。

关键词: 异形箍筋, 负泊松比, 变形行为, 抗弯性能, 落锤冲击, 数字散斑

Abstract: The reinforced concrete beam with negative Poisson ratio effect was designed and fabricated by changing the square stirrup of reinforced concrete into six-ribbed structure and star-shaped structure. The flexural performance of concrete was simulated by three-point bending test and drop hammer impact test, and its deformation behavior and Poisson ratio were analyzed by digital speckle correlation method. The results show that the stirrups of six-ribbed structure and star-shaped structure can improve the flexural capacity of concrete, delay the development of cracks, and improve energy absorption rate and flexural toughness. The flexural capacity and coefficient of flexural toughness of star-shaped reinforced concrete are up to 22.6 kN and 3.86 MPa, respectively. With the change of stirrup structure, the flexural performance of concrete is enhanced, but the Poisson ratio decreases, and the phenomenon of negative Poisson ratio even appears in reinforced concrete with star-shaped stirrup. The minimum Poisson ratio can reach －0.03.

Key words: irregular-shaped stirrup, negative Poisson ratio, deformation behavior, flexural performance, drop hammer impact, digital speckle

中图分类号:

TU528

赵飞, 朱鹏飞, 李梦瑶, 马衍轩, 张建, 吴磊. 钢筋混凝土的负泊松比设计与抗弯性能研究[J]. 硅酸盐通报, 2023, 42(5): 1640-1649.

ZHAO Fei, ZHU Pengfei, LI Mengyao, MA Yanxuan, ZHANG Jian, WU Lei. Negative Poisson Ratio Design and Flexural Performance of Reinforced Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(5): 1640-1649.

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钢筋混凝土的负泊松比设计与抗弯性能研究

Negative Poisson Ratio Design and Flexural Performance of Reinforced Concrete

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