Study on Failure Evolution Law of Reinforcing Bar Connection Interface of Precast Structure
[1]Li Yue,Meng Wenjun,Gao Chongming,et al.Study on Failure Evolution Law of Reinforcing Bar Connection Interface of Precast Structure[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):25-30.[doi:10.13705/j.issn.1671-6833.2021.02.010]
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42
Number of periods:
2021 02
Page number:
25-30
Column:
Public date:
2021-04-12
- Title:
- Study on Failure Evolution Law of Reinforcing Bar Connection Interface of Precast Structure
- Keywords:
- anchor connection; DSCM; drawing test; deformation field; strain field
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2021.02.010
- Abstract:
- In order to obtain the failure evolution law of the reinforced grout anchor connection interface of prefabricated concrete structures,a longitudinal steel bar anchor connection test was carried out on a prefabricated concrete structure by the digital speckle correlation method (DSCM).By observing the failure process of steel bar anchor connection and analyzing the speckle image, the evolution characteristics of the stress of the fabricated concrete structure anchor, the evolution characteristics of the force field of the anchor system, and the evolution characteristics of the strain field of the anchor system were studied.The results showed that: ① The thickness of the anchoring agent would affect the failure mode and the ultimate bearing capacity of the anchoring system. ② In the anchoring system, the pulling force was continuously transmitted along the steel bar from the loaded end to the free end, and the greater the thickness of the anchoring agenthas, the greater the transmission rangeis. ③ During the drawing process, the deformation of the anchoring system was mainly concentrated at the interface between the anchoring agent and the concrete, and expanded along the steel bar to the inside of the system as the load increases. ④ Under the pulling force, in the initial, the first principal strain and the maximum shear strain mainly existed in the grouting area around the reinforcement at the loading end. As the pulling force increased, the strain expanded to the bonding interface between the concrete matrix and the grouting material until it connects with the strain at the bonding interface.
- References:
-
[1] 张立,袁永强.装配式剪力墙连接国内研究现状及展望[J].河南科技学院学报(自然科学版),2019,47(3):22-27.[2] 祝雯,黄石明,高梓贤.装配式混凝土结构钢筋套筒灌浆料的研究现状及发展趋势[J].广州建筑,2017,45(3):22-26.[3] 周金富,潘阿二.预制混凝土结构浆锚连接锚固性能综述[J].工业技术创新,2019,6(3):103-106.[4] 王明恕,何修仁,郑雨天.全长锚固锚杆的力学模型及其应用[J].金属矿山,1983(4):24-29.[5] 尤春安,战玉宝,刘秋媛，等.预应力锚索锚固段的剪滞-脱黏模型[J].岩石力学与工程学报,2013,32(4):800-806.[6] 朱自强,何现启.全长锚固锚杆拉拔试验研究[J].探矿工程(岩土钻掘工程),2005,32(增刊1):115-118.[7] 刘立新,赵镇,张龑,等.带扩大套头钢筋机械锚固性能的试验研究[J].郑州大学学报(工学版),2008,29(3):103-107.[8] 朱焕春,荣冠,肖明,等.张拉荷载下全长粘结锚杆工作机理试验研究[J].岩石力学与工程学报,2002,21(3):379-384.[9] 孟利波,马少鹏,金观昌.数字散斑相关测量中亚像素位移测量方法的比较[J].实验力学,2003,18(3),:343-348.[10] 芮嘉白,金观昌,徐秉业.一种新的数字散斑相关方法及其应用[J].力学学报,1994,26(5):599-607.[11] LU H,CARY P D.Deformation measurements by digital image correlation:implementation of a second-order displacement gradient[J].Experimental mechanics,2000,40(4):393-400.[12] 刘光利,姜红艳.数字散斑相关方法的原理及土木工程应用简介[J].安徽建筑大学学报,2015,23(6):52-58,62.[13] ZHANG J,SWEEDY A,GITZHOFER F,et al.A novel method for repeatedly generating speckle patterns used in digital image correlation[J].Optics and lasers in engineering,2018,100:259-266.[14] 张昕,乐金朝,刘汉东.PIV测量技术在锚板板周土体变形场研究中的应用[J].郑州大学学报(工学版),2011,32(5):20-23.
- Similar References:
Memo
-
Last Update:
2021-05-30