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[1]向绪儒,顾箭峰*,李佳栩,等.灌浆缺陷对半灌浆套筒连接件强度的影响[J].武汉工程大学学报,2021,43(06):657-663.[doi:10.19843/j.cnki.CN42-1779/TQ.202109019]
 XIANG Xuru,GU Jianfeng*,LI Jiaxu,et al.Influence of Grouting Defects on Strength of Semi-Grouting Sleeve Connections[J].Journal of Wuhan Institute of Technology,2021,43(06):657-663.[doi:10.19843/j.cnki.CN42-1779/TQ.202109019]
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灌浆缺陷对半灌浆套筒连接件强度的影响(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
43
期数:
2021年06期
页码:
657-663
栏目:
资源与环境工程
出版日期:
2021-12-31

文章信息/Info

Title:
Influence of Grouting Defects on Strength of Semi-Grouting Sleeve Connections
文章编号:
1674 - 2869(2021)06 - 0657 - 07
作者:
向绪儒1顾箭峰*1李佳栩2卢海林1杨宏印1
1. 武汉工程学土木工程与建筑学院,湖北 武汉 430074;2. 武汉建工集团股份有限公司,湖北 武汉 430023
Author(s):
XIANG Xuru1GU Jianfeng*1LI Jiaxu1LU Hailin1YANG Hongyin1
1. School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China;2. Wuhan Construction Engineering Company Limited, Wuhan 430023, China
关键词:
灌浆缺陷半灌浆套筒连接件拉伸强度
Keywords:
grouting defect semi-grouting sleeve connection tensile strength
分类号:
TU317
DOI:
10.19843/j.cnki.CN42-1779/TQ.202109019
文献标志码:
A
摘要:
为研究半灌浆套筒连接件受灌浆缺陷影响的规律,对含端部、中部和均布灌浆缺陷及灌浆饱满的连接件进行单向拉伸试验,通过有限元软件分析研究灌浆缺陷类型和缺陷尺寸对连接件拉伸强度的影响。结果表明:灌浆缺陷导致半灌浆套筒连接件拉伸强度降低,相同尺寸的均布缺陷对C25 连接件拉伸强度影响最大,中部缺陷次之,端部缺陷最小。随着灌浆缺陷长度的增大,含灌浆缺陷连接件的破坏形态均由钢筋拉断破坏转变为钢筋拔出破坏。并且,连接件屈服强度和极限抗拉强度的降低速率与灌浆缺陷类型相关,含均布缺陷的连接件降低最快,含端部缺陷的连接件最慢。为确保C25 半灌浆套筒连接件满足I 级接头要求,含端部、中部和均布灌浆缺陷的连接件钢筋最小锚固长度分别为125、150 和175 mm。
Abstract:
To study the effect of grouting defects on tensile strength of semi-grouting sleeve connection, uniaxial tension tests were carried out on connections with end, middle and uniformly distributed grouting defects, together with fully grouted connections. The influences of the type and dimension of grouting defects on tensile strength of connections were additionally analyzed by finite element software. The results show that the presence of grouting defects degrades the tensile strength of semi-grouting sleeve connections. Moreover, the uniformly distributed grouting defect has the most negative effect on the tensile strength of C25 connections, followed by the middle defect, and the end defect is the least. With the increase of the defect’s dimension, the failure modes of connections transform from the steel bar fracture to the grouting end pull-out. Additionally, the reduction rates of the yield strength and the ultimate tensile strength of connections are related to the type of grouting defects. The tensile property of connections with uniformly distributed grouting defects shows the most seriously degradation, and those with end defects show the slowest degradation. Finally, to meet the standard requirement of grade I joint for C25 semi-grouting sleeve connections, the minimum anchorage lengths of the connections with end, middle and uniformly distributed grouting defects are 125, 150 and 175 mm, respectively.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-09-25基金项目:武汉市城建委科技项目(201804);广西玉林市科学研究与技术开发计划项目(玉市科20202927)作者简介:向绪儒,硕士研究生。E-mail:1173819960@qq.com*通讯作者:顾箭峰,博士,副教授。 E-mail:gjfcqucdu@wit.edu.cn引文格式:向绪儒,顾箭峰,李佳栩,等. 灌浆缺陷对半灌浆套筒连接件强度影响研究[J]. 武汉工程大学学报,2021,43(6):657-663.
更新日期/Last Update: 2021-12-27