[1]吴子东,何 岸,叶嘉彬.灌浆缺陷对钢筋套筒动态连接性能的影响[J].华南地震,2023,(02):143-150.[doi:10.13512/j.hndz.2023.02.16]
 WU Zidong,HE An,YE Jiabin.Influence of Grouting Defects on Dynamic Connection Performance of Steel Sleeve[J].,2023,(02):143-150.[doi:10.13512/j.hndz.2023.02.16]
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灌浆缺陷对钢筋套筒动态连接性能的影响()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2023年02期
页码:
143-150
栏目:
土木工程防震减灾
出版日期:
2023-06-20

文章信息/Info

Title:
Influence of Grouting Defects on Dynamic Connection Performance of Steel Sleeve
文章编号:
1001-8662(2023)02-0143-08
作者:
吴子东1何 岸1叶嘉彬2
1.华南理工大学土木与交通学院,广州510641;2.广州机施建设集团有限公司,广州 510700
Author(s):
WU Zidong12HE An12YE Jiabin3
1.School of Civil Engineering&2.Transportation , South China University of Technology , Guangzhou 510641, China;3.Guangzhou Machinery Construction Group Co., Ltd., Guangzhou 510710, China
关键词:
灌浆缺陷钢筋套筒连接件动态力学性能粘结滑移曲线
Keywords:
Grouting defectsSteel sleeve connectorDynamic mechanical propertiesBond slip curve
分类号:
TU398+.2
DOI:
10.13512/j.hndz.2023.02.16
文献标志码:
A
摘要:
为了研究灌浆缺陷对钢筋套筒动态连接性能的影响,对22个带缺陷的钢筋套筒试件进行拉伸试验,分析缺陷类型、缺陷尺寸、加载速率对钢筋套筒试件连接性能的影响规律。结果表明:钢筋套筒的连接承载力与缺陷尺寸呈负相关,其中中部缺陷影响最大,端部缺陷次之,厚度缺陷最小;试件的粘结强度与钢筋的锚固长度l呈负相关,锚固长度每减小0.5d,粘结强度平均增大0.9MPa。试件的粘结强度与加载速率呈正相关,高速率试件粘结强度平均增大8%;随着钢筋与灌浆料滑移量的增大,两者之间的粘结力先增后减,呈现有规律的变化。最后归纳总结出考虑缺陷类型和加载速率的钢筋套筒粘结强度公式以及试验相关的钢筋与灌浆料的粘结强度-滑移曲线。
Abstract:
In order to study the influence of grouting defects on the dynamic connection performance of steel sleeve,tensile tests were conducted on 22 steel sleeve specimens with defects,and the influence of defect types, defect sizes,and loading rates on the connection performance of steel sleeve specimens were analyzed. The results show that there is a negative correlation between the connection bearing capacity of the steel sleeve and the defect size,with the central defect having the greatest impact,the end defect taking the second place,and the thickness defect being the smallest;the bond strength of the specimen is negatively correlated with the anchor length of the reinforcement, which increases by an average of 0.9 MPa for each 0.5 d decrease in the anchor length. The bond strength of the specimen is positively correlated with the loading rate, and the bond strength of the high-speed specimen increases by an average of 8%; with the increase of slip between the reinforcement and the grouting material increases, the cohesive force between the two increases first and then decreases, showing a regular change. Finally, the bond strength formula of steel sleeve considering defect type and loading rate and the bond strength-slip curve of steel bar and grouting material related to the test are summarized.

参考文献/References:

[1] Ling J H,Rahman A B A,Ibrahim I S. Feasibility study of grouted splice connector under tensile load[J]. Construction and Building Materials,2014(50):530-539.[2] Haber Z B,Saudi M S,Sanders D H. Behavior and simplified modeling of mechanical reinforcing bar splices[J]. ACI Structural Journal,2015,112(2):179.[3] Seo S Y,Nam B R,Kim S K. Tensile strength of the grout-filled head-splice-sleeve[J]. Construction and building mat-erials,2016(124):155-166.[4]陈海彬,武立伟.苏幼坡钢管灌浆套筒连接受拉性能的试验研究[J].世界地震工程,2016,32(2):18-24.[5]王国庆.钢筋套筒灌浆连接高温性能试验研究[D].苏州:苏州科技大学,2017.[6]郑清林,王霓,陶里,等.灌浆套筒力学性能影响因素分类及其机理分析[J].四川建筑科学研究,2017,43(3):5-9.[7]陈曦,苗启松,杨参天,等.缺陷可检修型半灌浆套筒连接拉伸性能试验研究[J].工程力学,2020,37(9):199.[8] Ahn B I,Kim H K,Park B M. Confining effect of mortar grouted splice sleeve on reinforcing bar[J]. Journal of the Korea Concrete Institute,2003,15(1):102-109[9]闫东明,林皋,王哲,等.不同应变速率下混凝土直接拉伸试验研究[J].土木工程学报,2005(06):97-103.

相似文献/References:

[1]周文轩.钢筋套筒灌浆连接受拉性能数值模拟[J].华南地震,2022,(01):127.[doi:10.13512/j.hndz.2022.01.17]
 ZHOU Wenxuan.Numerical Sulation of Tensile Behavior of Steel Sleeve Grouting Connection[J].,2022,(02):127.[doi:10.13512/j.hndz.2022.01.17]

备注/Memo

备注/Memo:
收稿日期:2022-12-15基金项目:国家自然科学基金项目(52108143)作者简介:吴子东(1997-),男,硕士研究生,主要从事装配式结构的研究。E-mail:253014250@qq.com通信作者:何岸(1988),男,副教授,主要从事钢—混凝土组合结构、装配式结构的研究。E-mail:hean@scut.edu.cn
更新日期/Last Update: 2023-06-15