|Table of Contents|

Prediction model for restraint stress and reinforcement bond strength of grouted sleeves with defects under cycling loading(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年04期
Page:
51-62
Research Field:
建筑结构
Publishing date:

Info

Title:
Prediction model for restraint stress and reinforcement bond strength of grouted sleeves with defects under cycling loading
Author(s):
LIU Qizhou1;  LI Jinzhou1;  WU Bocheng1;  YANG Chengjian1;  YANG Zuodong2;  XIONG Yu3;  ZHANG Lu1
(1. School of Civil Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China; 2. Hechi Urban and Rural Construction Investment Group Co., Ltd, Hechi 547000, Guangxi, China; 3. Infrastructure Office, Hechi University, Hechi 546399, Guangxi, China)
Keywords:
grouted sleeve;  grouting defect;  cycling loading;  restraint stress;  prediction model
PACS:
TU375
DOI:
10.19815/j.jace.2022.08019
Abstract:
In order to establish a prediction model for the bond strength between grout and rebar in grouted sleeves with defects under cycling seismic loading, the restraint system of the sleeve was analyzed, and the defects were classified according to the influence mechanism on the restraint system. The grouted sleeve specimens with defects were designed and investigated under cycling loading tests. The mathematical expression of the restraint stress of the grouted sleeve with defects was obtained. The prediction model of the ultimate bond strength of grout with defects was established by combining the mathematical expressions, and the correctness of the prediction model was verified by comparing with the test results. The results show that the imbalance of the sleeve restraint system caused by defects is an important cause of the deterioration of the sleeve bond performance. The defects concentrated on one side induce an imbalance of the sleeve restraint system, and therefore have a more significant effect on the deterioration of the bond performance than uniformly dispersed defects. As the defect rate increases, the failure mode of the specimen changes from reinforcement fracture failure to reinforcement pullout failure. When the restraint system of the defective sleeve is in equilibrium, the threshold defect rate for rebar pullout failure is approximately 30%. When the defect causes a severe imbalance in the sleeve restraint system, the threshold defect rate for rebar pullout failure is only 20%. The grouted end is the weak point where the sleeve restraint is the first to fail, so defects at the grouted end are more likely to induce connection failure than defects at the mechanical end. The prediction model can provide a theoretical reference for the performance evaluation of grout sleeve with defects in seismic zone.

References:

[1] YEE A A.Splice sleeve for reinforcing bars with cylindrical shell:US4627212[P].1986-12-09.
[2]EINEA A,YAMANE T,TADROS M K.Grout-filled pipe splices for precast concrete construction[J].PCI Journal,1995,40(1):82-93.
[3]LING J H,ABD RAHMAN A B,IBRAHIM I S,et al.Behaviour of grouted pipe splice under incremental tensile load[J].Construction and Building Materials,2012,33:90-98.
[4]KIM H K.Structural performance of steel pipe splice for SD500 high-strength reinforcing bar under cyclic loading[J].Architectural Research,2008,10:13-23.
[5]郑永峰,郭正兴,曹 江.新型灌浆套筒的约束机理及约束应力分布[J].哈尔滨工业大学学报,2015,47(12):106-111.
ZHENG Yongfeng,GUO Zhengxing,CAO Jiang.Confinement mechanism and confining stress distribution of new grouting coupler for rebars splicing[J].Journal of Harbin Institute of Technology,2015,47(12):106-111.
[6]黄 远,张 帆,易伟建.套筒约束灌浆料与钢筋黏结强度试验研究[J].湖南大学学报(自然科学版),2020,47(9):69-75.
HUANG Yuan,ZHANG Fan,YI Weijian.Experimental study on bond strength between sleeve confined grouting and steel bars[J].Journal of Hunan University(Natural Sciences),2020,47(9):69-75.
[7]XU T F,LI Q W,ZHAO R D,et al.On the early-age bond-slip behavior of an eccentric bar embedded in a grouted sleeve[J].Engineering Structures,2019,190:160-170.
[8]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.
ZHENG Qinglin,WANG Ni,TAO Li,et al.The analysis on classification and forming mechanism of factors that influence the mechanical performance of grout sleeve splicing[J].Sichuan Building Science,2017,43(3):5-9.
[9]渠 明,邵志伟,赵伟涛,等.灌浆套筒构件密实度超声波层析成像无损检测研究[J].工业建筑,2021,51(9):207-215.
QU Ming,SHAO Zhiwei,ZHAO Weitao,et al.Research on nondestructive testing of grouting sleeve members by ultrasonic tomography[J].Industrial Construction,2021,51(9):207-215.
[10]许国东,相秋迪,赵广志,等.X射线数字成像技术检测灌浆套筒施工质量的试验研究[J].建筑结构,2020,50(9):11-15,6.
XU Guodong,XIANG Qiudi,ZHAO Guangzhi,et al.Experimental study on construction quality of grouting sleeve detected by X-ray digital radiography technology[J].Building Structure,2020,50(9):11-15,6.
[11]XIE L L,WANG X Y,YANG C T,et al.Development and validation of a defect detection and repair method for half grouted sleeve connection[J].Case Studies in Construction Materials,2022,17:e01205.
[12]朱 虹,孙 瑜,董志强,等.基于压电陶瓷的灌浆套筒缺陷检测及应力传播模拟研究[J].建筑科学与工程学报,2022,39(4):117-126.
ZHU Hong,SUN Yu,DONG Zhiqiang,et al.Research on defect detection and stress propagation simulation of grouting sleeve based on piezoelectric ceramics[J].Journal of Architecture and Civil Engineering,2022,39(4):117-126.
[13]郑清林,王 霓,陶 里,等.灌浆缺陷对钢筋套筒灌浆连接试件性能影响的试验研究[J].建筑科学,2017,33(5):61-68.
ZHENG Qinglin,WANG Ni,TAO Li,et al.Experimental study on effects of grout defects on the connection behaviors of grout sleeve splicing for reinforcing bars[J].Building Science,2017,33(5):61-68.
[14]李向民,高润东,许清风,等.灌浆缺陷对钢筋套筒灌浆连接接头强度影响的试验研究[J].建筑结构,2018,48(7):52-56.
LI Xiangmin,GAO Rundong,XU Qingfeng,et al.Experimental study on influence of grouting defect on joint strength of grout sleeve splicing of rebars[J].Building Structure,2018,48(7):52-56.
[15]XIE L L,ZHONG B J,CHEN X,et al.Experimental investigation on the connection performance of defect detectable and repairable half-grouted sleeve under cyclic loads[J].Construction and Building Materials,2022,323:126593.
[16]XU F,WANG K,WANG S,et al.Experimental bond behavior of deformed rebars in half-grouted sleeve connections with insufficient grouting defect[J].Construction and Building Materials,2018,185:264-274.
[17]CHEN J W,WANG Z W,LIU Z Y,et al.Experimental investigation of mechanical behaviour of rebar in steel half-grouted sleeve connections with defects in water/binder ratio[J].Structures,2020,26:487-500.
[18]UNTRAUER R E,HENRY R L.Influence of normal pressure on bond strength[J].ACI Journal Proceedings,1965,62(5):577-586.
[19]Steels for the reinforcement of concrete — reinforcement couplers for mechanical splices of bars — part 2:test methods:ISO 15835-2:2009[S].Geneva:International Organization for Standardization,2009.
[20]闫乾勋,刘荣桂,耿豪劼,等.灌浆缺陷对全灌浆钢筋套筒连接性能影响[J].科学技术与工程,2022,22(11):4459-4466.
YAN Qianxun,LIU Ronggui,GENG Haojie,et al.Influence of grouting defects on the connection performance of fully grouted reinforcement sleeve[J].Science Technology and Engineering,2022,22(11):4459-4466.
[21]吴 涛,王 珅,刘毅斌,等.钢筋套筒灌浆连接件的力学性能[J].建筑科学与工程学报,2019,36(2):21-29.
WU Tao,WANG Shen,LIU Yibin,et al.Mechanical performance of reinforcement grouted sleeve connection[J].Journal of Architecture and Civil Engineering,2019,36(2):21-29.
[22]戴绍斌,郑小林,黄 俊,等.组合方形灌浆套筒连接性能试验[J].建筑科学与工程学报,2020,37(2):54-61.
DAI Shaobin,ZHENG Xiaolin,HUANG Jun,et al.Experiment on behavior of composite square grout-filled pipe splice[J].Journal of Architecture and Civil Engineering,2020,37(2):54-61.
[23]高 强,赵唯坚.高应力反复拉压作用下堆焊成型套筒灌浆连接性能试验研究[J].建筑结构学报,2022,43(4):220-227.
GAO Qiang,ZHAO Weijian.Experimental study on performance of grouted sleeve connection with surfacing forming under high stress repeated tension-compression load[J].Journal of Building Structures,2022,43(4):220-227.
[24]郑永峰.GDPS灌浆套筒钢筋连接技术研究[D].南京:东南大学,2016.
ZHENG Yongfeng.Research on rebar splicing system by GDPS grout-filled coupling sleeve[D].Nanjing:Southeast University,2016.
[25]ZHENG G Y,KUANG Z,XIAO J Z,et al.Mechanical performance for defective and repaired grouted sleeve connections under uniaxial and cyclic loadings[J].Construction and Building Materials,2020,233:117233.

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Last Update: 2024-07-20