带衬套灌浆锚杆在砖砌体中拉拔性能试验研究

敬登虎; 朱其一; 石运; 汪方勇

doi:10.3724/j.gyjzG23080905

带衬套灌浆锚杆在砖砌体中拉拔性能试验研究

doi: 10.3724/j.gyjzG23080905

1. 东南大学土木工程学院, 南京 211189;
2. 中国建筑科学研究院有限公司, 北京 100013;
3. 江苏筑镹营造科技有限公司, 南京 210019

基金项目:

国家自然科学基金项目（52178118）。

详细信息

作者简介:
敬登虎，工学博士，副教授，主要从事工程结构鉴定与加固技术研究。jingdh@seu.edu.cn

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出版历程
- 收稿日期: 2023-08-09
- 网络出版日期: 2024-05-29

Experimental Research on Pull-Out Performance of Grouted Anchor Rods with Bushings Inside Brick Masonry

1. School of Civil Engineering, Southeast University, Nanjing 211189, China;
2. China Academy of Building Research, Beijing 100013, China;
3. Jiangsu Zhujiu Conservation Technology Co., Ltd., Nanjing 210019, China

摘要

摘要: 带衬套灌浆锚杆是一种可用于加固修复且不改变大体积砖砌体文物建筑外貌的新型技术。为了研究带衬套灌浆锚杆在砖砌体中的拉拔性能，以灰缝饱满度、锚固深度、钻孔直径以及锚固方向为研究参数，设计并完成了21根锚杆的拉拔试验，分析了锚杆的破坏形态、拔出力–滑移曲线、锚筋应变和界面黏结应力分布以及峰值拔出力。试验结果表明：带衬套灌浆锚杆与砖砌体的拔出力–滑移曲线呈现明显的四段线特征；锚杆中锚筋不易屈服；灰缝饱满度和钻孔直径对锚杆的破坏形态有直接影响；锚杆的峰值拔出力与锚固深度存在非线性增长关系；灰缝饱满度高、钻孔直径大，锚杆的峰值拔出力高；竖向锚杆的峰值拔出力明显高于水平向锚杆。
- 带衬套灌浆锚杆 /
- 砖砌体 /
- 灰缝饱满度 /
- 锚固深度 /
- 钻孔直径 /
- 拉拔性能
Abstract: The technique of grouted anchor rods with bushings is a new strengthening and repair technique that can be used for repairing mass brick masonry ancient buildings without damaging their appearance. In order to study the pull-out performance of grouted anchor rods inside historic masonry, pull-out tests on 21 anchor rods with the fullness of mortar joints, anchoring depth, drilling diameter and anchorage direction as research parameters were designed and completed, and the failure modes of anchor rods, pull-out force-slip curves, the distribution of anchor bar strains as well as interface bonding stresses and peak pull-out forces were analyzed. The test results showed that the pull-out force-slip curves of grouted anchor rods with bushings exhibited distinct four-stage characteristics; the anchor bars within the anchor rods showed resistance to yielding; the failure modes of anchor rods were directly affected by the fullness of mortar joints and the drilling diameter; the peak pull-out forces of anchor rods had a non-linear growth relation with the anchorage depth; the peak pull-out forces of anchor rods with high fullness of mortar joints and large drilling diameter were high; and compared with horizontal anchor rods, the peak pull-out forces of vertical anchor rods were significantly higher.
- grouted anchor rod with bushing /
- brick masonry /
- fullness of mortar joint /
- anchoring depth /
- drilling diameter /
- pull-out performance

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参考文献(27)

[1]	侯卫东.中国古代砖石建筑及其保护修复概述[J].中国文物科学研究, 2012, 26(2):50-53.
[2]	张金风.砖石结构古建筑修缮中的规范应用问题[J].文物保护与考古科学, 2010, 22(2):79-86.
[3]	中华人民共和国住房和城乡建设部,中华人民共和国国家质量监督检验检疫总局.砌体结构加固设计规范:GB 50702-2011[S].北京:中国建筑工业出版社, 2011.
[4]	陈溪,李向民,许清风.高性能纤维增强水泥基复合材料条带加固砖砌体墙抗震性能试验研究[J].工业建筑, 2019, 49(6):20-25 , 106.
[5]	石运,敬登虎.预应力钢板带加固砖砌体墙抗剪承载力计算方法[J].工业建筑, 2021, 51(11):195-199.
[6]	DADRAS E S, MASIA M J, TOTOEV Y Z, et al. Effect of retrofitting on the structural factors for seismic assessment of unreinforced masonry structures:a review[J]. Australian Journal of Structural Engineering, 2019, 20(1):26-53.
[7]	殷惠君.建筑结构加固、改造综合技术研究[D].上海:同济大学, 2009:225.
[8]	敖迎阳.平遥古城墙裂缝成因分析及处理对策[D].北京:北京交通大学, 2008:51-52.
[9]	王善伟,王社良,杨涛,等.古砖墙注浆加固性能试验及滞回模型研究[J].哈尔滨工程大学学报, 2020, 41(9):1295-1302.
[10]	ALGERI C, POVERELLO E, PLIZZARI G, et al. Experimental study on the injected anchors behaviour on historical masonry[J]. Advanced Materials Research, 2010, 133-134:423-428.
[11]	PAGANONI S, D'AYALA D. Testing and design procedure for corner connections of masonry heritage buildings strengthened by metallic grouted anchors[J]. Engineering Structures, 2014, 70:278-293.
[12]	FRANCESCA S, PAOLO R, GIACOMO P, et al. Experimental study on injected anchors for the seismic retrofit of historical masonry buildings[J]. International Journal of Architectural Heritage, 2015, 10(1/2/3/4):182-203.
[13]	MOREIRA S, RAMOS L F, OLIVEIRA D V, et al. Experimental behavior of masonry wall-to-timber elements connections strengthened with injection anchors[J]. Engineering Structures, 2014, 81:98-109.
[14]	GIGLA B. Bond strength of injection anchors as supplementary reinforcement inside historic masonry[C]//Proceedings of 13th International Brick and Block Masonry Conference. Amsterdam:2004:1-10.
[15]	PANIZZA M, GIRARDELLO P, GARBIN E, et al. On-site pull-out tests of steel anchor spikes applied to brickwork masonry[J]. Key Engineering Materials, 2015, 624:266-274.
[16]	CERONI F, CUZZILLA R, PECCE M. Assessment of performance of steel and GFRP bars as injected anchors in masonry walls[J]. Construction and Building Materials, 2016, 123:78-98.
[17]	CERONI F, DI LUDOVICO M, BALSAMO A. Effectiveness of design formulations for injected anchors in masonry elements[J]. Journal of Building Pathology Rehabilitation, 2020, 5(1):1-12.
[18]	GIRESINI L, PUPPIO M L, TADDEI F. Experimental pull-out tests and design indications for strength anchors installed in masonry walls[J]. Materials Structures, 2020, 53(4):1-16.
[19]	周彬,吕西林,任晓崧.既有砌体结构墙体植筋拉拔性能的理论分析与试验研究[J].建筑结构学报, 2012, 33(11):132-141.
[20]	颜胜蓝.砌体的化学植筋后锚固受拉试验研究[D].长沙:湖南大学, 2015.
[21]	汪方勇,吴真.工业遗址改造中烟囱体内隐形锚杆加固技术研究[J].施工技术(中英文), 2021, 50(21):1-3.
[22]	ASTM. Standard test methods for field testing of anchors in concrete or masonry:E3121/E3121M-17[S]. Pennsylvania:American Society for Testing and Materials, 2017.
[23]	ASTM. Standard test methods for strength of anchors in concrete elements:E488/E488M-22[S]. Pennsylvania:American Society for Testing and Materials, 2022.
[24]	中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.烧结普通砖:GB/T 5101-2017[S].北京:中国标准出版社, 2018.
[25]	中华人民共和国住房和城乡建设部.建筑砂浆基本性能试验方法标准:JGJ/T 70-2009[S].北京:中国建筑工业出版社, 2009.
[26]	国家市场监督管理总局,中国国家标准化管理委员会.金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1-2021[S].北京:中国建筑工业出版社, 2021.
[27]	国家市场监督管理总局,中国国家标准化管理委员会.水泥胶砂强度检验方法(ISO法):GB/T 17671-2021[S].北京:中国建筑工业出版社, 2021.