CFRP网格修复后多层砌体结构墙体的抗震性能

陶毅; 古金本; 信任; 姚继涛

doi:10.3969/j.issn.0258-2724.20170491

CFRP网格修复后多层砌体结构墙体的抗震性能

doi: 10.3969/j.issn.0258-2724.20170491

基金项目: 国家自然科学基金资助项目（51408478，51561135004，51508456）；中国博士后基金资助项目（2015M572529）

详细信息

作者简介:
陶毅（1982—），男，副教授，研究方向为高性能建筑材料应用，E-mail：y.tao@xauat.edu.cn

通讯作者:
信任（1983—），男，副教授，研究方向为结构抗震与减震加固工程，E-mail：xinren@xauat.edu.cn

中图分类号: TU364
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出版历程
- 收稿日期: 2017-07-10
- 修回日期: 2018-04-23
- 网络出版日期: 2018-05-22
- 刊出日期: 2019-12-01

Seismic Performance of Multi-storey Masonry Wall Repaired by Carbon Fiber Reinforced Polymer Grids

摘要

摘要: 为了研究碳纤维增强复合材料（CFRP）网格加固砌体结构的破坏机理及加固效果，通过拟静力试验将一片3层砌体开洞墙体加载至破坏，在破坏集中区域单面粘贴CFRP网格进行加固之后再次进行拟静力试验，以最小加固量为指标对加固前后墙体的抗震性能进行了对比分析，并提出了相应的加固建议. 研究结果表明：采用CFRP网格修复可以有效地阻止和延缓墙体受剪斜裂缝的出现及开展，从而提升了墙体的抗震性能，若以抗剪承载力完全恢复为指标，建议最小修复面积为22%；修复后墙体的破坏模式与修复位置相关，本试验以CFRP网格剥离及窗间墙破坏为主，破坏由低至高逐层发生，同层墙肢范围内，由未修复区向修复区发展；考虑窗间墙破坏易引起结构整体破坏和倒塌，因此应优先修复剪力较大层的窗间墙区域，并提供必要的加强措施.
- 多层砌体结构 /
- 碳纤维增强复合材料（CFRP）网格 /
- 抗震修复 /
- 拟静力试验
Abstract: To study the failure mechanism and repair effect of plain masonry structure repaired by carbon fiber reinforced polymer (CFRP) grids, firstly, a three-storey masonry wall with openings was destroyed under the pseudo-static action, then, the areas where the cracks intensively occurred in destroyed masonry wall were repaired by CFRP grids, at last, the pseudo-static action was retested. The seismic performances of the masonry wall prior to and after repair were compared according to the lower limit of repair requirements, and the repairing suggestions were proposed. The results show that CFRP grids can effectively retard or prevent the occurrence of masonry shear diagonal cracks, and then the seismic resistance of masonry walls is developed. The lower limit of repair area is 22% when the shear bearing capacity fully restored is the indicator. The failure modes of the walls after repaired are related to the repair positions, the CFRP grids debonding and piers failure are the majority failure modes of the test. The failures initiate layer by layer from low to high, and develop from the unrepaired to the repaired zones on the same floor. The piers failure is most likely to cause the structure failure or even collapse, therefore, CFRP grids need to be preferentially applied to the piers where the shear stress is relative large, the additional strengthening measures are also essential.
- masonry structure /
- carbon fiber reinforced polymer (CFRP) grid /
- seismic repairing /
- peseudo static test

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图 1 多层砌体开洞墙体模型

Figure 1. Description of multi-storey unreinforced masonry wall with openings

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图 2 试验加载装置

Figure 2. Test setup

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图 3 试验加载方式

Figure 3. Loading method

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图 4 量测系统

Figure 4. Measuring system

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图 5 URM墙体最终破坏情况

Figure 5. URM wall at the test end

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图 6 CFRP网格加固震损墙体

Figure 6. URM wall repaired by CFRP grids

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图 7 加固墙体最终破坏情况

Figure 7. CRM wall at the test end

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图 8 加固墙体细部破坏情况

Figure 8. Failure of the CRM wall

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图 9 墙体滞回曲线

Figure 9. Hysteresis curves of wall

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图 10 骨架曲线

Figure 10. Skeleton curves

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图 11 墙体各层刚度退化

Figure 11. Rigidity degeneration of each floor

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图 12 墙体整体实际骨架及理想骨架曲线

Figure 12. Idealized and actual skeleton curves of masonry walls

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图 13 墙体各层耗能

Figure 13. Energy dissipation of each floor

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图 14 墙体层间位移角

Figure 14. Layer displacement angles of walls

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表 1 砌体抗压强度

Table 1. Compressive strength of masonry wall MPa

材料	抗压强度
砂浆	8.6
黏土砖	17.8
混凝土立方体	35.6

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表 2 材料性能

Table 2. Material properties

材料	抗拉强度/MPa	弹性模量/GPa	厚度/mm	断裂伸长率/%
CFRP网格	4 300	240.0	0.047	1.49（X 方向），1.50（Y 方向）
CFRP布	4 153	242.0	0.167	1.72
环氧树脂胶	30	4.5		0.90

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参考文献(24)

TOMAZEVIC M. Seismic design of masonry structures[J]. Progress in Structural Engineering & Materials, 2010, 1(1): 88-95.

刘西光,王庆霖. 多层砌体结构墙体的抗震剪切强度研究[J]. 建筑结构,2012,42(12): 112-116.

LIU Xiguang, WANG Qinglin. Study on seismic shear strength of wall for multi-story masonry structures[J]. Building Structure, 2012, 42(12): 112-116.

常业军,方致君,王军. 多层砌体房屋抗震性能分析[J]. 华东冶金学院学报,2000,17(4): 358-362. doi: 10.3969/j.issn.1671-7872.2000.04.023

CHANG Yejun, FANG Zhijun, WANG Jun. Quality analysis of earthquake-proof of multi-story masonry building[J]. Journal of East China University of Metallurgy, 2000, 17(4): 358-362. doi: 10.3969/j.issn.1671-7872.2000.04.023

信任,姚继涛. 多层砌体结构墙体整体破坏模式研究[J]. 世界地震工程,2013,29(1): 139-144. doi: 10.3969/j.issn.1007-6069.2013.01.022

XIN Ren, YAO Jitao. Research on entire failure modes of multi-storey masonry walls[J]. World Earthquake Engineering, 2013, 29(1): 139-144. doi: 10.3969/j.issn.1007-6069.2013.01.022

苏启旺,孙玉平,赵世春. 基于震害的多层砌体结构抗震性能评估方法[J]. 西南交通大学学报,2011,46(1): 30-35. doi: 10.3969/j.issn.0258-2724.2011.01.005

SU Qiwang, SUN Yuping, ZHAO Shichun. Seismic evaluation method of multi-storey masonry buildings based on earthquake damage[J]. Journal of Southwest Jiaotong University, 2011, 46(1): 30-35. doi: 10.3969/j.issn.0258-2724.2011.01.005

信任,姚继涛. 多层砌体结构墙体典型抗震加固技术和方法[J]. 西安建筑科技大学学报(自然科学版),2010,42(2): 251-255. doi: 10.3969/j.issn.1006-7930.2010.02.020

XIN Ren, YAO Jitao. The a seismic strengthening techniques and methods of multi-story masonry structures[J]. Journal of Xi ’an University of Architecture and Technology (Natural Science Edition), 2010, 42(2): 251-255. doi: 10.3969/j.issn.1006-7930.2010.02.020

高小旺,高炜,刘佳,等. 多层砌体教学楼抗震加固为砌体墙与钢筋混凝土墙组合结构的探讨[J]. 建筑结构,2010,40(5): 8-10.

GAO Xiaowang, GAO Wei, LIU Jia, et al. Discussion on composite structure made up of masonry wall and reinforced concrete wall for seismic reinforcement of multi-story masonry school buildings[J]. Building Structure, 2010, 40(5): 8-10.

ELGAWADY M A, LESTUZZI P, BADOUX M. Static cyclic response of masonry walls retrofitted with fiber-reinforced polymers[J]. Journal of Composites for Construction, 2007, 11(1): 50-61. doi: 10.1061/(ASCE)1090-0268(2007)11:1(50)

ZHOU D, LEI Z, WANG J. In-plane behavior of seismically damaged masonry walls repaired with external BFRP[J]. Composite Structures, 2013, 102(4): 9-19.

岳清瑞,杨勇新. 纤维增强复合材料加固结构耐久性研究综述[J]. 建筑结构学报,2009,30(6): 8-15.

YUE Qingrui, YANG Yongxin. Introduction to durability of concrete strengthened with fiber reinforced polymer[J]. Journal of Building Structures, 2009, 30(6): 8-15.

冯鹏,叶列平,包睿,等. FRP编织网结构体系的概念、形式及基本受力分析[J]. 建筑结构学报,2007,28(4): 109-116. doi: 10.3321/j.issn:1000-6869.2007.04.015

FENG Peng, YE Lieping, BAO Rui, et al. Concepts,forms and basic analysis of FRP woven web structure[J]. Journal of Building Structures, 2007, 28(4): 109-116. doi: 10.3321/j.issn:1000-6869.2007.04.015

林磊,叶列平. FRP加固砖砌体墙的试验研究与分析[J]. 建筑结构,2005(3): 21-27.

LIN Lei, YE Lieping. Experimental investigation on masonry wall strengthened with FRP[J]. Building Structure, 2005(3): 21-27.

MOSALLAM A, BANERJEE S. Enhancement in in-plane shear capacity of unreinforced masonry (URM) walls strengthened with fiber reinforced polymer composites[J]. Composites Part B-Engineering, 2011, 42(6): 1657-1670. doi: 10.1016/j.compositesb.2011.03.015

LORENZIS L D, TENG J G. Near-surface mounted FRP reinforcement:an emerging technique for strengthening structures[J]. Composites Part B:Engineering, 2007, 38(2): 119-143. doi: 10.1016/j.compositesb.2006.08.003

ELGAWADY M A, LESTUZZI P, BADOUX M. In-plane seismic response of URM walls upgraded with FRP ASCE[J]. Journal of Composites for Construction, 2005, 9(6): 524-535. doi: 10.1061/(ASCE)1090-0268(2005)9:6(524)

赵彤,张晨军,谢剑,等. 碳纤维布用于砖砌体抗震加固的试验研究[J]. 地震工程与工程振动,2001,21(2): 89-95. doi: 10.3969/j.issn.1000-1301.2001.02.016

ZHAO Tong, ZHANG Chenjun, XIE Jian, et al. Experimental study on seismic reinforcement of brick masonry walls with continuous carbon fiber sheet[J]. Earthquake Engineering and Engineering Vibration, 2001, 21(2): 89-95. doi: 10.3969/j.issn.1000-1301.2001.02.016

MILANE G. Kinematic FE limit analysis homogenization model for masonry walls reinforced with continuous FRP grids[J]. International Journal of Solids & Structures, 2011, 48(2): 326-345.

PAPANICOLAOU C G, TRIANTAFILLOU T C, PAPATHANASIOU M, et al. Textile reinforced mortar (TRM) versus FRP as strengthening material of URM walls:out-of-plane cyclic loading[J]. Materials & Structures, 2008, 41(1): 143-157.

PAPATHANASIOU C, TRIANTAFILLOU T C, LEKKA M. Externally bonded grids as strengthening and seismic retrofitting materials of masonry panels[J]. Construction & Building Materials, 2011, 25(2): 504-514.

陕西省建筑科学研究院. 砌体结构工程施工规范: GB 50924—2014[S]. 北京: 中国建筑工业出版社, 2014.

中国建筑科学研究院. 建筑抗震试验规程: JGJ/T 101—2015[S]. 北京: 中国建筑工业出版社, 2015.

信任. 多层砌体结构破坏模式研究与控制[D]. 西安: 西安建筑科技大学, 2012.

TOMAZEVIC M. Damage as a measure for earthquake-resistant design of masonry structures:Slovenian experience[J]. Canadian Journal of Civil Engineering, 2007, 34(11): 1403-1412. doi: 10.1139/L07-128

SANTA-MARIA H, ALCAINO P. Repair of in-plane shear damaged masonry walls with external FRP[J]. Construction & Building Materials, 2011, 25(3): 1172-1180.

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