[1]唐煜,卢宏宇,邹友泉,等.组合加固钢筋混凝土梁抗弯性能试验研究[J].东南大学学报(自然科学版),2020,50(5):822-830.[doi:10.3969/j.issn.1001-0505.2020.05.005]
　Tang Yu,Lu Hongyu,Zou Youquan,et al.Experimental study on the flexural performance of reinforced concrete beams strengthened by composite method[J].Journal of Southeast University (Natural Science Edition),2020,50(5):822-830.[doi:10.3969/j.issn.1001-0505.2020.05.005]
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组合加固钢筋混凝土梁抗弯性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
50
期数:
2020年第5期
页码:
822-830
栏目:
土木工程
出版日期:
2020-09-20

文章信息/Info

Title:
Experimental study on the flexural performance of reinforced concrete beams strengthened by composite method
作者:
唐煜1; 卢宏宇2; 邹友泉3; 曾以华2; 吴刚2
1南京林业大学土木工程学院, 南京 210037; 2东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 211189; 3江西赣粤高速公路股份有限公司, 南昌 330025
Author(s):
Tang Yu1;  Lu Hongyu2;  Zou Youquan3;  Zeng Yihua2;  Wu Gang2
1College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
2Key Laboratory for Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 211189, China
3Jiangxi Ganyue Expressway Co., Ltd., Nanchang 330025, China
关键词:
组合加固;  钢筋混凝土梁;  抗弯性能;  纤维增强复合材料;  预应力高强钢丝绳
Keywords:
combined strengthening;  reinforced concrete(RC)beam;  flexural performance;  fiber-reinforced composite;  prestressed high strength steel wire rope
分类号:
TU375.1
DOI:
10.3969/j.issn.1001-0505.2020.05.005
摘要:
基于内+外(嵌入式加固+体外加固)与表+外(外贴加固+体外加固)组合加固思路,提出了嵌入式CFRP筋+体外预应力钢丝绳、外贴CFRP布+体外预应力钢丝绳组合加固混凝土梁新方法.介绍了组合加固工艺,并对组合加固混凝土梁的抗弯性能进行了试验研究. 结果表明:内+外、表+外组合加固可实现对混凝土梁开裂荷载、屈服荷载、极限荷载、抗弯刚度的有效提升,同时不降低用其他方式加固梁的延性;传统纤维增强复合材料加固混凝土结构时出现的剥离破坏模式在一定程度上被抑制和改善,加固材料强度利用率有效提升. 进一步对组合加固梁受弯最大承载力进行理论分析可知,组合加固梁破坏模式、最大承载力等试验结果与理论分析结果基本吻合,推导的理论计算方法可实现对组合加固梁最大承载力的准确评估.
Abstract:
Two combined strengthening methods were proposed based on the concept of inner + outer(refers to the near surface mounted(NSM)fiber reinforced polymer(FRP)bar+externally prestressed high strength steel wire rope)and surface + outer(refers to bonded FRP sheet + externally prestressed high strength steel wire rope). The procedures of the combined strengthening methods were introduced, and the flexural performance of the combined strengthened concrete beams was experimentally studied. Test results show that the inner + outer and surface+outer combined strengthening methods can significantly improve the crack load, yield load, maximum flexural capacity, and flexural stiffness of the RC beam, while not reducing the ductility of the beam. The deboning failure mode of the FRP reinforcements is suppressed, hence the utilization rate of the strength of the reinforcement is improved. Further theoretical analyses show that the theoretical failure mode and the ultimate bearing capacity of the reinforced beam agree well with the test results. The calculation theory can provide a relatively accurate evaluation for the strengthened beam in regards to the limit state of its bearing capacity.

参考文献/References:

[1] 卫龙武, 吕志涛, 朱万福. 建筑物评估、加固与改造[M]. 南京: 江苏科学技术出版社, 2006:1-3.
[2] 魏洋, 严少聪, 陈思, 等. FRP增强重组竹梁受弯性能数值模拟[J]. 复合材料学报, 2019, 36(4): 1036-1044. DOI:10.13801/j.cnki.fhclxb.20180613.001.
Wei Y, Yan S C, Chen S, et al. Numerical simulation on bending performance of FRP reinforced bamboo beams[J].Acta Materiae Compositae Sinica, 2019, 36(4): 1036-1044. DOI:10.13801/j.cnki.fhclxb.20180613.001. (in Chinese)
[3] 魏洋, 柏佳文, 张依睿, 等. 矩形开槽钢管混凝土柱的受压承载性能[J]. 东南大学学报(自然科学版), 2020, 50(2): 237-243.DOI:10.3969/j.issn.1001-0505.2020.02.005.
Wei Y, Bai J W, Zhang Y R, et al. Compressive behaviors of rectangular concrete-filled slotted steel tubular columns[J].Journal of Southeast University(Natural Science Edition), 2020, 50(2): 237-243. DOI:10.3969/j.issn.1001-0505.2020.02.005. (in Chinese)
[4] Wu Z S, Yuan H, Asakura T, et al. Peeling behavior and spalling resistance of bonded bidirectional fiber reinforced polymer sheets[J].Journal of Composites for Construction, 2005, 9(3): 214-226. DOI:10.1061/(asce)1090-0268(2005)9:3(214).
[5] Ha S K, Khalid H R, Park S M, et al. Interfacial crack-induced debonding behavior of sprayed FRP laminate bonded to RC beams[J].Composite Structures, 2015, 128: 176-187. DOI:10.1016/j.compstruct.2015.03.040.
[6] Schmidt J W, Christensen C O, Goltermann P, et al. Shared CFRP activation anchoring method applied to NSMR strengthening of RC beams[J].Composite Structures, 2019, 230: 111487. DOI:10.1016/j.compstruct.2019.111487.
[7] 吴刚, 蒋剑彪, 吴智深, 等. 预应力高强钢丝绳抗弯加固钢筋混凝土梁的试验研究[J]. 土木工程学报, 2007, 40(12): 17-27.DOI: 10.3321/j.issn:1000-131x.2007.12.003.
Wu G, Jiang J B, Wu Z S, et al. Experimental study on flexural strengthening of RC beams with prestressed high strength steel wire ropes[J].China Civil Engineering Journal, 2007, 40(12): 17-27. DOI:10.3321/j.issn:1000-131x.2007.12.003. (in Chinese)
[8] Li X H, Wu G, Bian R Y. Flexural behaviour of RC beams strengthened with combinations of two CFRP systems and P-SWRs[J].Magazine of Concrete Research, 2019, 71(14): 749-760. DOI:10.1680/jmacr.17.00487.
[9] 康俊涛, 马雷, 张亚州, 等. 钢板与预应力碳纤维布组合加固RC梁抗弯承载力分析[J]. 中山大学学报(自然科学版), 2018, 57(2): 94-101. DOI:10.13471/j.cnki.acta.snus.2018.02.013.
Kang J T, Ma L, Zhang Y Z, et al. Analysis of resisting flexural strength of RC beams strengthened with steel plates and prestressed CFRP sheets[J].Acta Scientiarum Naturalium Universitatis Sunyatseni, 2018, 57(2): 94-101. DOI:10.13471/j.cnki.acta.snus.2018.02.013. (in Chinese)
[10] Darain K, Jumaat M, Shukri A, et al. Strengthening of RC beams using externally bonded reinforcement combined with near-surface mounted technique[J].Polymers, 2016, 8(7): 261. DOI:10.3390/polym8070261.
[11] 张依睿, 魏洋, 柏佳文, 等. 纤维增强聚合物复合材料-钢复合圆管约束混凝土轴压性能预测模型[J]. 复合材料学报, 2019, 36(10): 2478-2485. DOI:10.13801/j.cnki.fhclxb.20181218.001.
Zhang Y R, Wei Y, Bai J W, et al. Models for predicting axial compression behavior of fiber reinforced polymer-steel composite circular tube confined concrete[J].Acta Materiae Compositae Sinica, 2019, 36(10): 2478-2485. DOI:10.13801/j.cnki.fhclxb.20181218.001. (in Chinese)
[12] Attari N, Amziane S, Chemrouk M. Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets[J].Construction and Building Materials, 2012, 37: 746-757. DOI:10.1016/j.conbuildmat.2012.07.052.
[13] Wu G, Wu Z S, Wei Y, et al. Flexural strengthening of RC beams using distributed prestressed high strength steel wire rope: Theoretical analysis[J].Structure and Infrastructure Engineering, 2014, 10(2): 160-174. DOI:10.1080/15732479.2012.715174.
[14] 龚达. 复材增强构件的屈服后强化性能及其结构承载力研究[D]. 北京: 清华大学, 2016.
　　Gong D.Post-yield hardening behavior of FRP-strengthened members and bearing capacity of structures incorporating them[D]. Beijing: Tsinghua University, 2016.(in Chinese)

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备注/Memo

备注/Memo:
收稿日期: 2020-01-17.
作者简介: 唐煜(1988—),男,博士,讲师,yt@njfu.edu.cn.
基金项目: 国家自然科学基金杰出青年科学基金资助项目(51525801)、国家自然科学基金资助项目(52008211).
引用本文: 唐煜,卢宏宇,邹友泉,等.组合加固钢筋混凝土梁抗弯性能试验研究[J].东南大学学报(自然科学版),2020,50(5):822-830. DOI:10.3969/j.issn.1001-0505.2020.05.005.
更新日期/Last Update: 2020-09-20