[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.

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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