BTRC和BRRC加固混凝土梁的抗冲击性能试验研究

吕杨; 张煜; 吴学乾; 王大永; 张永权; 张学杰

doi:10.11835/j.issn.2096-6717.2021.170

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BTRC和BRRC加固混凝土梁的抗冲击性能试验研究

工程结构抗爆及防护 | 更新时间：2023-06-25

- BTRC和BRRC加固混凝土梁的抗冲击性能试验研究
- Anti-explosion and protection of engineering structures
- 土木与环境工程学报 2023年45卷第1期页码：25-34
- 作者机构：
  
  1.天津城建大学天津市土木结构保护加固重点实验室，天津 300384
  2.中铁一局集团天津建设工程有限公司，天津 300250
  3.天津大学滨海土木工程结构与安全教育部重点实验室，天津 300350
- 作者简介：
  
  吕杨（1984- ），男，博士，教授，主要从事结构工程与防灾减灾研究，E-mail: lvyangtju@163.com。
  张学杰（通信作者），男，博士，E-mail： xuejie_zhang@tju.edu.cn。
- 基金信息：
  
  天津市教委科研计划(20140909)
- DOI：10.11835/j.issn.2096-6717.2021.170
  中图分类号： TU375.1
- 收稿：2021-04-17，
  
  纸质出版：2023-02-25
- 稿件说明：
移动端阅览
吕杨, 张煜, 吴学乾, 等. BTRC和BRRC加固混凝土梁的抗冲击性能试验研究[J]. 土木与环境工程学报, 2023,45(1):25-34.

LV Yang, ZHANG Yu, WU Xueqian, et al. Anti-explosion and protection of engineering structures[J]. Journal of Civil and Environmental Engineering, 2023, 45(1): 25-34.
吕杨, 张煜, 吴学乾, 等. BTRC和BRRC加固混凝土梁的抗冲击性能试验研究[J]. 土木与环境工程学报, 2023,45(1):25-34. DOI： 10.11835/j.issn.2096-6717.2021.170.

LV Yang, ZHANG Yu, WU Xueqian, et al. Anti-explosion and protection of engineering structures[J]. Journal of Civil and Environmental Engineering, 2023, 45(1): 25-34. DOI： 10.11835/j.issn.2096-6717.2021.170.

摘要

采用落锤冲击试验机开展普通钢筋混凝土梁、玄武岩纤维网增强混凝土（BTRC）和玄武岩纤维筋（BRRC）加固梁的抗冲击性能试验研究，其中，采用未加固钢筋混凝土梁1根、不同面积BTRC和BRRC加固的钢筋混凝土梁各2根。通过分析失效破坏过程、冲击力时程曲线、支座反力时程曲线、位移时程曲线、冲击力—挠度曲线以及支座反力—挠度曲线，对BTRC和BRRC加固钢筋混凝土梁的抗冲击性能进行研究。结果表明，BTRC和BRRC加固层能有效提高试验梁的抗冲击承载力，减小试验梁的最大变形和残余变形；加固方式和配筋率/配网率对试验梁的最大变形和残余变形影响不明显；加固层中纤维网断裂和纤维筋锚固端脱粘会消耗锤头部分动能，使得加固梁的整体变形耗能占比低于普通钢筋混凝土梁。

Abstract

Drop hammer test was carried out on five reinforced concrete (RC) beams which include one as-built RC beam

two reinforced with basalt fiber rebar (BRRC) and two reinforced basalt textile (BTRC) by using drop hammer impact testing machine. The damage process

impact force time-history curve

reaction force time-history curve

deformation time-history curve

impact force-deformation curve and reaction force-deformation curve were analyzed to study the impact characteristics of the RC beams reinforced with BTRC or BRRC. Results indicate that BTRC and BRRC can significantly increase the impact load-carrying capacity

thus decreasing the peak deformation and residual deformation of the beams. The reinforcement layouts and FRP amount have marginal influence on the deformation of the beams. Part of the kinematic energy of the drop hammer can be dissipated due to the fracture of fiber net or debonding of anchor end of fiber reinforcement

resulting in lower internal energy of the reinforced beams in comparison with that of the as-built RC beam.

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Keywords

references

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