玄武岩纤维布抗剪加固受损混凝土短梁研究

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (6): 58-63.

玄武岩纤维布抗剪加固受损混凝土短梁研究

赵琳,杨与辰,刘华新^*,孔祥清

辽宁工业大学土木建筑工程学院,锦州121000

收稿日期:2015-11-27 出版日期:2016-06-28 发布日期:2016-06-28
通讯作者: 刘华新(1966-),男,博士,教授,主要研究方向为工程结构加固,lgliuhuaxin@163.com。
作者简介:赵琳(1973-),女,硕士,副教授,主要研究方向为工程结构加固。
基金资助:
国家自然科学基金(11302093);辽宁省自然科学基金项目(2015020208);辽宁工业大学教师启动基金(X201223)

STUDY ON SHEAR BEHAVIOR OF PRE-CRACKED SHORT BEAMSSTRENGTHENED WITH BFRP SHEET

ZHAO Lin, YANG Yu-chen, LIU Hua-xin^*, KONG Xiang-qing

Civil Engineering &Architecture College, Liaoning University of Technology, Jinzhou 121001,China

Received:2015-11-27 Online:2016-06-28 Published:2016-06-28

摘要/Abstract

摘要： 为了研究玄武岩纤维布加固受损混凝土短梁的抗剪性能,采用BFRP布外贴法对6根受损混凝土短梁进行抗剪性能的试验研究和理论分析。研究结果表明,受损混凝土短梁外贴BFRP布加固后,抗剪承载力有所提高、跨中挠度有所减小,加固后试件抗剪承载力提高幅度最高可达31.6%;剪跨比和加固方式对加固后受损梁的抗剪性能有不同程度的改善。采用拉-压杆模型对抗剪加固的受损短梁抗剪承载力计算更为简洁准确;采用BFRP布对受损混凝土短梁的抗剪加固具有可行性。

关键词: EB法, 玄武岩纤维布, 受损短梁, 抗剪性能, 拉-压杆模型

Abstract: In order to study the shear performance of short RC beams strengthened with BFRP sheet, 6 RC pre-cracked short beams strengthened with BFRP were studied and analyzed under four-point bending test. The results indicate that the shear capacity of the strengthened beams was 31.6% greater than that of unconfined ones due to the existing of BFRP sheets. At the same time, the mid-span deflection of short beams was reduced. The shear span ratio and strengthening modes affected the shear performance of the tested beams. Strut-and-tie models were used to predict the shear capacity of tested beams and the simplified method fitted well with the test results. Short RC beams strengthened with BFRP sheet is feasible.

Key words: external bonded method, BFRP, pre-cracked short beams, shear behavior, strut-and-tie model

中图分类号:

TB332

赵琳,杨与辰,刘华新,孔祥清. 玄武岩纤维布抗剪加固受损混凝土短梁研究[J]. 玻璃钢/复合材料, 2016, 0(6): 58-63.

ZHAO Lin, YANG Yu-chen, LIU Hua-xin, KONG Xiang-qing. STUDY ON SHEAR BEHAVIOR OF PRE-CRACKED SHORT BEAMSSTRENGTHENED WITH BFRP SHEET[J]. Fiber Reinforced Plastics/Composites, 2016, 0(6): 58-63.

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